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Rapid detection device for heavy metal arsenic

A detection device and heavy metal technology, applied in the direction of material analysis by observing the influence of chemical indicators, and analysis by making materials undergo chemical reactions, can solve problems such as the incidence of cancer

Inactive Publication Date: 2019-03-08
北京联绿技术集团有限公司
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  • Claims
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Problems solved by technology

Arsenic is accumulative in the human body. Long-term consumption of arsenic-contaminated food and drinking arsenic-contaminated water may lead to the incidence of cancer

Method used

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  • Rapid detection device for heavy metal arsenic

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Experimental program
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Effect test

Embodiment 1

[0037] The sludge in the river section of Lai'an County, Anhui Province in the Huaihe River Basin was used for arsenic detection. The device used included the following modules: the first pretreatment module: in this module, pentavalent arsenic was reduced to trivalent arsenic with a reducing agent under acidic conditions ; Second pretreatment module: in this module, trivalent arsenic is reduced to arsine gas with reducing agent; brown spots; and contrast analysis module: use a photometer for comparison and detection. Between the first pretreatment module and the second treatment module, a trivalent arsenic extraction module is also included, wherein the above-mentioned modified polyol (MTP) is used for extraction. The reducing agent in the first pretreatment module is vitamin C:NH 4 SCN:NaSCN=1:1:1 mixture by weight. The reducing agent in the second pretreatment module is a zinc reducing agent. The detected arsenic concentration was 0.012mg / L, exceeding the national standa...

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Abstract

The invention provides a rapid detecting device of heavy metal arsenic. The rapid detecting device comprises a first pre-treatment module, a second pre-treatment module, a color developing module and a comparative analysis module, wherein pentavalent arsenic is reduced into trivalent arsenic in the first pre-treatment module under an acidic condition by using a reducing agent; the trivalent arsenic is reduced into arsenide hydrogen gas by using a reducing agent in the second pre-treatment module; the arsenide hydrogen gas is enabled to be in contact with test paper dipped by mercury bromide in the color developing module so as to display brown color spots; the comparative analysis module is used for comparing by utilizing a photometer so as to complete detection. The rapid detecting device provided by the invention is high in sensitivity, small in error and strong in anti-jamming capability.

Description

technical field [0001] The invention belongs to the field of heavy metal detection, in particular to a rapid detection device for heavy metal arsenic, and more particularly to a device for rapid detection of heavy metal arsenic in sludge from rivers and lakes. Background technique [0002] Arsenic exists mainly in the form of sulfide in nature and is widely distributed. Industries such as fur, paint, glass and pesticides and burning arsenic mines have brought arsenic pollution to the environment. Arsenic-containing organic fertilizers, pesticides (including fungicides, insecticides, inhibitors, etc.) and arsenic-containing wastewater irrigation are all sources of arsenic pollution. Arsenic is accumulative in the human body. Long-term consumption of arsenic-contaminated food and drinking arsenic-contaminated water may lead to the incidence of cancer. Therefore, in recent years, the detection of trace element arsenic has been widely used in research fields such as food, envir...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78
CPCG01N21/78
Inventor 贺伟力程东惠梁超
Owner 北京联绿技术集团有限公司
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