CN219348641U - Atomizer with automatic cleaning function and liquid cathode glow discharge spectrometer - Google Patents
Atomizer with automatic cleaning function and liquid cathode glow discharge spectrometer Download PDFInfo
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- CN219348641U CN219348641U CN202223144929.0U CN202223144929U CN219348641U CN 219348641 U CN219348641 U CN 219348641U CN 202223144929 U CN202223144929 U CN 202223144929U CN 219348641 U CN219348641 U CN 219348641U
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Abstract
The utility model relates to an atomizer with an automatic cleaning function and a liquid cathode glow discharge spectrometer, belonging to the field of inspection and detection. The atomizer comprises a radiating block, a metal anode, a graphite auxiliary cathode, a sample injection quartz tube, a cleaning pipeline and a cleaning pump; the radiating block is of a reverse cone structure, a channel which is axially and radially communicated is arranged below the reverse cone, a cleaning pipeline is arranged in the channel, and a radial inlet of the cleaning pipeline is connected with the cleaning pump; the channel is axially provided with a through hole upwards, the metal anode is positioned in the through hole, and the conical end of the metal anode passes through the cleaning pipeline and is exposed outside the pipeline; a sample injection quartz tube is arranged below the cone end of the metal anode, and is nested in the graphite auxiliary cathode. Can realize the automatic cleaning of residual substances on the metal anode, the sample injection quartz tube and the graphite auxiliary cathode. The liquid cathode glow discharge spectrometer does not need any gas steel bottle, is portable, and can realize on-site analysis.
Description
Technical Field
The utility model relates to an atomizer with an automatic cleaning function and a liquid cathode glow discharge spectrometer, belonging to the field of inspection and detection.
Background
The content of calcium directly influences the quality of milk, and meanwhile, the milk is taken as an important food source for human body to ingest calcium nutrients, the sample quantity for analyzing the calcium content is huge, and the traditional laboratory method based on complex pretreatment such as digestion, ashing and the like has lower analysis efficiency, so that a rapid and on-site analysis method and instrument equipment for the calcium content in the milk are urgently needed to be established.
At present, the calcium content test in milk mainly adopts a titration method, a spectrophotometry, a flame atomic absorption spectrometry, an inductively coupled plasma-atomic emission spectrometry or an ion selective electrode method. The titration method has the defects of serious interference, insignificant end point change and the like, and low accuracy and the like; the spectrophotometry has low analysis efficiency and serious interference; the flame atomic absorption spectrometry and the ICP-AES method are used for ensuring that the calcium content in milk depends on gas cylinders such as acetylene, argon and the like, so that the analysis condition of a laboratory is more strict; the ion selective electrode method electrode treatment process is tedious and time-consuming and requires periodic maintenance or replacement. In addition, the method needs to carry out sample preparation by pretreatment means such as dry ashing or wet digestion, and is difficult to apply to on-site rapid analysis. In addition, the analysis sample amount of the milk is huge, so that the development of the technology for measuring the calcium content in the milk, which does not need a gas steel cylinder, has low analysis cost, is efficient and sensitive, and has remarkable practical value.
At present, the liquid cathode glow discharge spectrometer is only applied to the determination of the calcium content in water, but cannot be directly applied to the rapid and on-site analysis of calcium in organic matter samples rich in proteins, lipids and the like, and the samples are required to be digested, decomposed and then determined. If direct dilution sample injection is adopted, a large amount of organic matter foams such as albumin and the like are generated in the test process and are attached to the solid anode and the auxiliary graphite cathode, so that the analysis of a subsequent sample is affected. The atomizer (discharge chamber) of the existing liquid cathode glow discharge spectrometer has no automatic cleaning function.
Disclosure of Invention
In view of the above, an object of the present utility model is to provide an atomizer and a liquid cathode glow discharge spectrometer having an automatic cleaning function.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the atomizer with the automatic cleaning function comprises a radiating block, a metal anode, a graphite auxiliary cathode, a sample injection quartz tube, a cleaning pipeline and a cleaning pump;
the heat dissipation block is of a reverse cone structure, a channel which is axially and radially communicated is arranged below the reverse cone, a cleaning pipeline is arranged in the channel, and a radial inlet of the cleaning pipeline is connected with the cleaning pump;
the channel is axially provided with a through hole upwards, the metal anode is positioned in the through hole, and the tip (discharge end) of the metal anode passes through the cleaning pipeline and is exposed outside the pipeline;
a sample injection quartz tube is arranged below the tip (discharge end) of the metal anode, and is nested in the graphite auxiliary cathode;
when the cleaning liquid is used, the cleaning liquid enters the cleaning pipeline through the cleaning pump to flow from the radial direction to the axial direction, so that the lower end of the metal anode is cleaned, and the cleaning liquid flows out along the axial outlet and falls onto the sample injection quartz tube and the graphite auxiliary cathode, so that the metal anode, the sample injection quartz tube and the graphite auxiliary cathode are cleaned.
Further, the radiating block is made of brass.
