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Method for detecting available lead in soil

A detection method and technology of effective state, applied in measuring devices, instruments, material analysis by optical means, etc., can solve the problems of poor accuracy and precision, complicated operation and low repeatability, and achieve high precision and operation. Simple, repeatable effects

Active Publication Date: 2017-05-31
GUANGZHOU JIANYAN ENVIRONMENTAL MONITORING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] In order to overcome the complex operation, loaded down with trivial details, poor accuracy and precision, the defect of low repeatability that the detection method of soil available state lead exists in the prior art, the object of the present invention is to provide a kind of detection method of soil available state lead, with solve the above problems

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Effect test

Embodiment 1

[0029] Embodiment 1, a kind of detection method of soil available state lead

[0030] S1 sample treatment: pass the soil through a 2mm sieve to remove impurities, take 5g of the above-mentioned soil after removing impurities, and add an alkaline solution, the alkaline solution is a potassium hydroxide solution with a mass concentration of 2%, and the amount of the alkaline solution added 2 times the weight of the soil after impurities were removed, placed under the condition of 450W microwave treatment for 10 minutes to obtain an alkaline hydrolysis solution; then add the extract to obtain a mixed solution, add citric acid solution to adjust the pH of the mixed solution to 2 Then under the condition of 850W, the power was processed for 60min, and filtered to obtain the test solution; The addition of extraction liquid is 5 times of alkaline hydrolysis solution, and described citric acid solution is the citric acid solution that mass concentration is 3%;

[0031] S2 sample dete...

Embodiment 2

[0032] Embodiment 2, a kind of detection method of soil available state lead

[0033] S1 sample treatment: pass the soil through a 3mm sieve to remove impurities, take 5g of the above-mentioned soil after removing impurities, and add an alkali solution, the alkali solution is a potassium hydroxide solution with a mass concentration of 3%, and the amount of the alkali solution added 2 times the weight of the soil after the impurities were removed, place the power under the condition of 500W and microwave for 8 minutes to obtain an alkaline solution; then add the extract to obtain a mixed solution, add citric acid solution to adjust the pH value of the mixed solution to 3, Then under the condition of 900W, the power was processed for 40min, and filtered to obtain the test solution; The addition amount of extraction liquid is 6 times of alkaline hydrolysis solution, and described citric acid solution is the citric acid solution that mass concentration is 4%;

[0034]S2 sample de...

Embodiment 3

[0035] Embodiment 3, a kind of detection method of soil available state lead

[0036] S1 sample treatment: pass the soil through a 4mm sieve to remove impurities, take 5g of the above-mentioned soil after removing impurities, and add an alkaline solution, the alkaline solution is a potassium hydroxide solution with a mass concentration of 4%, and the amount of the alkaline solution added It is 3 times of the weight of the soil after the impurity is removed, and placed under the condition of 550W microwave treatment for 5 minutes to obtain an alkaline hydrolysis solution; then add the extract to obtain a mixed solution, add citric acid solution to adjust the pH value of the mixed solution to 4, Then under the condition of 950W, the power was processed for 30min, and filtered to obtain the test solution; The addition of extraction liquid is 8 times of alkaline hydrolysis solution, and described citric acid solution is the citric acid solution that mass concentration is 5%;

[0...

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Abstract

The invention belongs to the field of environment detection and particularly relates to a method for detecting available lead in soil. The method for detecting the available lead in the soil comprises the following steps of carrying out alkaline hydrolysis treatment on a sample, then carrying out leaching extraction in an acid condition; and finally measuring by adopting a flame atomic absorption spectrometry. The extract solution comprises chitosan oligosaccharide, potassium chloride, citric acid and water. The method for detecting the available lead in soil has the advantages of high precision, good accuracy and high repeatability, has the advantages of being simple in operation and convenient to implement and is completely suitable for detection of the available lead in soil.

Description

technical field [0001] The invention belongs to the field of environmental detection, and in particular relates to a detection method of soil available lead. Background technique [0002] Soil is the carrier for the migration, retention and deposition of pollutants in the environment. The types of pollution can be divided into inorganic pollution, including heavy metals and alkalis; organic pollution, mainly artificially synthesized organic compounds; radioactive pollution. , mainly chemical fertilizer pollution and soil biological pollution. Among them, heavy metal pollution, especially lead pollution, is one of the most widely polluted and most harmful environmental problems. [0003] The effective lead in the soil refers to the part of lead that is adsorbed on the surface of the charged soil colloid in an ion state and can be absorbed and utilized by plants. When the content of effective lead in crops is low, it will not cause obvious impact on plants, and it is easy fo...

Claims

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Application Information

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IPC IPC(8): G01N21/72
CPCG01N21/72G01N2021/725
Inventor 马杜娟陈泽成黄纯琳李顺泉
Owner GUANGZHOU JIANYAN ENVIRONMENTAL MONITORING
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