On-site automatic analysis method and instrument for inorganic arsenic form and phosphorus content in underground water

An automatic analysis, inorganic arsenic technology, applied in the direction of instruments, scientific instruments, analytical materials, etc., can solve the problems of complex manual operation, influence, and rapid analysis on site, and achieve the effect of improving stability

Inactive Publication Date: 2021-06-25
XIAMEN UNIV
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  • Claims
  • Application Information

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Problems solved by technology

The molybdenum blue method is low in cost and environmentally friendly, but the manual operation is complex and affected by the phosphate content in the substrate, which seriously affects its rapid on-site analysis

Method used

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  • On-site automatic analysis method and instrument for inorganic arsenic form and phosphorus content in underground water
  • On-site automatic analysis method and instrument for inorganic arsenic form and phosphorus content in underground water

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Embodiment Construction

[0036] The present invention will be further described below through specific embodiments. Amounts and the like not described in the examples can be conventionally selected by those skilled in the art.

[0037] The invention is used to establish working curves of trivalent arsenic, pentavalent arsenic and phosphate.

[0038] see figure 1 The on-site automatic analysis instrument for the form of inorganic arsenic and phosphorus content in groundwater described in the embodiment of the present invention is composed of a sampling module, a reaction module and a detection module connected in sequence, wherein the sampling module is composed of a syringe pump or a peristaltic pump; the reaction module includes the first A reaction device and a second reaction device, the first reaction device and the second reaction device are chambers made of polytetrafluoroethylene with a volume of 1 mL; the detection module is composed of a light source, a flow cell, and a detector connected in...

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Abstract

The invention discloses an on-site automatic analysis method and instrument for inorganic arsenic form and phosphorus content in the underground water and relates to underground water quality analysis. The instrument is formed by sequentially connecting a sample introduction module, a reaction module and a detection module, wherein the sample introduction module is composed of an injection pump or a peristaltic pump, the reaction module is composed of a first reaction device and a second reaction device, and the detection module is composed of a light source, a flow cell and a detector. For an underground water sample containing trivalent arsenic, pentavalent arsenic and phosphate, light absorption values of phosphate and pentavalent arsenic, phosphate and pentavalent arsenic, and oxidized trivalent arsenic and phosphate are respectively obtained through direct determination, determination after oxidation by adding an oxidizing agent, and determination after reduction by adding a reducing agent, and concentrations of trivalent arsenic, pentavalent arsenic and phosphate are calculated by using an interpolation method; and simultaneous measurement of multiple parameters is realized. The method can be used for on-site analysis of inorganic arsenic form and phosphate content in underground water, and has advantages of simple operation, fast analysis speed, good reproducibility and high sensitivity.

Description

technical field [0001] The invention relates to groundwater quality analysis, in particular to an on-site automatic analysis method and instrument for the form of inorganic arsenic and phosphorus content in groundwater capable of simultaneously measuring the concentrations of inorganic trivalent arsenic, pentavalent arsenic and phosphate in groundwater. Background technique [0002] Arsenic and its compounds are listed as the first class of carcinogens by the International Agency for Research on Cancer. Long-term exposure to high-arsenic environments can cause skin diseases, cardiovascular diseases, and cancer. The content of arsenic in domestic water in many countries is much higher than the interim standard value of 10 μg / L for arsenic in drinking water stipulated by the World Health Organization. The adult mortality rate is about 1 / 18. Incomplete methods lead to a huge global arsenic screening gap in water. It is estimated that the global high arsenic exposure populatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78G01N21/01
CPCG01N21/01G01N21/78G01N2021/0112
Inventor 马剑薄光永方腾越陈钊英
Owner XIAMEN UNIV
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