Further, the upper end of the metal anode is fixed on the radiating block through jackscrews.
Further, the metal anode is a tungsten rod or a platinum rod.
Further, the cleaning pipeline is formed by connecting a radial cleaning pipeline and an axial cleaning pipeline.
Furthermore, the cleaning pipeline is made of quartz.
Further, the cleaning liquid is water or dilute acid.
The liquid cathode glow discharge spectrometer comprises the atomizer with the automatic cleaning function, a power supply, a sample injection unit to be tested, a liquid pool and a detection unit;
the metal anode and the graphite auxiliary cathode of the atomizer are respectively connected with a power supply, the graphite auxiliary cathode is positioned in the liquid pool, a sample to be detected enters a sample injection quartz tube of the atomizer from a sample injection unit to be detected and is used as a liquid cathode, and a glow discharge area is formed between the metal anode and the liquid cathode; the detection unit is used for detecting the sample to be detected.
Further, a waste liquid discharge pipeline is arranged in the liquid pool. And the waste liquid after cleaning the atomizer or the detected waste liquid is discharged through a waste liquid discharge pipeline.
Further, the detection unit includes a photodetector.
Advantageous effects
The atomizer with the automatic cleaning function provided by the utility model can realize the automatic cleaning of residual substances on the metal anode, the sample injection quartz tube and the graphite auxiliary cathode. And after each measurement is completed, the cleaning pump is automatically started, so that the electrodes can be automatically and fully cleaned, the measurement of the subsequent samples is not influenced, and the memory effect is reduced.
The liquid cathode glow discharge spectrometer provided by the utility model is suitable for detecting liquid cathode glow discharge of organic matters; under the condition of no digestion treatment, the method can be used for rapidly analyzing the element content in organic matters such as milk and the like. The liquid cathode glow discharge spectrometer does not need any gas steel bottle, is portable, and can realize on-site analysis.
Drawings
Fig. 1 is a schematic structural diagram of an atomizer with an automatic cleaning function according to an embodiment.
Fig. 2 is a schematic diagram of the structure of the liquid cathode glow discharge spectrometer described in the example.
The device comprises a 1-radiating block, a 2-metal anode, a 3-jackscrew, a 4-radial cleaning pipeline, a 5-cleaning pump, a 6-graphite auxiliary cathode, a 7-sample introduction quartz tube, an 8-axial cleaning pipeline, a 9-sample introduction unit to be tested, a 10-liquid tank and an 11-photoelectric detector.
Detailed Description
The present utility model will be described in further detail with reference to specific examples.
As shown in fig. 1, an atomizer with an automatic cleaning function comprises a heat dissipation block 1, a metal anode 2, a graphite auxiliary cathode 6, a sample introduction quartz tube 7, a cleaning pipeline and a cleaning pump 5;
the heat dissipation block 1 is of a reverse cone structure, a channel which is axially and radially communicated is arranged below the reverse cone, a cleaning pipeline is arranged in the channel, and a radial inlet of the cleaning pipeline is connected with the cleaning pump 5;
the channel is axially provided with a through hole upwards, the metal anode 2 is positioned in the through hole, and the tip (discharge) end of the metal anode 2 passes through the cleaning pipeline and is exposed outside the pipeline;
a sample injection quartz tube 7 is arranged below the cone end of the metal anode 2, and the sample injection quartz tube 7 is nested in the graphite auxiliary cathode 6;
when the cleaning liquid is used, the cleaning liquid enters the cleaning pipeline through the cleaning pump 5 to flow from the radial direction to the axial direction, so that the lower end of the metal anode 2 is cleaned, and the cleaning liquid flows out along the axial outlet and then falls onto the sample injection quartz tube 7 and the graphite auxiliary cathode 6, so that the metal anode 2, the sample injection quartz tube 7 and the graphite auxiliary cathode 6 are cleaned.
The radiating block 1 is made of brass.
The upper end of the metal anode 2 is fixed on the heat dissipation block 1 through a jackscrew 3.
The metal anode 2 is a tungsten rod or a platinum rod.
The cleaning pipeline is formed by connecting a radial cleaning pipeline 4 and an axial cleaning pipeline 8.
The cleaning pipeline is made of quartz.
The cleaning liquid is water or dilute acid.
As shown in fig. 2, a liquid cathode glow discharge spectrometer comprises an atomizer with an automatic cleaning function, a power supply, a sample injection unit 9 for a sample to be detected, a liquid pool 10 and a detection unit;
the metal anode 2 and the graphite auxiliary cathode 6 of the atomizer are respectively connected with a power supply, the graphite auxiliary cathode is positioned in a liquid pool, a sample to be detected enters a sample injection quartz tube 7 of the atomizer from a sample injection unit 9 to be detected and is used as a liquid cathode, and a glow discharge area is formed between the metal anode 2 and the liquid cathode; the detection unit is used for detecting the sample to be detected.
A waste liquid discharge pipeline is arranged in the liquid pool 10. And the waste liquid after cleaning the atomizer or the detected waste liquid is discharged through a waste liquid discharge pipeline.
