CN116593412B - Food detection instrument and method for microelement analysis - Google Patents

Food detection instrument and method for microelement analysis Download PDF

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CN116593412B
CN116593412B CN202310562156.8A CN202310562156A CN116593412B CN 116593412 B CN116593412 B CN 116593412B CN 202310562156 A CN202310562156 A CN 202310562156A CN 116593412 B CN116593412 B CN 116593412B
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atomization
digestion
food
sample
gas
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CN116593412A (en
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苏肯明
刘梅
梁国添
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Waltek Services Fo Shan Co ltd
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Waltek Services Fo Shan Co ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation

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  • General Physics & Mathematics (AREA)
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  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

The invention provides a food detection instrument and a method for microelement analysis, comprising the following steps: the automatic pretreatment system for the food sample is used for carrying out pretreatment for food sample digestion through automatic food sample digestion treatment to obtain a digestion mixture for food sample pretreatment; regulating and controlling a power heating atomization system, preprocessing a digestion mixture according to a food sample, and performing digestion mixture atomization through regulating and controlling a power heating atomization group to obtain a digestion mixture atomization sample; the spin-division hollow cathode lamp system generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample, irradiates the digestion mixture atomization sample, and acquires a characteristic absorption spectrum of the element to be detected; and the atomic spectrophotometry detection analysis system detects the characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performs microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtains the high-precision microelement content detection analysis result in the food sample.

Description

Food detection instrument and method for microelement analysis
Technical Field
The invention relates to the technical field of automatic control accurate detection and intelligent analysis, in particular to a food detection instrument and method for microelement analysis.
Background
At present, the food detection of trace elements is usually carried out by manually carrying out sample digestion pretreatment, the temperature control in the atomization process is not accurate enough, the automation degree of the selection of a characteristic spectrum detection light source is not high, and the comprehensive intelligent analysis is difficult to carry out after the trace element detection; specific problems also include: the problems of how to carry out automatic food sample digestion treatment, how to automatically regulate and control atomization heating power, how to automatically select a light source to generate characteristic spectrum of elements to be detected, how to carry out atomic absorption spectrophotometry detection analysis of trace elements and the like remain to be solved; therefore, there is a need for a food detection apparatus and method for trace element analysis that at least partially solves the problems of the prior art.
Disclosure of Invention
A series of concepts in simplified form are introduced in the summary section, which will be described in further detail in the detailed description section; the summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
To at least partially solve the above problems, the present invention provides a food detection apparatus for microelement analysis, comprising:
The automatic pretreatment system for the food sample is used for carrying out pretreatment for food sample digestion through automatic food sample digestion treatment to obtain a digestion mixture for food sample pretreatment;
regulating and controlling a power heating atomization system, preprocessing a digestion mixture according to a food sample, and performing digestion mixture atomization through regulating and controlling a power heating atomization group to obtain a digestion mixture atomization sample;
the spin-division hollow cathode lamp system generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample, irradiates the digestion mixture atomization sample, and acquires a characteristic absorption spectrum of the element to be detected;
and the atomic spectrophotometry detection analysis system detects the characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performs microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtains the high-precision microelement content detection analysis result in the food sample.
Preferably, the automatic food sample pretreatment system comprises:
the food sample vacuum sealing subsystem is used for carrying a food sample to be detected through the vacuum extraction opening sealing box and carrying out vacuumizing treatment on the vacuum extraction opening sealing box; the vacuum suction port of the vacuum suction port sealing box is provided with a negative pressure self-sealing end cover, and the internal pressure is reduced after the vacuum suction is performed through the negative pressure self-sealing end cover for automatic sealing;
The processing operation manipulator subsystem is used for conveying the vacuum extraction opening sealing box for containing the food samples into the pure air flow fume hood through the processing operation manipulator;
the clean air flow fume hood subsystem is characterized in that in the clean air flow fume hood, a processing operation manipulator opens a vacuum extraction opening sealing box, a food sample is added into an overflow gas-liquid secondary collecting digestion tube device, and food sample digestion pretreatment is carried out to obtain a food sample pretreatment digestion mixture;
the overflow gas-liquid secondary collecting digestion tube device comprises: a digestion tube body, a digestion tube orifice sealing cover, an overflow gas-liquid dredging pipe and a gas-liquid secondary collector; the pipe orifice sealing cover of the digestion pipe is connected with one end of an overflow gas-liquid dredging pipe, and the other end of the overflow gas-liquid dredging pipe is connected with a gas-liquid secondary collector; when volatile chemical gas or overflow foam is generated in the digestion process of the food sample, the volatile chemical gas or overflow foam is led out through an overflow dredging pipe and flows into a gas-liquid secondary collector; the gas-liquid secondary collector is provided with an upper layer structure and a lower layer structure, the upper layer space and the lower layer space are sealed and isolated through a funnel-shaped dividing layer, and a funnel hole in the middle of the funnel-shaped dividing layer is provided with a unidirectional micro-pressure sheet; the gas-liquid secondary collector is in a vacuum state initially; when overflow foam is led out of the overflow gas-liquid dredging pipe, the overflow foam is liquefied and flows into the middle funnel hole, the unidirectional micro-pressure sheet is opened to enable the overflow foam to flow into the lower space of the gas-liquid secondary collector through lower vacuum suction, and the unidirectional micro-pressure sheet reseals the middle funnel hole after the overflow foam flows out; when the overflow dredging pipe leads out volatile chemical gas and leads into the upper space of the gas-liquid secondary collector, the unidirectional micro-pressure sheet is kept sealed; volatile chemical gases and overflow foam separation are performed.
Preferably, the regulated power temperature rising atomization system comprises:
the atomization process time regulation subsystem is used for intelligently identifying the volume of the digestion mixture for pretreatment of the food sample according to the digestion mixture for pretreatment of the food sample and automatically regulating and controlling the atomization process time;
an atomization temperature regulation subsystem for setting atomization process regulation temperature according to atomization process time;
the atomization power control subsystem is used for automatically adjusting the output power of the atomization furnace according to the temperature regulated in the atomization process, and performing atomization of the digestion mixture by accurately detecting and adjusting the actual temperature of the mixture in the atomization process to obtain an atomization sample of the digestion mixture;
adjusting the actual temperature of the atomization process mixture by accurate detection includes: detecting the actual temperature of the mixture in the atomization heating process through a patch precise temperature detection group; the accurate temperature detection group of paster includes: the sample is attached to the temperature sensing piece, the heating temperature sensing probe and the temperature feedback adjusting unit of the furnace space temperature sensing probe; the sample attaching temperature sensing piece attaches to the place where the food sample pretreatment digestion mixture is placed to detect the actual temperature of the mixture in the atomization process, the heating temperature sensing probe detects the temperature of a power heating unit in the atomization process, the temperature sensing probe in the furnace space detects the temperature of the space in the furnace, and a temperature detection signal is fed back to the temperature feedback adjusting unit; when the actual temperature of the mixture and the temperature of the space in the furnace exceed the range of the uniformity of the temperature in the atomization process, the output power of the atomization furnace is automatically adjusted, so that the actual temperature of the mixture and the temperature of the space in the furnace are restored to be within the range of the uniformity of the temperature in the atomization process.
