Method for measuring metallic element mercury in soil

A determination method and technology for metallic mercury, which are applied in the preparation of test samples, thermal excitation analysis, material excitation analysis, etc., can solve the problem of low accuracy in the determination of metallic mercury elements.

Active Publication Date: 2013-07-10
广西益土检测技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for the determination of metallic mercury in soil with high accuracy for the above-mentioned problem of low determination accuracy of metallic mercury. The method uses an inductively coupled plasma atomic emission spectrometer to improve the measurement Accuracy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: Take 1g of the treated soil sample in the bag and dissolve it with 100ml of digestion solution 1, and dilute to 0.25L with water;

[0027] Heat to 100°C and keep this temperature for 30 minutes and then cool to room temperature; then add 100ml of Digestion Solution 2 to dissolve it, dilute to 0.5L with water, heat to 120°C and keep this temperature for 30 minutes, then cool to room temperature, and take it after cooling to room temperature 10ml of the treated test solution, dilute to 50ml with water as the test solution for determination.

[0028] The digestion solution 1 is HNO 3 Mixed solution with HCl, add HNO 3 The volume ratio with HCl is 1:2; the digestion solution 2 is HNO 3 With HClO 4 Mixed solution, add HNO 3 With HClO 4 The volume ratio is 2:1.

[0029] The above technical solution can meet the needs of measuring mercury in a variety of soils with different components. At the same time, compared with the existing digestion technology, the operation is sim...

Embodiment 2

[0034] Example 2: Take 1g of the treated soil sample in the bag and dissolve it with 100ml of Digestion Solution 1, and dilute it to 0.25L with water; heat to 80°C for 30 minutes and then cool to room temperature;

[0035] Then add 100ml of Digestion Solution 2 to dissolve it, make the volume up to 0.5L with water, heat it to 120°C and keep it at this temperature for 30 minutes and then cool to room temperature. Take 10ml of the treated test solution and make the volume up to 50ml with water as the test solution for measurement. spare.

[0036] The other steps are the same as in Example 1.

Embodiment 3

[0037] Example 3: Take 1g of the treated soil sample in the bag and dissolve it with 100ml of Digestion Solution 1, and dilute it to 0.25L with water; heat to 100°C and keep the temperature for 30 minutes, then cool to room temperature and take the treated test solution 10ml, dilute to 50ml with water as a test solution for determination;

[0038] Then add 100ml of digestion solution 2 to dissolve, make the volume up to 0.5L with water, heat to 140°C and maintain the temperature for 30 minutes and then cool to room temperature.

[0039] The digestion solution 1 is HNO 3 The mixing ratio of the mixed solution with the mixed solution of HCl is: 1:3; the other steps are the same as in implementation 1.

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PUM

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Abstract

The invention discloses a method for measuring metallic element mercury in soil. The method comprises the steps of pre-treating a sample, drawing a solution working curve and measuring, wherein the pre-treating step comprises digesting various soil samples through an acid and treating the soil samples at high temperature to form a solution to be measured; and meanwhile, the measuring step comprises measuring the metallic element mercury through inductive coupling plasma atom emission spectrography, and selecting proper working parameters to quickly obtain the content of mercury in the test sample. The solution pre-treatment step in the measuring method is simple and economical; the measuring process is simple, the linear range is wide, and the operation is simple and quick; and meanwhile, the interference of different elements in the soil can be avoided during the measuring process.

Description

Technical field [0001] The invention relates to a method for determining mercury metal in a sample. Background technique [0002] Mercury and its compounds can invade the human body through different ways such as the respiratory tract, skin or digestive tract. The toxicity of mercury is accumulated and takes a long time to manifest. The food chain has a strong ability to accumulate mercury. Freshwater fish and phytoplankton have an enrichment ratio of 1,000, freshwater invertebrates 100,000, and marine animals 200,000. Chronic mercury poisoning is more common. It mainly occurs in production activities and is caused by long-term inhalation of mercury vapor and mercury compound dust. [0003] The anthropogenic emission of mercury is the leading factor in the richness of mercury in the soil. These anthropogenic emissions mainly come from (1) the burning of fuel, paper and solid waste; (2) the unreasonable application of mercury-containing fertilizers and pesticides in agricultural ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71G01N1/44
Inventor 傅酉付玉生
Owner 广西益土检测技术有限公司
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