The detection unit comprises a photodetector 11.
After each measurement, the cleaning pump 5 is started, cleaning liquid flows in through the radial cleaning pipeline 4, and the axial cleaning pipeline 8 plays a role in cleaning the metal anode 2, the cleaning liquid falls onto the top end of the sample injection quartz tube 7 and the auxiliary graphite electrode 6, plays a role in cleaning the discharge end of the solid anode 2, the graphite auxiliary cathode 6 and the sample injection quartz tube 7, and then enters the liquid tank 10 to be discharged as waste liquid.
Example 1
The liquid cathode glow discharge spectrometer with the automatic cleaning function atomizer is applied to the determination of the calcium content in the actual milk sample. The milk sample is diluted by 1% (V/V) dilute nitric acid for 100 times and is directly injected, and the detection limit of the method for measuring the calcium content in the milk is 35mg/L; the relative standard deviation of 6 repeated tests on the calcium content in the same milk sample is lower than 5%; for a brand of milk actual sample (the calcium content test result is 1237 mg/L), the recovery rate is between 89.0% and 109.7% at the standard concentration level of 600-1800mg/L calcium. After each sample is measured, the automatic cleaning program of the atomizer is started, the discharge anode, the graphite auxiliary cathode and the sample injection capillary are automatically cleaned, then the next sample is directly analyzed, the single sample testing time is less than 1min, and the analysis efficiency is obviously improved.
In view of the foregoing, it will be appreciated that the utility model includes but is not limited to the foregoing embodiments, any equivalent or partial modification made within the spirit and principles of the utility model.
Claims (10)
1. Atomizer with self-cleaning function, its characterized in that: comprises a heat dissipation block (1), a metal anode (2), a graphite auxiliary cathode (6), a sample injection quartz tube (7), a cleaning pipeline and a cleaning pump (5);
the heat dissipation block (1) is of a reverse cone structure, a channel which is axially and radially communicated is arranged below the reverse cone, a cleaning pipeline is arranged in the channel, and a radial inlet of the cleaning pipeline is connected with the cleaning pump (5);
the channel is axially provided with a through hole upwards, the metal anode (2) is positioned in the through hole, and the tip of the metal anode (2) passes through the cleaning pipeline and is exposed outside the pipeline;
a sample injection quartz tube (7) is arranged below the cone end of the metal anode (2), and the sample injection quartz tube (7) is nested in the graphite auxiliary cathode (6).
2. The atomizer with an automatic cleaning function according to claim 1, wherein: the radiating block (1) is made of brass.
3. The atomizer with an automatic cleaning function according to claim 1, wherein: the upper end of the metal anode (2) is fixed on the radiating block (1) through a jackscrew (3).
4. The atomizer with an automatic cleaning function according to claim 1, wherein: the metal anode (2) is a tungsten rod or a platinum rod.
5. The atomizer with an automatic cleaning function according to claim 1, wherein: the cleaning pipeline is formed by connecting a radial cleaning pipeline (4) and an axial cleaning pipeline (8).
6. The atomizer with an automatic cleaning function according to claim 5, wherein: the cleaning pipeline is made of quartz.
7. The atomizer with an automatic cleaning function according to claim 1, wherein: the cleaning liquid adopted in the cleaning is water or dilute acid.
8. The liquid cathode glow discharge spectrometer is characterized in that: comprises the atomizer with an automatic cleaning function, a power supply, a sample introduction unit (9) for a sample to be tested, a liquid tank (10) and a detection unit according to any one of claims 1 to 7;
the metal anode (2) and the graphite auxiliary cathode (6) of the atomizer are respectively connected with a power supply, the graphite auxiliary cathode is positioned in a liquid pool, a sample to be detected enters a sample introduction quartz tube (7) of the atomizer from a sample introduction unit (9) to be detected and serves as a liquid cathode, and a glow discharge area is formed between the metal anode (2) and the liquid cathode; the detection unit is used for detecting the sample to be detected.
9. A liquid cathode glow discharge spectrometer according to claim 8, wherein: a waste liquid discharge pipeline is arranged in the liquid pool (10); and the waste liquid after cleaning the atomizer or the detected waste liquid is discharged through a waste liquid discharge pipeline.
10. A liquid cathode glow discharge spectrometer according to claim 8, wherein: the detection unit comprises a photodetector (11).
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| CN202223144929.0U CN219348641U (en) | 2022-11-25 | 2022-11-25 | Atomizer with automatic cleaning function and liquid cathode glow discharge spectrometer |
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| CN202223144929.0U CN219348641U (en) | 2022-11-25 | 2022-11-25 | Atomizer with automatic cleaning function and liquid cathode glow discharge spectrometer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118566155A (en) * | 2024-08-02 | 2024-08-30 | 广州科技贸易职业学院 | Device and method for detecting aluminum pollutants in hemodialysis concentrate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118566155A (en) * | 2024-08-02 | 2024-08-30 | 广州科技贸易职业学院 | Device and method for detecting aluminum pollutants in hemodialysis concentrate |
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