Preferably, the spin-indexed hollow cathode lamp system comprises:
the spin-division hollow cathode lamp group subsystem generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample;
the spin division control subsystem is used for controlling the spin division hollow cathode lamp group to rotate, reaching the incidence position of the atomic light source, irradiating the digestion mixture atomization sample, and obtaining the characteristic absorption spectrum of the element to be detected;
the spin-indexing hollow cathode lamp set includes: the device comprises a spin dividing plate lamp holder, a hollow cathode lamp unit and a spin driving unit; the hollow cathode lamp unit is provided with a multi-cathode type hollow cathode lamp and generates a multi-type element characteristic spectrum; the multi-cathode hollow cathode lamp is arranged on the spin index plate lamp holder; the spin dividing plate lamp holder is driven to rotate through the spin driving unit, a cathode type hollow cathode lamp corresponding to the element to be detected is selected according to the element to be detected, and the rotation reaches the incident position of the atomic light source.
Preferably, the atomic spectrophotometry analysis system includes:
the grating light splitting subsystem is used for splitting light according to the characteristic absorption spectrum of the element to be detected through the grating to obtain the spectrophotometry of the absorption spectrum;
The spectrophotometry detection subsystem is used for detecting and comparing according to the absorption spectrum spectrophotometry and through the standard absorption spectrum spectrophotometry to obtain the absorption spectrum spectrophotometry comparison result;
the luminosity detection intelligent analysis subsystem is used for intelligently analyzing the spectrophotometry comparison result of the absorption spectrum to obtain a high-precision detection analysis result of the trace element content in the food sample;
the intelligent analysis of the absorption spectrum spectrophotometry comparison result comprises the following steps: when the trace element detection result does not exceed the trace element content calibration range, prompting that the trace element content of the food is qualified; and when the trace element detection result exceeds the trace element content calibration range, prompting the food trace element to exceed the standard, and carrying out standard exceeding warning.
The invention provides a food detection method for microelement analysis, which comprises the following steps:
s100, carrying out food sample digestion pretreatment by automatic food sample digestion treatment to obtain a food sample pretreatment digestion mixture;
s200, carrying out pretreatment on the digestion mixture according to a food sample, and carrying out atomization on the digestion mixture by regulating and controlling a power heating atomization group to obtain an atomization sample of the digestion mixture;
s300, generating a characteristic spectrum of the element to be detected through a spin-index hollow cathode lamp group according to the digestion mixture atomization sample, and irradiating the digestion mixture atomization sample to obtain a characteristic absorption spectrum of the element to be detected;
S400, detecting characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performing microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtaining a microelement high-precision content detection analysis result in the food sample.
Preferably, S100 includes:
s101, carrying out vacuum pumping treatment on a vacuum pumping port sealing box by means of the vacuum pumping port sealing box to hold food samples to be detected; the vacuum suction port of the vacuum suction port sealing box is provided with a negative pressure self-sealing end cover, and the internal pressure is reduced after the vacuum suction is performed through the negative pressure self-sealing end cover for automatic sealing;
s102, conveying a vacuum extraction opening sealing box for holding food samples into a pure air flow fume hood through a treatment operation manipulator;
s103, in a clean airflow fume hood, a processing operation manipulator opens a vacuum extraction opening sealing box, a food sample is added into an overflow gas-liquid secondary collection digestion tube device, and food sample digestion pretreatment is carried out to obtain a food sample pretreatment digestion mixture;
the overflow gas-liquid secondary collecting digestion tube device comprises: a digestion tube body, a digestion tube orifice sealing cover, an overflow gas-liquid dredging pipe and a gas-liquid secondary collector; the pipe orifice sealing cover of the digestion pipe is connected with one end of an overflow gas-liquid dredging pipe, and the other end of the overflow gas-liquid dredging pipe is connected with a gas-liquid secondary collector; when volatile chemical gas or overflow foam is generated in the digestion process of the food sample, the volatile chemical gas or overflow foam is led out through an overflow dredging pipe and flows into a gas-liquid secondary collector; the gas-liquid secondary collector is provided with an upper layer structure and a lower layer structure, the upper layer space and the lower layer space are sealed and isolated through a funnel-shaped dividing layer, and a funnel hole in the middle of the funnel-shaped dividing layer is provided with a unidirectional micro-pressure sheet; the gas-liquid secondary collector is in a vacuum state initially; when overflow foam is led out of the overflow gas-liquid dredging pipe, the overflow foam is liquefied and flows into the middle funnel hole, the unidirectional micro-pressure sheet is opened to enable the overflow foam to flow into the lower space of the gas-liquid secondary collector through lower vacuum suction, and the unidirectional micro-pressure sheet reseals the middle funnel hole after the overflow foam flows out; when the overflow dredging pipe leads out volatile chemical gas and leads into the upper space of the gas-liquid secondary collector, the unidirectional micro-pressure sheet is kept sealed; volatile chemical gases and overflow foam separation are performed.
Preferably, S200 includes:
s201, intelligently identifying the volume of the digestion mixture for pretreatment of the food sample according to the digestion mixture for pretreatment of the food sample, and automatically regulating and controlling the time of an atomization process;
s202, setting an atomization process regulation temperature according to atomization process time;
s203, according to the regulation temperature of the atomization process, automatically adjusting the output power of the atomization furnace, and performing atomization of the digestion mixture by accurately detecting and adjusting the actual temperature of the mixture in the atomization process to obtain an atomization sample of the digestion mixture;
adjusting the actual temperature of the atomization process mixture by accurate detection includes: detecting the actual temperature of the mixture in the atomization heating process through a patch precise temperature detection group; the accurate temperature detection group of paster includes: the sample is attached to the temperature sensing piece, the heating temperature sensing probe and the temperature feedback adjusting unit of the furnace space temperature sensing probe; the sample attaching temperature sensing piece attaches to the place where the food sample pretreatment digestion mixture is placed to detect the actual temperature of the mixture in the atomization process, the heating temperature sensing probe detects the temperature of a power heating unit in the atomization process, the temperature sensing probe in the furnace space detects the temperature of the space in the furnace, and a temperature detection signal is fed back to the temperature feedback adjusting unit; when the actual temperature of the mixture and the temperature of the space in the furnace exceed the range of the uniformity of the temperature in the atomization process, the output power of the atomization furnace is automatically adjusted, so that the actual temperature of the mixture and the temperature of the space in the furnace are restored to be within the range of the uniformity of the temperature in the atomization process.
Preferably, S300 includes:
s301, generating a characteristic spectrum of an element to be detected through a spin-index hollow cathode lamp group according to an atomized sample of the digestion mixture;
s302, controlling the rotation of the spin-division hollow cathode lamp set to reach the incident position of an atomic light source, and irradiating an atomized sample of the digestion mixture to obtain the characteristic absorption spectrum of the element to be detected;
the spin-indexing hollow cathode lamp set includes: the device comprises a spin dividing plate lamp holder, a hollow cathode lamp unit and a spin driving unit; the hollow cathode lamp unit is provided with a multi-cathode type hollow cathode lamp and generates a multi-type element characteristic spectrum; the multi-cathode hollow cathode lamp is arranged on the spin index plate lamp holder; the spin dividing plate lamp holder is driven to rotate through the spin driving unit, a cathode type hollow cathode lamp corresponding to the element to be detected is selected according to the element to be detected, and the rotation reaches the incident position of the atomic light source.
