CN114894563A - Method for online monitoring of inorganic elements in environmental air particles - Google Patents

Method for online monitoring of inorganic elements in environmental air particles Download PDF

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Publication number
CN114894563A
CN114894563A CN202210657211.7A CN202210657211A CN114894563A CN 114894563 A CN114894563 A CN 114894563A CN 202210657211 A CN202210657211 A CN 202210657211A CN 114894563 A CN114894563 A CN 114894563A
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China
Prior art keywords
inert gas
air
sample
detected
ambient air
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CN202210657211.7A
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Chinese (zh)
Inventor
栾旭东
冯利辉
蔡丹丹
蒋敏杰
柴美云
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Shanghai Impact Scientific Instrument Co ltd
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Shanghai Impact Scientific Instrument Co ltd
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Priority to CN202210657211.7A priority Critical patent/CN114894563A/en
Publication of CN114894563A publication Critical patent/CN114894563A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/2273—Atmospheric sampling
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/02—Devices for withdrawing samples
    • G01N1/22—Devices for withdrawing samples in the gaseous state
    • G01N1/24—Suction devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/62—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode
    • G01N27/626—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating the ionisation of gases, e.g. aerosols; by investigating electric discharges, e.g. emission of cathode using heat to ionise a gas
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G01N2001/2873—Cutting or cleaving
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Molecular Biology (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a method for on-line monitoring of inorganic elements in environmental air particles, which comprises the steps of pumping environmental air to be detected into a particle cutter by using a pump, obtaining an air sample containing particles with required particle sizes, and conveying the air sample into a gas replacement device, wherein the air in the environmental air to be detected in a channel is replaced by inert gas in the gas replacement device to form an inert gas sample to be detected containing the particles with the required particle sizes, and the inert gas sample to be detected enters an inductively coupled plasma mass spectrometer for detection and the concentration of the inorganic elements in the inert gas sample to be detected is analyzed; the invention also provides corresponding equipment; the invention solves the problem that the prior art can not carry out direct air sample injection analysis, and provides a method and equipment for analyzing inorganic elements in air particles by directly feeding air into an I CP-MS.

