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Preparation and use method of rapid detecting agent for measuring arsenic in water body

A detection agent and rapid technology, applied in the field of rapid detection of arsenic in water on site, can solve the problems of unreported and detection of trace arsenic in water, and achieve the effects of high sensitivity, convenient quantitative packaging, and simple operation

Active Publication Date: 2016-12-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the detection of trace arsenic in water under neutral or alkaline conditions, and there is no report on the rapid quantitative detection of arsenic.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1 Determination of the preparation of the detection agent of arsenic content in the water body

[0019] Weigh 3g of potassium borohydride, 1g of sodium acetate, and 0.5g of copper sulfate, and mix them uniformly to obtain arsenic detection powder Ⅰ. Weigh 1g of silver sulfate, 2g of ammonium bisulfate, 0.5g of polyvinyl alcohol, and 30g of sodium sulfate, mix them, and grind them into powder to obtain arsenic detection powder II. Weigh 5ml of phosphoric acid and 100g of potassium dihydrogen phosphate, mix well, dry at 105°C for 1 hour, and use 2-5t / cm 2 pressure, and press it into a tablet with a diameter of 8mm and a weight of 1g with a tablet machine to obtain the arsenic detection tablet III.

Embodiment 2

[0020] Embodiment 2 Determination of the preparation of the detection agent of arsenic content in the water body

[0021] Weigh 6g of sodium borohydride, 1g of sodium acetate, and 0.5g of copper sulfate, and mix them uniformly to obtain arsenic detection powder Ⅰ. Weigh 0.3g of silver sulfate, 8g of ammonium bisulfate, 0.2g of polyvinyl alcohol, and 60g of sodium sulfate, mix them, and grind them into powder to obtain arsenic detection powder II. Weigh 5ml of phosphoric acid and 40g of potassium dihydrogen phosphate, mix well, dry at 105°C for 1 hour, and use 2-5t / cm 2 pressure, and press it into a tablet with a diameter of 8mm and a weight of 1g with a tablet machine to obtain the arsenic detection tablet III.

Embodiment 3

[0022] Embodiment 3 uses the arsenic detection agent obtained in embodiment 1 of the present invention to measure the concentration of arsenic in lake water

[0023] Take 50ml of a certain river water into the generator bottle of the arsine hydrogen generator, add 0.2g of arsenic detection powder I, shake to dissolve, dissolve 0.2g of arsenic detection powder II in 5ml of Beijing Erguotou liquor (52 degrees), pour it into the arsenic hydrogen generator in the absorption tube. Add arsenic detection piece III to the generator bottle, and quickly connect the absorption tube to the generator bottle with a connecting tube. After reacting for 5 minutes, transfer the absorption solution to the colorimetric cell, measure the absorbance at a wavelength of 480nm with a spectrophotometer, and substitute it into the standard curve The calculated arsenic concentration in the river water is <0.001mg / L, which is consistent with the detection result of the national standard detection method (...

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Abstract

The invention relates to a preparation and use method of a rapid detecting agent for measuring arsenic in a water body, and belongs to the technical field of environment monitoring. The rapid detecting agent comprises arsenic detecting powder I, arsenic detecting powder II and arsenic detecting pieces III, wherein the arsenic detecting powder I is prepared by evenly mixing potassium borohydride / sodium borohydride, sodium acetate and copper sulfate according to the ratio of (5-15):2:1, the arsenic detecting powder II is prepared by evenly mixing silver sulfate, ammonium bisulfate, polyvinyl alcohol and sodium sulfate according to the ratio of (0.1-1):(2-10):(0.1-0.5):(20-80) and grinding the materials into powder, and the arsenic detecting pieces III are prepared by evenly mixing, drying and tabletting phosphoric acid and monopotassium phosphate according to the ratio of 1:(5-20). The arsenic content can be obtained by putting a to-be-detected water sample in a generation bottle of an arsenide hydrogen generation device, adding the arsenic detecting powder I, dissolving the arsenic detecting powder II in Baijiu, pouring the liquid in an absorption pipe and conducting measuring through a chromometer or spectrophotometer. The rapid detecting agent is simple in process, stable in quality and safe and convenient to carry, transport and use. The method is suitable for rapid field or site detection of trace arsenic in surface water, underground water, domestic sewage, industrial wastewater and other water bodies.

Description

technical field [0001] The invention relates to a method for quickly detecting arsenic in water on site, and belongs to the technical field of environmental monitoring. Background technique [0002] Arsenic is a common non-metallic element in nature. It is highly toxic and widely exists in soil, water, air and food. Almost all organisms contain trace amounts of arsenic. Arsenic is one of the most toxic substances discovered by people so far. It can not only cause damage to human liver and kidney function, but also damage the nerve, blood and immune system, and even cause cancer. The hazard of arsenic in our country has become a potential public health problem, and it is also a major problem of drinking water sanitation that our country urgently needs to solve in the 21st century. [0003] With the rapid development of my country's industrial technology, sudden environmental pollution accidents continue to increase, threatening human health, destroying the ecological environ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31
CPCG01N21/31
Inventor 郜洪文郜丙飞
Owner TONGJI UNIV
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