Preferably, S400 includes:
s401, according to the characteristic absorption spectrum of the element to be detected, carrying out light splitting on the characteristic absorption spectrum of the element to be detected through a grating to obtain the spectrophotometry of the absorption spectrum;
s402, detecting and comparing through standard absorption spectrum spectrophotometry according to the absorption spectrum spectrophotometry to obtain an absorption spectrum spectrophotometry comparison result;
S403, performing intelligent analysis on the absorption spectrum spectrophotometry comparison result to obtain a high-precision detection analysis result of trace element content in the food sample;
the intelligent analysis of the absorption spectrum spectrophotometry comparison result comprises the following steps: when the trace element detection result does not exceed the trace element content calibration range, prompting that the trace element content of the food is qualified; and when the trace element detection result exceeds the trace element content calibration range, prompting the food trace element to exceed the standard, and carrying out standard exceeding warning.
Compared with the prior art, the invention at least comprises the following beneficial effects:
the invention provides a food detection instrument for microelement analysis, which utilizes an automatic food sample pretreatment system to carry out food sample pretreatment by automatic food sample digestion treatment to obtain a food sample pretreatment digestion mixture; regulating and controlling a power heating atomization system, preprocessing a digestion mixture according to a food sample, and performing digestion mixture atomization through regulating and controlling a power heating atomization group to obtain a digestion mixture atomization sample; the spin-division hollow cathode lamp system generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample, irradiates the digestion mixture atomization sample, and acquires a characteristic absorption spectrum of the element to be detected; the atomic spectrophotometry detection analysis system detects the characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performs microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtains the high-precision microelement content detection analysis result in the food sample; the automation degree of the digestion pretreatment of the food detection samples of the trace elements can be greatly improved, the temperature control accuracy in the atomization process is remarkably improved, the automation degree of the selection of the characteristic spectrum detection light source is improved, and the trace element detection is comprehensively and intelligently analyzed; the method can perform automatic food sample digestion treatment, automatically regulate and control atomization heating power, automatically select a light source to generate characteristic spectrum of the element to be detected through spin graduation, and can remarkably improve the intelligent level of trace element atomic absorption spectrophotometry detection.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
fig. 1 is a block diagram of a food detection instrument for microelement analysis according to the present invention.
Fig. 2 is a diagram of an embodiment of a food detection apparatus for trace element analysis according to the present invention.
Fig. 3 is a diagram showing steps of a method for detecting food according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings and examples to enable those skilled in the art to practice the same and to refer to the description; as shown in fig. 1 to 3, the present invention provides a food detection instrument for microelement analysis, comprising:
the automatic pretreatment system for the food sample is used for carrying out pretreatment for food sample digestion through automatic food sample digestion treatment to obtain a digestion mixture for food sample pretreatment;
Regulating and controlling a power heating atomization system, preprocessing a digestion mixture according to a food sample, and performing digestion mixture atomization through regulating and controlling a power heating atomization group to obtain a digestion mixture atomization sample;
the spin-division hollow cathode lamp system generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample, irradiates the digestion mixture atomization sample, and acquires a characteristic absorption spectrum of the element to be detected;
and the atomic spectrophotometry detection analysis system detects the characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performs microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtains the high-precision microelement content detection analysis result in the food sample.
The principle and effect of the technical scheme are as follows: the invention provides a food detection instrument for microelement analysis, which comprises: the automatic pretreatment system for the food sample is used for carrying out pretreatment for food sample digestion through automatic food sample digestion treatment to obtain a digestion mixture for food sample pretreatment; regulating and controlling a power heating atomization system, preprocessing a digestion mixture according to a food sample, and performing digestion mixture atomization through regulating and controlling a power heating atomization group to obtain a digestion mixture atomization sample; the spin-division hollow cathode lamp system generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample, irradiates the digestion mixture atomization sample, and acquires a characteristic absorption spectrum of the element to be detected; the atomic spectrophotometry detection analysis system detects the characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performs microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtains the high-precision microelement content detection analysis result in the food sample; the automation degree of the digestion pretreatment of the food detection samples of the trace elements can be greatly improved, the temperature control accuracy in the atomization process is remarkably improved, the automation degree of the selection of the characteristic spectrum detection light source is improved, and the trace element detection is comprehensively and intelligently analyzed; the method can perform automatic food sample digestion treatment, automatically regulate and control atomization heating power, automatically select a light source to generate characteristic spectrum of the element to be detected through spin graduation, and can remarkably improve the intelligent level of trace element atomic absorption spectrophotometry detection.
In one embodiment, an automated food sample pretreatment system comprises:
the food sample vacuum sealing subsystem is used for carrying a food sample to be detected through the vacuum extraction opening sealing box and carrying out vacuumizing treatment on the vacuum extraction opening sealing box; the vacuum suction port of the vacuum suction port sealing box is provided with a negative pressure self-sealing end cover, and the internal pressure is reduced after the vacuum suction is performed through the negative pressure self-sealing end cover for automatic sealing;
the processing operation manipulator subsystem is used for conveying the vacuum extraction opening sealing box for containing the food samples into the pure air flow fume hood through the processing operation manipulator;
the clean air flow fume hood subsystem is characterized in that in the clean air flow fume hood, a processing operation manipulator opens a vacuum extraction opening sealing box, a food sample is added into an overflow gas-liquid secondary collecting digestion tube device, and food sample digestion pretreatment is carried out to obtain a food sample pretreatment digestion mixture;
the overflow gas-liquid secondary collecting digestion tube device comprises: a digestion tube body, a digestion tube orifice sealing cover, an overflow gas-liquid dredging pipe and a gas-liquid secondary collector; the pipe orifice sealing cover of the digestion pipe is connected with one end of an overflow gas-liquid dredging pipe, and the other end of the overflow gas-liquid dredging pipe is connected with a gas-liquid secondary collector; when volatile chemical gas or overflow foam is generated in the digestion process of the food sample, the volatile chemical gas or overflow foam is led out through an overflow dredging pipe and flows into a gas-liquid secondary collector; the gas-liquid secondary collector is provided with an upper layer structure and a lower layer structure, the upper layer space and the lower layer space are sealed and isolated through a funnel-shaped dividing layer, and a funnel hole in the middle of the funnel-shaped dividing layer is provided with a unidirectional micro-pressure sheet; the gas-liquid secondary collector is in a vacuum state initially; when overflow foam is led out of the overflow gas-liquid dredging pipe, the overflow foam is liquefied and flows into the middle funnel hole, the unidirectional micro-pressure sheet is opened to enable the overflow foam to flow into the lower space of the gas-liquid secondary collector through lower vacuum suction, and the unidirectional micro-pressure sheet reseals the middle funnel hole after the overflow foam flows out; when the overflow dredging pipe leads out volatile chemical gas and leads into the upper space of the gas-liquid secondary collector, the unidirectional micro-pressure sheet is kept sealed; volatile chemical gases and overflow foam separation are performed.
