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Preparation method of standard substance for soil environment detection

A technology of environmental testing and reference materials, which is applied in the field of preparation of soil reference materials, can solve the problems of not meeting the needs of soil environmental pollution investigation, not being able to fully respond to soil pollution, and few soil reference materials, so as to eliminate the matrix effect and be able to Strong design and uniform effect of standard substance

Pending Publication Date: 2022-01-04
坛墨质检科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are relatively few soil standard materials that can be used uniformly throughout the country. The existing soil standard materials on the market are basically imported products, and the price is relatively expensive. Moreover, due to regional differences, they cannot fully reflect the actual situation of domestic soil pollution.
None of the substances and concentrations contained in it meet the needs of soil environmental pollution investigations

Method used

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  • Preparation method of standard substance for soil environment detection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A method for preparing a hexavalent chromium standard substance for soil environment detection, comprising the following steps:

[0018] Collect neutral or alkaline soil;

[0019] Air-dry the collected soil and pass through a 2mm sieve to remove impurities;

[0020] Weigh 60kg of ground soil and spread it on an enamel tray;

[0021] Take potassium dichromate and dissolve it in water to prepare a 1000mg / L hexavalent chromium solution;

[0022] Take 2.4L of the potassium permanganate solution prepared above, spray evenly into the soil contained in the enamel tray, and age for 1 week, stirring regularly during the aging process;

[0023] Put the obtained soil containing hexavalent chromium into an oven and dry it at 105°C for 24 hours;

[0024] The dried soil was ground to 100 mesh using a ball mill with polyurethane-lined zirconia spheres;

[0025] Pour the soil samples in all enamel trays into a double cone mixer and mix for 48 hours;

[0026] Take 10kg of product f...

Embodiment 2

[0031] A preparation method of a petroleum hydrocarbon standard substance of a soil matrix, comprising the following steps:

[0032] Collect uncontaminated soil;

[0033] Air-dry the collected soil and pass through a 2mm sieve to remove impurities;

[0034] Weigh 100kg of ground soil, divide it into 20 parts on average, and spread them on enamel trays respectively; weigh 200g of mineral oil, and dissolve it in 10L of n-hexane;

[0035] The prepared above-mentioned solution was evenly sprayed into the soil contained in the above-mentioned enamel tray in stages, aged in a fume hood for 1 week, and stirred regularly during the aging process;

[0036] The soil containing mineral oil obtained above was put into an oven and dried at 105° C. for 24 hours;

[0037] The dried soil was ground to 100 mesh using a ball mill with polyurethane-lined zirconia spheres;

[0038] Pour the soil samples in all enamel trays into a double cone mixer and mix for 48 hours;

[0039] Take 10kg of p...

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Abstract

The invention discloses a preparation method of a standard substance for soil environment detection. The method comprises the following steps: collecting representative soil according to the characteristics of soil in different regions, and air-drying and sieving to remove impurities so as to obtain a soil matrix; adding a proper target substance into the soil matrix according to detection requirements, uniformly mixing, and aging for several days; and drying, grinding, uniformly mixing, sub-packaging and fixing the value of the obtained soil containing the specific target substance. The preparation method is high in designability, soil and additives can be selected according to national standards and market requirements, the soil matrix standard substance meeting the soil environment detection quality control requirements is prepared, and the technical problem that targeted soil matrix standard substances are lacked in the current soil detection industry is solved. According to the method, mechanical mass production is adopted in the stages of drying, grinding, uniform mixing and sub-packaging, the yield and efficiency of the product can be remarkably improved, and the produced standard substance is uniform and stable.

Description

technical field [0001] The invention relates to a method for preparing a standard substance for soil environment detection, and belongs to the technical field of preparation of soil standard substances for traceability in soil environment monitoring. Background technique [0002] Soil reference materials as quality control products can provide standards for soil analysis and testing, help to check the problems existing in the soil sample analysis process, and evaluate whether the test results are reliable. However, there are relatively few soil standard materials available for national uniform use, and the existing soil standard materials on the market are basically imported products, which are relatively expensive, and because of regional differences, they cannot fully reflect the actual situation of domestic soil pollution. None of the substances and concentrations contained in it meet the needs of the investigation of soil environmental pollution. Therefore, the developm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 谢英梅洪涛方燕飞
Owner 坛墨质检科技股份有限公司