Preparation and usage method of water quality heavy metal detection agent

A technology of heavy metals and detection agents, applied in the field of analysis and detection, can solve the problems of undiscovered solid detection agents, etc., and achieve the effects of convenient transportation, high sensitivity and simple operation

Active Publication Date: 2015-05-06
上海绿帝环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, so far, no report has been found on the use of PAR color reaction to measure the solid detection agent of the mixed total amount of various heavy metals.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A water quality heavy metal detection agent is prepared.

[0019] Take by weighing 20g potassium thiocyanate, 2g potassium hydroxide and 2g polyvinylpyrrolidone respectively, after mixing them, grind them uniformly to obtain heavy metal detection powder A; then weigh 6 mg of 4-(2-pyridylazo) m-benzene Diphenol, 10g ammonium fluoride, 10g ammonium sulfate, first dissolve 4-(2-pyridylazo) resorcinol in 5ml of absolute ethanol, then mix with ammonium sulfate and ammonium fluoride, and keep the temperature at 60°C Dry in an oven for 2 hours, grind evenly after cooling, and obtain heavy metal detection powder B.

[0020] The aforementioned potassium thiocyanate, potassium hydroxide, 4-(2-pyridylazo)resorcinol, ammonium fluoride, ammonium sulfate, polyvinylpyrrolidone and absolute ethanol are commercially available analytically pure chemicals.

Embodiment 2

[0022] The heavy metal detection agent obtained in Example 1 of the present invention was used to measure the concentration of heavy metals in seawater.

[0023] In 5 test tubes each equipped with 10ml seawater, add 0.2g of the heavy metal detection powder A prepared in Example 1 respectively, after shaking and dissolving, then add 0.2g of the heavy metal detection powder B prepared in Example 1, shake and dissolve, Stand still for 10 minutes, use a spectrophotometer to measure the absorbance at a wavelength of 510nm, and substitute it into the heavy metal standard curve to calculate the heavy metal concentration. The results of the five measurements are: 0.085, 0.092, 0.095, 0.088, 0.104 mg / L, and the relative standard deviation is 8%. , which is consistent with the detection result of ICP-AES method of 0.092mg / L, therefore, the detection agent is accurate and reliable in determining the concentration of heavy metals.

Embodiment 3

[0025] The heavy metal detection agent that adopts embodiment 1 of the present invention to obtain is measured certain mining and metallurgy wastewater heavy metal

[0026] After a certain mining wastewater is filtered through filter paper, take 1.00ml into a glass test tube, add water to dilute to 10ml, add 0.2g of the heavy metal detection powder prepared in Example 1, shake to dissolve, then add 0.2g of Example 1 to prepare The heavy metal detection powder B was shaken and dissolved, and left to stand for 10 minutes. The absorbance was measured at a wavelength of 510nm by a spectrophotometer, and substituted into the heavy metal standard curve to calculate the concentration of heavy metals in the mining wastewater: 6.29mg / L, which was compared with the ICP-AES method The test result of 6.13 mg / L is basically the same. Therefore, the detection reagent is accurate and reliable in determining the total amount of heavy metals in industrial wastewater.

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PUM

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Abstract

The invention relates to a preparation and usage method of a water quality heavy metal detection agent. The preparation and usage method comprises the following steps: respectively weighing potassium hydroxide, potassium thiocyanate and polyvinylpyrrolidone at a mass ratio of (0.5-1):20:1, mixing and grinding to obtain a heavy metal detection powder I; weighing 4-(2-pyridylazo)-resorcinol, absolute ethyl alcohol, ammonium sulfate and ammonium chloride at a mass ratio of (0.02-0.1):10:100:100, dissolving 4-(2-pyridylazo)-resorcinol into absolute ethyl alcohol, evenly mixing with ammonium sulfate and ammonium chloride, drying, cooling and grinding to obtain a heavy metal detection powder II; adding 0.1-0.5g by mass of heavy metal detection powder I into 10ml a to-be-detected water sample, adding 0.2-0.8g by mass of heavy metal detection powder II after dissolution, standing for 10 minutes after dissolution, and measuring with a chromometer or a spectrophotometer, to obtain the concentration of heavy metals in the to-be-detected water sample. The preparation and usage method is high in sensitivity, the quality is stable, the carrying is convenient, the operation is simple, and the preparation and usage method is used for detecting the total amount of manganese (II), cobalt (II), nickel (II), copper (II), zinc (II), cadmium (II) and lead (II) in surface water, underground water, sea water, drinking water, industrial and agricultural water, and industrial waste water.

Description

technical field [0001] The invention relates to a method for preparing and using a water quality heavy metal detection agent, belonging to the technical field of analysis and detection. Background technique [0002] Heavy metals in water and food are toxic and harmful dangerous goods that are difficult to degrade, have poor mobility, are potentially harmful, and have long-term irreversibility. Existence in the environment will seriously affect the output and quality of drinking water and agricultural and animal husbandry products. More importantly, it can enter the human body through the biomagnification of the food chain, threatening human health. In addition to mining, battery production, non-ferrous smelting, catalysts, leather, dyes, pesticides and other fine chemical enterprises are accompanied by a large amount of heavy metal emissions. In the middle of the 20th century, bone pain caused by cadmium pollution in Toyama Prefecture, Japan, and methylmercury-contaminated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/78
Inventor 郜子涵程雨涵郜洪文
Owner 上海绿帝环保科技有限公司
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