The principle and effect of the technical scheme are as follows: an automatic food sample pretreatment system comprising: the food sample vacuum sealing subsystem is used for carrying a food sample to be detected through the vacuum extraction opening sealing box and carrying out vacuumizing treatment on the vacuum extraction opening sealing box; the vacuum suction port of the vacuum suction port sealing box is provided with a negative pressure self-sealing end cover, and the internal pressure is reduced after the vacuum suction is performed through the negative pressure self-sealing end cover for automatic sealing; the processing operation manipulator subsystem is used for conveying the vacuum extraction opening sealing box for containing the food samples into the pure air flow fume hood through the processing operation manipulator; the clean air flow fume hood subsystem is characterized in that in the clean air flow fume hood, a processing operation manipulator opens a vacuum extraction opening sealing box, a food sample is added into an overflow gas-liquid secondary collecting digestion tube device, and food sample digestion pretreatment is carried out to obtain a food sample pretreatment digestion mixture; the overflow gas-liquid secondary collecting digestion tube device comprises: a digestion tube body, a digestion tube orifice sealing cover, an overflow gas-liquid dredging pipe and a gas-liquid secondary collector; the pipe orifice sealing cover of the digestion pipe is connected with one end of an overflow gas-liquid dredging pipe, and the other end of the overflow gas-liquid dredging pipe is connected with a gas-liquid secondary collector; when volatile chemical gas or overflow foam is generated in the digestion process of the food sample, the volatile chemical gas or overflow foam is led out through an overflow dredging pipe and flows into a gas-liquid secondary collector; the gas-liquid secondary collector is provided with an upper layer structure and a lower layer structure, the upper layer space and the lower layer space are sealed and isolated through a funnel-shaped dividing layer, and a funnel hole in the middle of the funnel-shaped dividing layer is provided with a unidirectional micro-pressure sheet; the gas-liquid secondary collector is in a vacuum state initially; when overflow foam is led out of the overflow gas-liquid dredging pipe, the overflow foam is liquefied and flows into the middle funnel hole, the unidirectional micro-pressure sheet is opened to enable the overflow foam to flow into the lower space of the gas-liquid secondary collector through lower vacuum suction, and the unidirectional micro-pressure sheet reseals the middle funnel hole after the overflow foam flows out; when the overflow dredging pipe leads out volatile chemical gas and leads into the upper space of the gas-liquid secondary collector, the unidirectional micro-pressure sheet is kept sealed; carrying out separation of volatile chemical gas and overflow foam; the automatic food sample digestion treatment can be performed, and the efficiency and the safety of the food sample digestion treatment are greatly improved.
In one embodiment, a regulated power warm-up atomization system includes:
the atomization process time regulation subsystem is used for intelligently identifying the volume of the digestion mixture for pretreatment of the food sample according to the digestion mixture for pretreatment of the food sample and automatically regulating and controlling the atomization process time;
an atomization temperature regulation subsystem for setting atomization process regulation temperature according to atomization process time;
the atomization power control subsystem is used for automatically adjusting the output power of the atomization furnace according to the temperature regulated in the atomization process, and performing atomization of the digestion mixture by accurately detecting and adjusting the actual temperature of the mixture in the atomization process to obtain an atomization sample of the digestion mixture;
adjusting the actual temperature of the atomization process mixture by accurate detection includes: detecting the actual temperature of the mixture in the atomization heating process through a patch precise temperature detection group; the accurate temperature detection group of paster includes: the sample is attached to the temperature sensing piece, the heating temperature sensing probe and the temperature feedback adjusting unit of the furnace space temperature sensing probe; the sample attaching temperature sensing piece attaches to the place where the food sample pretreatment digestion mixture is placed to detect the actual temperature of the mixture in the atomization process, the heating temperature sensing probe detects the temperature of a power heating unit in the atomization process, the temperature sensing probe in the furnace space detects the temperature of the space in the furnace, and a temperature detection signal is fed back to the temperature feedback adjusting unit; when the actual temperature of the mixture and the temperature of the space in the furnace exceed the range of the uniformity of the temperature in the atomization process, the output power of the atomization furnace is automatically adjusted, so that the actual temperature of the mixture and the temperature of the space in the furnace are restored to be within the range of the uniformity of the temperature in the atomization process.
The principle and effect of the technical scheme are as follows: the regulated power temperature rising atomization system comprises: the atomization process time regulation subsystem is used for intelligently identifying the volume of the digestion mixture for pretreatment of the food sample according to the digestion mixture for pretreatment of the food sample and automatically regulating and controlling the atomization process time; an atomization temperature regulation subsystem for setting atomization process regulation temperature according to atomization process time; the atomization power control subsystem is used for automatically adjusting the output power of the atomization furnace according to the temperature regulated in the atomization process, and performing atomization of the digestion mixture by accurately detecting and adjusting the actual temperature of the mixture in the atomization process to obtain an atomization sample of the digestion mixture; adjusting the actual temperature of the atomization process mixture by accurate detection includes: detecting the actual temperature of the mixture in the atomization heating process through a patch precise temperature detection group; the accurate temperature detection group of paster includes: the sample is attached to the temperature sensing piece, the heating temperature sensing probe and the temperature feedback adjusting unit of the furnace space temperature sensing probe; the sample attaching temperature sensing piece attaches to the place where the food sample pretreatment digestion mixture is placed to detect the actual temperature of the mixture in the atomization process, the heating temperature sensing probe detects the temperature of a power heating unit in the atomization process, the temperature sensing probe in the furnace space detects the temperature of the space in the furnace, and a temperature detection signal is fed back to the temperature feedback adjusting unit; when the actual temperature of the mixture and the temperature of the space in the furnace exceed the uniformity difference range of the temperature in the atomization process, the output power of the atomization furnace is automatically adjusted, so that the actual temperature of the mixture and the temperature of the space in the furnace are restored to be within the uniformity difference range of the temperature in the atomization process; the atomization heating power can be automatically regulated and controlled, and the accuracy of the atomization heating process is obviously improved.
In one embodiment, a spin-indexed hollow cathode lamp system includes:
the spin-division hollow cathode lamp group subsystem generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample;
the spin division control subsystem is used for controlling the spin division hollow cathode lamp group to rotate, reaching the incidence position of the atomic light source, irradiating the digestion mixture atomization sample, and obtaining the characteristic absorption spectrum of the element to be detected;
the spin-indexing hollow cathode lamp set includes: the device comprises a spin dividing plate lamp holder, a hollow cathode lamp unit and a spin driving unit; the hollow cathode lamp unit is provided with a multi-cathode type hollow cathode lamp and generates a multi-type element characteristic spectrum; the multi-cathode hollow cathode lamp is arranged on the spin index plate lamp holder; the spin dividing plate lamp holder is driven to rotate through the spin driving unit, a cathode type hollow cathode lamp corresponding to the element to be detected is selected according to the element to be detected, and the rotation reaches the incident position of the atomic light source.
