Ion chromatograph -double anode electrochemical hydride generation atomic fluorescent on-line combined system

Abstract

The invention relates to an ion chromatography-binode electrochemical hydride generation atomic fluorescence on-line combined system, which comprises a liquid chromatography pump, an admission valve, an ion chromatographic column, a three-way connecting device, a peristaltic pump, a binode electrochemical hydride generator, a four-way connecting device, a gas-liquid separator and an atomic fluorescence photometer. Element compounds of different forms in a sample are separated on the ion chromatographic column, the separated components are reduced to gaseous hydride on the binode electrochemical hydride generator, the gaseous hydride after undergoing gas liquid separation through the gas-liquid separator is led into the atomic fluorescence photometer by carrier gas for detection, and signals are recorded and processed by a self-developed work station. The ion chromatography-binode electrochemical hydride generation atomic fluorescence on-line combined system successfully realizes effectively converting the element compounds of different forms separated by the ion chromatographic column into hydride on line, and introduces an atomic fluorescence detection system on line, thereby establishing a simple, quick, sensitive, accurate, economical and reliable new technologic platform for element form analysis.

Description

technical field

[0001] The invention relates to a combined system of chemical analysis instruments, in particular to an online combined system of ion chromatography-double anode electrochemical hydride generation atomic fluorescence. Background technique

[0002] The toxicity and biological importance of an element depend on its chemical form. The toxicity of many elements in different forms and valence states is very different. These elements include arsenic, selenium, lead, bismuth, etc. Taking arsenic as an example, different forms of arsenic The toxicity of inorganic arsenic (including trivalent arsenic As 3+ and pentavalent arsenic As 5+ ) is the most toxic, methylated arsenic (including monomethyl arsenic MMA and dimethyl arsenic DMA) is less toxic, and arsenobetaine (AsB), arsenocholine (AsC), arsenosugar (AsS), arsenic Lipids (AsL) and the like are generally considered to be of very low or non-toxicity. Therefore, the determination of the total amount of elements ...

Examples

Embodiment Construction

[0013] As shown in Figure 1, the mobile phase 1 is delivered by the liquid chromatography pump 2, the sample to be analyzed is quantitatively injected by the injection valve 3, and the components separated by the chromatographic column 4 are sent by the cathode tee of the double anode electrochemical hydride generator. One of the inlets in the input interface 5 enters the cathode area, while the catholyte 6 is delivered to the cathode by the peristaltic pump 15. The other inlet of the three-way input interface enters the cathode area, and the anolyte 19 is delivered to the anolyte input by the peristaltic pump 20. The interface 17, 17' enters the anode area, returns to the anolyte 19 from the anolyte output interface 18, 18' for recycling or discharges to the waste liquid bottle 16, and the components after chromatographic separation are in the double anode electrochemical hydride generator The cathode area is reduced to a gaseous hydride, and the generated gaseous hydride and ...

technical field

[0001] The invention relates to a combined system of chemical analysis instruments, in particular to an online combined system of ion chromatography-double anode electrochemical hydride generation atomic fluorescence. Background technique

[0002] The toxicity and biological importance of an element depend on its chemical form. The toxicity of many elements in different forms and valence states is very different. These elements include arsenic, selenium, lead, bismuth, etc. Taking arsenic as an example, different forms of arsenic The toxicity of inorganic arsenic (including trivalent arsenic As 3+ and pentavalent arsenic As 5+ ) is the most toxic, methylated arsenic (including monomethyl arsenic MMA and dimethyl arsenic DMA) is less toxic, and arsenobetaine (AsB), arsenocholine (AsC), arsenosugar (AsS), arsenic Lipids (AsL) and the like are generally considered to be of very low or non-toxicity. Therefore, the determination of the total amount of elements ...

Examples

Embodiment Construction

[0013] As shown in Figure 1, the mobile phase 1 is delivered by the liquid chromatography pump 2, the sample to be analyzed is quantitatively injected by the injection valve 3, and the components separated by the chromatographic column 4 are sent by the cathode tee of the double anode electrochemical hydride generator. One of the inlets in the input interface 5 enters the cathode area, while the catholyte 6 is delivered to the cathode by the peristaltic pump 15. The other inlet of the three-way input interface enters the cathode area, and the anolyte 19 is delivered to the anolyte input by the peristaltic pump 20. The interface 17, 17' enters the anode area, returns to the anolyte 19 from the anolyte output interface 18, 18' for recycling or discharges to the waste liquid bottle 16, and the components after chromatographic separation are in the double anode electrochemical hydride generator The cathode area is reduced to a gaseous hydride, and the generated gaseous hydride and ...

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