Description

Method for online monitoring of inorganic elements in environmental air particles
Technical Field
The invention relates to the field of air quality monitoring, in particular to a method and equipment for online monitoring inorganic elements in ambient air particles.
Background
Aiming at the online monitoring of inorganic elements in ambient air particles, the main technical means at present is to perform automatic enrichment through a filter membrane and then perform analysis by adopting an X-ray fluorescence spectrometry. This method has the following problems: 1. the membrane enrichment must be monitored in real time over a period of time, usually one hour. The technical precision of the X-ray fluorescence spectrometry is low, the X-ray fluorescence spectrometry is generally used as a qualitative and semi-quantitative analysis means, the detection limit is usually in the order of magnitude of mg/kg, and the measurement effect on trace elements in ambient air is poor. The inductively coupled plasma mass spectrometry is used as an analysis means with higher precision, only a manual detection method is used, and at present, a method and a device for online analyzing inorganic elements in air are unavailable.
Disclosure of Invention
In view of the above, there is a need to overcome at least one of the above-mentioned deficiencies in the prior art. The invention provides a method for on-line monitoring of inorganic elements in environmental air particles, which comprises the steps of pumping environmental air to be detected into a particle cutter by using a pump, obtaining an air sample containing particles with required particle sizes, and conveying the air sample into a gas replacement device, wherein the air in the environmental air to be detected in a channel is replaced by inert gas in the gas replacement device to form an inert gas sample to be detected containing the particles with the required particle sizes, and the inert gas sample to be detected enters an inductively coupled plasma mass spectrometer for detection and analysis of the concentration of the inorganic elements in the inert gas sample.
Further, the pump is arranged between the particle cutter and the gas replacement device, and the pump guides the ambient air to be detected to enter the particle cutter through pumping the particle cutter and enter the gas replacement device through the pump.
Further, the gas replacement device comprises a circulation pipeline passing through the ambient air to be detected and an inert gas replacement pipeline arranged outside the circulation pipeline and used for replacing inert gas with air in the circulation pipeline.
Furthermore, after the inert gas enters the inert gas replacement pipeline, replacing the air in the membrane tube and the circulating pipeline by replacing the air in the membrane tube, and finishing the replacement of the air in the circulating pipeline by the inert gas to form the inert gas sample to be detected.
Furthermore, the replacing device also comprises a shunting device for obtaining the air sample with the required flow rate. Still further, the inert gas replacement pipeline comprises a replacement inlet for inert gas inlet and a replacement outlet for inert gas outlet, and the circulating pipeline comprises an inlet for the ambient air to be measured and an outlet for the inert gas sample to be measured.
Still further, the flow conduit is a circular conduit, and the replacement conduit is a circular conduit disposed outside the flow conduit.
Further, the inert gas is argon.
Furthermore, a switching valve is arranged between the inductively coupled plasma mass spectrometer and the gas replacement device, and the other path of the switching valve is connected with a standard solution gasification device for calibrating the instrument.
Furthermore, the method also comprises a control system for controlling the whole measurement process to realize automatic operation and real-time online monitoring.
The invention also provides corresponding on-line monitoring equipment for inorganic elements in the environmental air particles, which comprises a particle cutter, a pump for guiding an environmental air sample to be detected into the particle cutter, a gas replacement device for replacing the environmental air sample to be detected with an inert gas sample through the environmental air sample to be detected, an inductively coupled plasma mass spectrometer for detecting the inert gas sample, a standard solution gasification device for calibrating the inductively coupled plasma mass spectrometer, and a switching valve for switching a calibration process and a normal monitoring process.
The whole process is briefly described as follows:
under the power action of a pump, ambient air passes through a particulate matter cutter to obtain an air sample containing particulate matters with required particle sizes, the air sample enters a gas replacement device, the air sample containing the particulate matters passes through a flow dividing device in the gas replacement device to obtain the air sample with required flow, the air sample containing the particulate matters is arranged in the gas replacement device, the air is replaced by inert gas such as argon to obtain an argon sample containing the particulate matters, and the argon sample containing the particulate matters passes through a switching valve and enters an inductively coupled plasma mass spectrometer for detection to analyze the concentration of inorganic elements in the argon sample; and the front end of the other path of the switching valve is provided with a standard solution gasification device which gasifies the standard solution into an argon sample containing standard metal particles, the argon sample enters an inductively coupled plasma mass spectrometer through the switching valve to calibrate the instrument, and the whole process controls the whole measurement flow to realize automatic operation and real-time online monitoring through a control system.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of one embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of the external structure of the gas replacement device according to the present invention;
FIG. 3 is a schematic diagram of an embodiment of the internal structure of the gas replacement device according to the present invention;
the device comprises a particle cutter 1, a gas displacement device 2, an inlet 2-1, a displacement outlet 2-2, a displacement membrane tube 2-3, a displacement inlet 2-5, an outlet 2-6, a pump 3, a flow dividing device 4, a standard solution gasification device 5, a switching valve 6, an inductively coupled plasma mass spectrometer 7, a control system 8, an air sample A containing particles and an inert gas sample B containing particles.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "lateral", "vertical", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, are used only for convenience in describing the present invention and for simplification of description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise specifically stated or limited, the terms "coupled," "communicating," "connected," "coupled," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, integrally coupled, or detachably coupled; may be communication within two elements; can be directly connected or indirectly connected through an intermediate medium; "mating" may be a surface-to-surface mating, a point-to-surface or line-to-surface mating, and also includes a hole axis mating, and it is obvious to those skilled in the art that the above terms have specific meanings in the present invention.
The method and apparatus of the present invention will now be described with reference to the accompanying drawings, in which FIG. 1 is a schematic illustration of one embodiment of the invention; FIG. 2 is a schematic diagram of an embodiment of the external structure of the gas replacement device according to the present invention;
FIG. 3 is a schematic diagram of an embodiment of the internal structure of the gas replacement device according to the present invention.
As shown in fig. 1-3, according to an embodiment of the present invention, a method for online monitoring inorganic elements in ambient air particulate matter comprises: the method comprises the steps that environmental air to be detected is pumped into a particle cutter by a pump, an air sample containing particles with required particle sizes is obtained and is conveyed into a gas replacement device, air in the environmental air to be detected in a channel is replaced by inert gas in the gas replacement device, the inert gas sample containing the particles with the required particle sizes is formed, the inert gas sample to be detected enters an inductively coupled plasma mass spectrometer for detection, and the concentration of inorganic elements in the inert gas sample is analyzed.
According to an embodiment of the invention, the pump is arranged between the particle cutter and the gas displacement device, the pump guiding the ambient air to be measured into the particle cutter by evacuating the particle cutter and through the pump into the gas displacement device.
According to an embodiment of the invention, the gas replacement device comprises a circulation pipeline passing through the ambient air to be measured and an inert gas replacement pipeline arranged outside the circulation pipeline and used for replacing inert gas with air in the circulation pipeline.
Further, after the inert gas enters the inert gas replacement pipeline, replacing the air in the membrane tube and the circulating pipeline through the replacement membrane tube, and finishing the replacement of the air in the circulating pipeline by the inert gas to form the inert gas sample to be detected.
Furthermore, the replacing device also comprises a flow dividing device for obtaining the air sample with the required flow.
Further, the inert gas replacement pipeline comprises a replacement inlet for inert gas to enter and a replacement outlet for inert gas to discharge, and the circulating pipeline comprises an inlet of the ambient air to be detected and an outlet for the inert gas sample to be detected to discharge.
Further, the circulation pipe is a circular pipe, and the replacement pipe is a circular pipe disposed outside the circulation pipe.
According to one embodiment of the invention, the inert gas is argon.
According to one embodiment of the invention, a switching valve is further arranged between the inductively coupled plasma mass spectrometer and the gas replacement device, and the other path of the switching valve is connected with a standard solution gasification device for calibrating the instrument.
According to the embodiment of the invention, the method also comprises a control system for controlling the whole measurement process to realize automatic operation and real-time online monitoring.
The invention also provides corresponding on-line monitoring equipment for inorganic elements in the environmental air particles, which comprises a particle cutter, a pump for guiding an environmental air sample to be detected into the particle cutter, a gas replacement device for replacing the environmental air sample to be detected with an inert gas sample through the environmental air sample to be detected, an inductively coupled plasma mass spectrometer for detecting the inert gas sample, a standard solution gasification device for calibrating the inductively coupled plasma mass spectrometer, and a switching valve for switching a calibration process and a normal monitoring process.
Any reference to "one embodiment," "an embodiment," "example embodiment," etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. This schematic representation in various places throughout this specification does not necessarily refer to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments.
While specific embodiments of the invention have been described in detail with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. In particular, reasonable variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the foregoing disclosure, the drawings and the appended claims without departing from the spirit of the invention. Except variations and modifications in the component parts and/or arrangements, the scope of which is defined by the appended claims and equivalents thereof.