The principle and effect of the technical scheme are as follows: the spin-indexing hollow cathode lamp system includes: the spin-division hollow cathode lamp group subsystem generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample; the spin division control subsystem is used for controlling the spin division hollow cathode lamp group to rotate, reaching the incidence position of the atomic light source, irradiating the digestion mixture atomization sample, and obtaining the characteristic absorption spectrum of the element to be detected; the spin-indexing hollow cathode lamp set includes: the device comprises a spin dividing plate lamp holder, a hollow cathode lamp unit and a spin driving unit; the hollow cathode lamp unit is provided with a multi-cathode type hollow cathode lamp and generates a multi-type element characteristic spectrum; the multi-cathode hollow cathode lamp is arranged on the spin index plate lamp holder; the spin dividing plate lamp holder is driven to rotate through the spin driving unit, a cathode type hollow cathode lamp corresponding to the element to be detected is selected according to the element to be detected, and the rotation reaches the incident position of the atomic light source; the characteristic spectrum of the element to be detected can be generated by automatically selecting the light source through spin graduation.
In one embodiment, an atomic spectrophotometry analysis system includes:
the grating light splitting subsystem is used for splitting light according to the characteristic absorption spectrum of the element to be detected through the grating to obtain the spectrophotometry of the absorption spectrum;
the spectrophotometry detection subsystem is used for detecting and comparing according to the absorption spectrum spectrophotometry and through the standard absorption spectrum spectrophotometry to obtain the absorption spectrum spectrophotometry comparison result;
the luminosity detection intelligent analysis subsystem is used for intelligently analyzing the spectrophotometry comparison result of the absorption spectrum to obtain a high-precision detection analysis result of the trace element content in the food sample;
the intelligent analysis of the absorption spectrum spectrophotometry comparison result comprises the following steps: when the trace element detection result does not exceed the trace element content calibration range, prompting that the trace element content of the food is qualified; and when the trace element detection result exceeds the trace element content calibration range, prompting the food trace element to exceed the standard, and carrying out standard exceeding warning.
The principle and effect of the technical scheme are as follows: the atomic spectrophotometry detection analysis system comprises: the grating light splitting subsystem is used for splitting light according to the characteristic absorption spectrum of the element to be detected through the grating to obtain the spectrophotometry of the absorption spectrum; the spectrophotometry detection subsystem is used for detecting and comparing according to the absorption spectrum spectrophotometry and through the standard absorption spectrum spectrophotometry to obtain the absorption spectrum spectrophotometry comparison result; the luminosity detection intelligent analysis subsystem is used for intelligently analyzing the spectrophotometry comparison result of the absorption spectrum to obtain a high-precision detection analysis result of the trace element content in the food sample; the intelligent analysis of the absorption spectrum spectrophotometry comparison result comprises the following steps: when the trace element detection result does not exceed the trace element content calibration range, prompting that the trace element content of the food is qualified; when the trace element detection result exceeds the trace element content calibration range, prompting the food trace element to exceed the standard, and carrying out standard exceeding warning; the intelligent level of the trace element atomic absorption spectrophotometry detection can be remarkably improved.
The invention provides a food detection method for microelement analysis, which comprises the following steps:
s100, carrying out food sample digestion pretreatment by automatic food sample digestion treatment to obtain a food sample pretreatment digestion mixture;
s200, carrying out pretreatment on the digestion mixture according to a food sample, and carrying out atomization on the digestion mixture by regulating and controlling a power heating atomization group to obtain an atomization sample of the digestion mixture;
s300, generating a characteristic spectrum of the element to be detected through a spin-index hollow cathode lamp group according to the digestion mixture atomization sample, and irradiating the digestion mixture atomization sample to obtain a characteristic absorption spectrum of the element to be detected;
s400, detecting characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performing microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtaining a microelement high-precision content detection analysis result in the food sample.
The principle and effect of the technical scheme are as follows: the invention provides a food detection method for microelement analysis, which comprises the following steps: carrying out food sample digestion pretreatment by automatic food sample digestion treatment to obtain a food sample pretreatment digestion mixture; according to the pretreatment of the food sample, carrying out the atomization of the digestion mixture by regulating and controlling the power to raise the temperature of the atomization group, so as to obtain an atomization sample of the digestion mixture; according to the digestion mixture atomization sample, generating a characteristic spectrum of the element to be detected through a spin-index hollow cathode lamp group, and irradiating the digestion mixture atomization sample to obtain a characteristic absorption spectrum of the element to be detected; detecting the characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performing microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtaining the high-precision microelement content detection and analysis result in the food sample; the automation degree of the digestion pretreatment of the food detection samples of the trace elements can be greatly improved, the temperature control accuracy in the atomization process is remarkably improved, the automation degree of the selection of the characteristic spectrum detection light source is improved, and the trace element detection is comprehensively and intelligently analyzed; the method can perform automatic food sample digestion treatment, automatically regulate and control atomization heating power, automatically select a light source to generate characteristic spectrum of the element to be detected through spin graduation, and can remarkably improve the intelligent level of trace element atomic absorption spectrophotometry detection.
In one embodiment, S100 comprises:
s101, carrying out vacuum pumping treatment on a vacuum pumping port sealing box by means of the vacuum pumping port sealing box to hold food samples to be detected; the vacuum suction port of the vacuum suction port sealing box is provided with a negative pressure self-sealing end cover, and the internal pressure is reduced after the vacuum suction is performed through the negative pressure self-sealing end cover for automatic sealing;
s102, conveying a vacuum extraction opening sealing box for holding food samples into a pure air flow fume hood through a treatment operation manipulator;
s103, in a clean airflow fume hood, a processing operation manipulator opens a vacuum extraction opening sealing box, a food sample is added into an overflow gas-liquid secondary collection digestion tube device, and food sample digestion pretreatment is carried out to obtain a food sample pretreatment digestion mixture;
the overflow gas-liquid secondary collecting digestion tube device comprises: a digestion tube body, a digestion tube orifice sealing cover, an overflow gas-liquid dredging pipe and a gas-liquid secondary collector; the pipe orifice sealing cover of the digestion pipe is connected with one end of an overflow gas-liquid dredging pipe, and the other end of the overflow gas-liquid dredging pipe is connected with a gas-liquid secondary collector; when volatile chemical gas or overflow foam is generated in the digestion process of the food sample, the volatile chemical gas or overflow foam is led out through an overflow dredging pipe and flows into a gas-liquid secondary collector; the gas-liquid secondary collector is provided with an upper layer structure and a lower layer structure, the upper layer space and the lower layer space are sealed and isolated through a funnel-shaped dividing layer, and a funnel hole in the middle of the funnel-shaped dividing layer is provided with a unidirectional micro-pressure sheet; the gas-liquid secondary collector is in a vacuum state initially; when overflow foam is led out of the overflow gas-liquid dredging pipe, the overflow foam is liquefied and flows into the middle funnel hole, the unidirectional micro-pressure sheet is opened to enable the overflow foam to flow into the lower space of the gas-liquid secondary collector through lower vacuum suction, and the unidirectional micro-pressure sheet reseals the middle funnel hole after the overflow foam flows out; when the overflow dredging pipe leads out volatile chemical gas and leads into the upper space of the gas-liquid secondary collector, the unidirectional micro-pressure sheet is kept sealed; volatile chemical gases and overflow foam separation are performed.
