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A method for determining the metal element mercury in soil

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

Active Publication Date: 2015-09-02
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 1 g of the treated soil sample in the bag and dissolve it with 100 ml of digestion solution 1, and dilute to 0.25 L with water;

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

[0028] where Digestion Solution 1 is HNO 3 Mixed solution with HCl, add HNO 3 The volume ratio with HCl is 1:2; where Digestion Solution 2 is HNO 3 with HClO 4 mixed solution, adding HNO 3 with HClO 4 The volume ratio is 2:1.

[0029] The above-mentioned technical scheme can meet the needs of measuring mercury in soils with different components. At the same time, compared with the existing digestion technolo...

Embodiment 2

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

[0035] Then add 100ml of digestion solution 2 to dissolve, dilute to 0.5L with water, heat to 120°C and keep the temperature for 30 minutes, then cool to room temperature, take 10ml of the treated test solution, dilute to 50ml with water as the test solution for measurement spare.

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

Embodiment 3

[0037] Example 3: Dissolve 1 g of the treated soil sample in the bag with 100 ml of digestion solution 1, and dilute to 0.25 L 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 the test solution for determination;

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

[0039] The digestion solution 1 is HNO 3 The mixing ratio of the mixed solution with HCl is 1:3; other steps are the same as in Embodiment 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 enter the human body through different routes such as the respiratory tract, skin or digestive tract. Mercury toxicity is cumulative and takes a long time to manifest. The food chain has a very strong enrichment ability for mercury. The enrichment factor for mercury is 1,000 for freshwater fish and phytoplankton, 100,000 for freshwater invertebrates, and 200,000 for marine animals. Mercury poisoning is more common in chronic form, which mainly occurs in production activities and is caused by long-term inhalation of mercury vapor and mercury compound dust. [0003] Anthropogenic emissions of mercury are the dominant factor for soil mercury enrichment. These anthropogenic emissions mainly come from (1) combustion of fuel, paper and solid waste; (2) unreasonable application of mercury-containing fertilizers and pestic...

Claims

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Application Information

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Patent Type & Authority Patents(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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