Claims (11)

1. The method is characterized in that a pump is used for pumping environmental air to be detected into a particle cutter to obtain an air sample containing particles with required particle sizes, the air sample is conveyed into a gas replacement device, air in the environmental air to be detected in a channel is replaced by inert gas in the gas replacement device to form an inert gas sample containing the particles with the required particle sizes, and the inert gas sample to be detected enters an inductively coupled plasma mass spectrometer for detection and the concentration of inorganic elements in the inert gas sample is analyzed.
2. The method of claim 1, wherein the pump is disposed between the particle cutter and the gas displacement device, and the pump is used to pump the ambient air to be measured into the particle cutter and into the gas displacement device via the pump by evacuating the particle cutter.
3. The method for on-line monitoring inorganic elements in ambient air particulate matter according to claim 1, wherein the gas replacement device comprises a flow pipe passing through the ambient air to be detected and an inert gas replacement pipe arranged outside the flow pipe and used for replacing inert gas with air in the flow pipe.
4. The method of claim 3, wherein the inert gas is displaced by displacing air in the circulation pipeline and a membrane tube after entering the inert gas displacement pipeline, and the inert gas displaces air in the circulation pipeline to form the inert gas sample to be tested.
5. The method of claim 3, wherein the displacement device further comprises a flow divider for obtaining a desired flow rate of the air sample.
6. The method of claim 3, wherein the inert gas replacement conduit comprises a replacement inlet for inert gas inlet and a replacement outlet for inert gas outlet, and the flow conduit comprises an inlet for the ambient air to be tested and an outlet for the inert gas sample to be tested.
7. The method of claim 3, wherein the flow-through channel is a circular channel and the displacement channel is a circular channel disposed outside the flow-through channel.
8. The method of claim 1, wherein the inert gas is argon.
9. The method for on-line monitoring of inorganic elements in ambient air particulate matter as claimed in claim 1, wherein a switching valve is further disposed between the inductively coupled plasma mass spectrometer and the gas displacement device, and the other path of the switching valve is connected to a standard solution gasification device for calibrating the instrument.
10. The method for on-line monitoring of inorganic elements in ambient air particulate matter as claimed in claim 1, further comprising a control system for controlling the whole measurement process to be automatically performed and to realize real-time on-line monitoring.
11. An on-line monitoring device for inorganic elements in ambient air particles formed by the method of any one of claims 1 to 10, comprising a particle cutter, a pump for guiding an ambient air sample to be detected into the particle cutter, a gas replacement device for passing the ambient air sample to be detected and replacing the ambient air sample to be detected with an inert gas sample, an inductively coupled plasma mass spectrometer for detecting the inert gas sample, a standard solution gasification device for calibrating the inductively coupled plasma mass spectrometer, and a switching valve for switching a calibration process and a normal monitoring process.
CN202210657211.7A 2022-06-10 2022-06-10 Method for online monitoring of inorganic elements in environmental air particles Pending CN114894563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210657211.7A CN114894563A (en) 2022-06-10 2022-06-10 Method for online monitoring of inorganic elements in environmental air particles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210657211.7A CN114894563A (en) 2022-06-10 2022-06-10 Method for online monitoring of inorganic elements in environmental air particles

Publications (1)

Publication Number Publication Date
CN114894563A true CN114894563A (en) 2022-08-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210657211.7A Pending CN114894563A (en) 2022-06-10 2022-06-10 Method for online monitoring of inorganic elements in environmental air particles

Country Status (1)

Country Link
CN (1) CN114894563A (en)

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