The principle and effect of the technical scheme are as follows: carrying out vacuum pumping treatment on the vacuum pumping port sealing box by the vacuum pumping port sealing box for containing food samples to be detected; the vacuum suction port of the vacuum suction port sealing box is provided with a negative pressure self-sealing end cover, and the internal pressure is reduced after the vacuum suction is performed through the negative pressure self-sealing end cover for automatic sealing; feeding the vacuum extraction opening sealing box for holding the food sample into a pure air flow fume hood through a treatment operation manipulator; in a clean airflow fume hood, a processing operation manipulator opens a vacuum extraction opening sealing box, a food sample is added into an overflow gas-liquid secondary collecting digestion tube device, and food sample digestion pretreatment is carried out to obtain a food sample pretreatment digestion mixture; the overflow gas-liquid secondary collecting digestion tube device comprises: a digestion tube body, a digestion tube orifice sealing cover, an overflow gas-liquid dredging pipe and a gas-liquid secondary collector; the pipe orifice sealing cover of the digestion pipe is connected with one end of an overflow gas-liquid dredging pipe, and the other end of the overflow gas-liquid dredging pipe is connected with a gas-liquid secondary collector; when volatile chemical gas or overflow foam is generated in the digestion process of the food sample, the volatile chemical gas or overflow foam is led out through an overflow dredging pipe and flows into a gas-liquid secondary collector; the gas-liquid secondary collector is provided with an upper layer structure and a lower layer structure, the upper layer space and the lower layer space are sealed and isolated through a funnel-shaped dividing layer, and a funnel hole in the middle of the funnel-shaped dividing layer is provided with a unidirectional micro-pressure sheet; the gas-liquid secondary collector is in a vacuum state initially; when overflow foam is led out of the overflow gas-liquid dredging pipe, the overflow foam is liquefied and flows into the middle funnel hole, the unidirectional micro-pressure sheet is opened to enable the overflow foam to flow into the lower space of the gas-liquid secondary collector through lower vacuum suction, and the unidirectional micro-pressure sheet reseals the middle funnel hole after the overflow foam flows out; when the overflow dredging pipe leads out volatile chemical gas and leads into the upper space of the gas-liquid secondary collector, the unidirectional micro-pressure sheet is kept sealed; carrying out separation of volatile chemical gas and overflow foam; the automatic food sample digestion treatment can be performed, and the efficiency and the safety of the food sample digestion treatment are greatly improved.
In one embodiment, S200 includes:
s201, intelligently identifying the volume of the digestion mixture for pretreatment of the food sample according to the digestion mixture for pretreatment of the food sample, and automatically regulating and controlling the time of an atomization process;
s202, setting an atomization process regulation temperature according to atomization process time;
s203, according to the regulation temperature of the atomization process, automatically adjusting the output power of the atomization furnace, and performing atomization of the digestion mixture by accurately detecting and adjusting the actual temperature of the mixture in the atomization process to obtain an atomization sample of the digestion mixture;
adjusting the actual temperature of the atomization process mixture by accurate detection includes: detecting the actual temperature of the mixture in the atomization heating process through a patch precise temperature detection group; the accurate temperature detection group of paster includes: the sample is attached to the temperature sensing piece, the heating temperature sensing probe and the temperature feedback adjusting unit of the furnace space temperature sensing probe; the sample attaching temperature sensing piece attaches to the place where the food sample pretreatment digestion mixture is placed to detect the actual temperature of the mixture in the atomization process, the heating temperature sensing probe detects the temperature of a power heating unit in the atomization process, the temperature sensing probe in the furnace space detects the temperature of the space in the furnace, and a temperature detection signal is fed back to the temperature feedback adjusting unit; when the actual temperature of the mixture and the temperature of the space in the furnace exceed the range of the uniformity of the temperature in the atomization process, the output power of the atomization furnace is automatically adjusted, so that the actual temperature of the mixture and the temperature of the space in the furnace are restored to be within the range of the uniformity of the temperature in the atomization process.
The principle and effect of the technical scheme are as follows: according to the food sample pretreatment digestion mixture, the volume of the food sample pretreatment digestion mixture is intelligently identified, and the atomization process time is automatically regulated; setting an atomization process regulation temperature according to atomization process time; according to the regulation temperature of the atomization process, the output power of the atomization furnace is automatically regulated, and the actual temperature of the mixture in the atomization process is accurately detected and regulated to perform atomization of the digestion mixture, so as to obtain an atomization sample of the digestion mixture; adjusting the actual temperature of the atomization process mixture by accurate detection includes: detecting the actual temperature of the mixture in the atomization heating process through a patch precise temperature detection group; the accurate temperature detection group of paster includes: the sample is attached to the temperature sensing piece, the heating temperature sensing probe and the temperature feedback adjusting unit of the furnace space temperature sensing probe; the sample attaching temperature sensing piece attaches to the place where the food sample pretreatment digestion mixture is placed to detect the actual temperature of the mixture in the atomization process, the heating temperature sensing probe detects the temperature of a power heating unit in the atomization process, the temperature sensing probe in the furnace space detects the temperature of the space in the furnace, and a temperature detection signal is fed back to the temperature feedback adjusting unit; when the actual temperature of the mixture and the temperature of the space in the furnace exceed the uniformity difference range of the temperature in the atomization process, the output power of the atomization furnace is automatically adjusted, so that the actual temperature of the mixture and the temperature of the space in the furnace are restored to be within the uniformity difference range of the temperature in the atomization process; the atomization heating power can be automatically regulated and controlled, and the accuracy of the atomization heating process is obviously improved.
In one embodiment, S300 includes:
s301, generating a characteristic spectrum of an element to be detected through a spin-index hollow cathode lamp group according to an atomized sample of the digestion mixture;
s302, controlling the rotation of the spin-division hollow cathode lamp set to reach the incident position of an atomic light source, and irradiating an atomized sample of the digestion mixture to obtain the characteristic absorption spectrum of the element to be detected;
the spin-indexing hollow cathode lamp set includes: the device comprises a spin dividing plate lamp holder, a hollow cathode lamp unit and a spin driving unit; the hollow cathode lamp unit is provided with a multi-cathode type hollow cathode lamp and generates a multi-type element characteristic spectrum; the multi-cathode hollow cathode lamp is arranged on the spin index plate lamp holder; the spin dividing plate lamp holder is driven to rotate through the spin driving unit, a cathode type hollow cathode lamp corresponding to the element to be detected is selected according to the element to be detected, and the rotation reaches the incident position of the atomic light source.
The principle and effect of the technical scheme are as follows: according to the digestion mixture atomization sample, generating a characteristic spectrum of the element to be detected through a spin-index hollow cathode lamp group; controlling the rotation of the spin-division hollow cathode lamp group to reach the incident position of the atomic light source, irradiating the digestion mixture atomized sample, and obtaining the characteristic absorption spectrum of the element to be detected; the spin-indexing hollow cathode lamp set includes: the device comprises a spin dividing plate lamp holder, a hollow cathode lamp unit and a spin driving unit; the hollow cathode lamp unit is provided with a multi-cathode type hollow cathode lamp and generates a multi-type element characteristic spectrum; the multi-cathode hollow cathode lamp is arranged on the spin index plate lamp holder; the spin dividing plate lamp holder is driven to rotate through the spin driving unit, a cathode type hollow cathode lamp corresponding to the element to be detected is selected according to the element to be detected, and the rotation reaches the incident position of the atomic light source; the characteristic spectrum of the element to be detected can be generated by automatically selecting the light source through spin graduation.
In one embodiment, S400 includes:
s401, according to the characteristic absorption spectrum of the element to be detected, carrying out light splitting on the characteristic absorption spectrum of the element to be detected through a grating to obtain the spectrophotometry of the absorption spectrum;
s402, detecting and comparing through standard absorption spectrum spectrophotometry according to the absorption spectrum spectrophotometry to obtain an absorption spectrum spectrophotometry comparison result;
s403, performing intelligent analysis on the absorption spectrum spectrophotometry comparison result to obtain a high-precision detection analysis result of trace element content in the food sample;
the intelligent analysis of the absorption spectrum spectrophotometry comparison result comprises the following steps: when the trace element detection result does not exceed the trace element content calibration range, prompting that the trace element content of the food is qualified; and when the trace element detection result exceeds the trace element content calibration range, prompting the food trace element to exceed the standard, and carrying out standard exceeding warning.
The principle and effect of the technical scheme are as follows: according to the characteristic absorption spectrum of the element to be detected, carrying out light splitting on the characteristic absorption spectrum of the element to be detected through a grating to obtain the spectrophotometry of the absorption spectrum; detecting and comparing according to the absorption spectrum spectrophotometry through the standard absorption spectrum spectrophotometry to obtain an absorption spectrum spectrophotometry comparison result; performing intelligent analysis on the absorption spectrum spectrophotometry comparison result to obtain a high-precision detection analysis result of the trace element content in the food sample; the intelligent analysis of the absorption spectrum spectrophotometry comparison result comprises the following steps: when the trace element detection result does not exceed the trace element content calibration range, prompting that the trace element content of the food is qualified; when the trace element detection result exceeds the trace element content calibration range, prompting the food trace element to exceed the standard, and carrying out standard exceeding warning; the intelligent level of the trace element atomic absorption spectrophotometry detection can be remarkably improved.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (8)

1. A food detection instrument for trace element analysis, comprising:
the automatic pretreatment system for the food sample is used for carrying out pretreatment for food sample digestion through automatic food sample digestion treatment to obtain a digestion mixture for food sample pretreatment;
regulating and controlling a power heating atomization system, preprocessing a digestion mixture according to a food sample, and performing digestion mixture atomization through regulating and controlling a power heating atomization group to obtain a digestion mixture atomization sample;
the spin-division hollow cathode lamp system generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample, irradiates the digestion mixture atomization sample, and acquires a characteristic absorption spectrum of the element to be detected;
The atomic spectrophotometry detection analysis system detects the characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performs microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtains the high-precision microelement content detection analysis result in the food sample;
an automatic food sample pretreatment system comprising:
the food sample vacuum sealing subsystem is used for carrying a food sample to be detected through the vacuum extraction opening sealing box and carrying out vacuumizing treatment on the vacuum extraction opening sealing box; the vacuum suction port of the vacuum suction port sealing box is provided with a negative pressure self-sealing end cover, and the internal pressure is reduced after the vacuum suction is performed through the negative pressure self-sealing end cover for automatic sealing;
the processing operation manipulator subsystem is used for conveying the vacuum extraction opening sealing box for containing the food samples into the pure air flow fume hood through the processing operation manipulator;
the clean air flow fume hood subsystem is characterized in that in the clean air flow fume hood, a processing operation manipulator opens a vacuum extraction opening sealing box, a food sample is added into an overflow gas-liquid secondary collecting digestion tube device, and food sample digestion pretreatment is carried out to obtain a food sample pretreatment digestion mixture;
the overflow gas-liquid secondary collecting digestion tube device comprises: a digestion tube body, a digestion tube orifice sealing cover, an overflow gas-liquid dredging pipe and a gas-liquid secondary collector; the pipe orifice sealing cover of the digestion pipe is connected with one end of an overflow gas-liquid dredging pipe, and the other end of the overflow gas-liquid dredging pipe is connected with a gas-liquid secondary collector; when volatile chemical gas or overflow foam is generated in the digestion process of the food sample, the volatile chemical gas or overflow foam is led out through an overflow dredging pipe and flows into a gas-liquid secondary collector; the gas-liquid secondary collector is provided with an upper layer structure and a lower layer structure, the upper layer space and the lower layer space are sealed and isolated through a funnel-shaped dividing layer, and a funnel hole in the middle of the funnel-shaped dividing layer is provided with a unidirectional micro-pressure sheet; the gas-liquid secondary collector is in a vacuum state initially; when overflow foam is led out of the overflow gas-liquid dredging pipe, the overflow foam is liquefied and flows into the middle funnel hole, the unidirectional micro-pressure sheet is opened to enable the overflow foam to flow into the lower space of the gas-liquid secondary collector through lower vacuum suction, and the unidirectional micro-pressure sheet reseals the middle funnel hole after the overflow foam flows out; when the overflow dredging pipe leads out volatile chemical gas and leads into the upper space of the gas-liquid secondary collector, the unidirectional micro-pressure sheet is kept sealed; volatile chemical gases and overflow foam separation are performed.
2. The food detection apparatus for trace element analysis according to claim 1, wherein the regulated power temperature rising atomization system comprises:
the atomization process time regulation subsystem is used for intelligently identifying the volume of the digestion mixture for pretreatment of the food sample according to the digestion mixture for pretreatment of the food sample and automatically regulating and controlling the atomization process time;
an atomization temperature regulation subsystem for setting atomization process regulation temperature according to atomization process time;
and the atomization power control subsystem is used for automatically adjusting the output power of the atomization furnace according to the atomization process control temperature, and performing atomization of the digestion mixture by accurately detecting and adjusting the actual temperature of the mixture in the atomization process to obtain an atomization sample of the digestion mixture.
3. A food detection apparatus for trace element analysis according to claim 1, wherein the spin-index hollow cathode lamp system comprises:
the spin-division hollow cathode lamp group subsystem generates a characteristic spectrum of the element to be detected through the spin-division hollow cathode lamp group according to the digestion mixture atomization sample;
the spin division control subsystem is used for controlling the spin division hollow cathode lamp group to rotate, reaching the incidence position of the atomic light source, irradiating the digestion mixture atomization sample, and obtaining the characteristic absorption spectrum of the element to be detected;
The spin-indexing hollow cathode lamp set includes: the device comprises a spin dividing plate lamp holder, a hollow cathode lamp unit and a spin driving unit; the hollow cathode lamp unit is provided with a multi-cathode type hollow cathode lamp and generates a multi-type element characteristic spectrum; the multi-cathode hollow cathode lamp is arranged on the spin index plate lamp holder; the spin dividing plate lamp holder is driven to rotate through the spin driving unit, a cathode type hollow cathode lamp corresponding to the element to be detected is selected according to the element to be detected, and the rotation reaches the incident position of the atomic light source.
4. A food detection apparatus for trace element analysis according to claim 1, wherein the atomic spectrophotometry detection analysis system comprises:
the grating light splitting subsystem is used for splitting light according to the characteristic absorption spectrum of the element to be detected through the grating to obtain the spectrophotometry of the absorption spectrum;
the spectrophotometry detection subsystem is used for detecting and comparing according to the absorption spectrum spectrophotometry and through the standard absorption spectrum spectrophotometry to obtain the absorption spectrum spectrophotometry comparison result;
the luminosity detection intelligent analysis subsystem is used for intelligently analyzing the spectrophotometry comparison result of the absorption spectrum to obtain a high-precision detection analysis result of the trace element content in the food sample;
The intelligent analysis of the absorption spectrum spectrophotometry comparison result comprises the following steps: when the trace element detection result does not exceed the trace element content calibration range, prompting that the trace element content of the food is qualified; and when the trace element detection result exceeds the trace element content calibration range, prompting the food trace element to exceed the standard, and carrying out standard exceeding warning.
5. A method for detecting food by microelement analysis, comprising:
s100, carrying out food sample digestion pretreatment by automatic food sample digestion treatment to obtain a food sample pretreatment digestion mixture;
s200, carrying out pretreatment on the digestion mixture according to a food sample, and carrying out atomization on the digestion mixture by regulating and controlling a power heating atomization group to obtain an atomization sample of the digestion mixture;
s300, generating a characteristic spectrum of the element to be detected through a spin-index hollow cathode lamp group according to the digestion mixture atomization sample, and irradiating the digestion mixture atomization sample to obtain a characteristic absorption spectrum of the element to be detected;
s400, detecting characteristic absorption spectrum of the element to be detected through grating spectrophotometry, performing microelement atomic absorption spectrophotometry detection and intelligent analysis, and obtaining a microelement high-precision content detection analysis result in the food sample;
S100 includes:
s101, carrying out vacuum pumping treatment on a vacuum pumping port sealing box by means of the vacuum pumping port sealing box to hold food samples to be detected; the vacuum suction port of the vacuum suction port sealing box is provided with a negative pressure self-sealing end cover, and the internal pressure is reduced after the vacuum suction is performed through the negative pressure self-sealing end cover for automatic sealing;
s102, conveying a vacuum extraction opening sealing box for holding food samples into a pure air flow fume hood through a treatment operation manipulator;
s103, in a clean airflow fume hood, a processing operation manipulator opens a vacuum extraction opening sealing box, a food sample is added into an overflow gas-liquid secondary collection digestion tube device, and food sample digestion pretreatment is carried out to obtain a food sample pretreatment digestion mixture;
the overflow gas-liquid secondary collecting digestion tube device comprises: a digestion tube body, a digestion tube orifice sealing cover, an overflow gas-liquid dredging pipe and a gas-liquid secondary collector; the pipe orifice sealing cover of the digestion pipe is connected with one end of an overflow gas-liquid dredging pipe, and the other end of the overflow gas-liquid dredging pipe is connected with a gas-liquid secondary collector; when volatile chemical gas or overflow foam is generated in the digestion process of the food sample, the volatile chemical gas or overflow foam is led out through an overflow dredging pipe and flows into a gas-liquid secondary collector; the gas-liquid secondary collector is provided with an upper layer structure and a lower layer structure, the upper layer space and the lower layer space are sealed and isolated through a funnel-shaped dividing layer, and a funnel hole in the middle of the funnel-shaped dividing layer is provided with a unidirectional micro-pressure sheet; the gas-liquid secondary collector is in a vacuum state initially; when overflow foam is led out of the overflow gas-liquid dredging pipe, the overflow foam is liquefied and flows into the middle funnel hole, the unidirectional micro-pressure sheet is opened to enable the overflow foam to flow into the lower space of the gas-liquid secondary collector through lower vacuum suction, and the unidirectional micro-pressure sheet reseals the middle funnel hole after the overflow foam flows out; when the overflow dredging pipe leads out volatile chemical gas and leads into the upper space of the gas-liquid secondary collector, the unidirectional micro-pressure sheet is kept sealed; volatile chemical gases and overflow foam separation are performed.
6. The method for detecting a trace element analyzing food according to claim 5, wherein S200 comprises:
s201, intelligently identifying the volume of the digestion mixture for pretreatment of the food sample according to the digestion mixture for pretreatment of the food sample, and automatically regulating and controlling the time of an atomization process;
s202, setting an atomization process regulation temperature according to atomization process time;
s203, according to the regulated temperature of the atomization process, the output power of the atomization furnace is automatically regulated, and the actual temperature of the mixture in the atomization process is accurately detected and regulated to perform atomization of the digestion mixture, so as to obtain an atomization sample of the digestion mixture.
7. The method for detecting a trace element analyzing food according to claim 5, wherein S300 comprises:
s301, generating a characteristic spectrum of an element to be detected through a spin-index hollow cathode lamp group according to an atomized sample of the digestion mixture;
s302, controlling the rotation of the spin-division hollow cathode lamp set to reach the incident position of an atomic light source, and irradiating an atomized sample of the digestion mixture to obtain the characteristic absorption spectrum of the element to be detected;
the spin-indexing hollow cathode lamp set includes: the device comprises a spin dividing plate lamp holder, a hollow cathode lamp unit and a spin driving unit; the hollow cathode lamp unit is provided with a multi-cathode type hollow cathode lamp and generates a multi-type element characteristic spectrum; the multi-cathode hollow cathode lamp is arranged on the spin index plate lamp holder; the spin dividing plate lamp holder is driven to rotate through the spin driving unit, a cathode type hollow cathode lamp corresponding to the element to be detected is selected according to the element to be detected, and the rotation reaches the incident position of the atomic light source.
8. The method for detecting a trace element analyzing food according to claim 5, wherein S400 comprises:
s401, according to the characteristic absorption spectrum of the element to be detected, carrying out light splitting on the characteristic absorption spectrum of the element to be detected through a grating to obtain the spectrophotometry of the absorption spectrum;
s402, detecting and comparing through standard absorption spectrum spectrophotometry according to the absorption spectrum spectrophotometry to obtain an absorption spectrum spectrophotometry comparison result;
s403, performing intelligent analysis on the absorption spectrum spectrophotometry comparison result to obtain a high-precision detection analysis result of trace element content in the food sample;
the intelligent analysis of the absorption spectrum spectrophotometry comparison result comprises the following steps: when the trace element detection result does not exceed the trace element content calibration range, prompting that the trace element content of the food is qualified; and when the trace element detection result exceeds the trace element content calibration range, prompting the food trace element to exceed the standard, and carrying out standard exceeding warning.
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