A method of detecting volatile organic compounds in soil

A technology for volatile organic compounds and soil, which is applied in the direction of measuring devices, instruments, scientific instruments, etc., can solve the problems that the standard method of determination has not been established, and achieve the effect of accurate analysis of data

Inactive Publication Date: 2015-05-06
大连大公检验检测有限公司
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  • Abstract
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Problems solved by technology

There are relatively few domestic studies on volatile organic compounds in soil, and the standard method for determination has not yet been established

Method used

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Examples

Experimental program
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Embodiment 1

[0012] The method for detecting volatile organic compounds in soil is characterized in that it includes the detection of ring aromatic hydrocarbons, lipids and organochlorines. The ring aromatic hydrocarbons are detected by liquid chromatography, the esters are detected by gas chromatography, and the organochlorines Detection by gas chromatography. Pre-treatment of the soil before testing, including putting the weighed soil sample into the digestion tank, adding the extract, putting the digestion tank into the heating mantle, and putting it into the microwave extractor. Under the state of 2000-3000W, microwave 10-20min, cool for 30min, filter and dry. The extract is acetone, acetonitrile or formaldehyde. The filter is easily washed 3-5 times with sodium phosphate. The filtration also includes pickling, adding 10-15ml of concentrated sulfuric acid or concentrated hydrochloric acid into the separatory funnel to remove organic matter of fatty acids, shaking well to deflate, sta...

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Abstract

A method of detecting volatile organic compounds in soil is provided. The method is characterized in that: the method includes detection of polycyclic aromatic hydrocarbons, esters and organochlorines; the polycyclic aromatic hydrocarbons are detected by liquid chromatography; the esters are detected by adoption of GC-MS; and the organochlorines are detected by gas chromatography. Before detection, the soil is subjected to pretreatment; and the pretreatment includes adding a weighed soil sample into a digestion tank, adding an extraction liquid, putting the digestion tank into a heating jacket, and putting into a microwave-assisted extractor. The method analyzes the volatile organic compounds in the soil. According to the method, relatively more comprehensive organic compound components in the soil can be obtained, solid foundations are laid for analysis of soil organic compound components and contents by a large-scale instrument, and more comprehensive and more accurate analysis data is provided.

Description

technical field [0001] The invention relates to the technical field of soil detection, in particular to a method for detecting volatile organic compounds in soil. Background technique [0002] Volatile organic compounds usually refer to organic compounds with a boiling point of 50-260°C and a saturated vapor pressure of more than 133.132kPa at room temperature, including halogenated hydrocarbons, aromatic hydrocarbons, polycyclic aromatic hydrocarbons, etc., and are an important class of pollutants. Low-molecular-weight halogenated hydrocarbons and benzene series have been included in the environmental priority monitoring pollutants, and their toxicity is mainly manifested in their carcinogenic, mutagenic and teratogenic effects on the human body. Soil pollution by volatile organic compounds is a ubiquitous environmental problem. These organic substances mainly come from the leakage of solid waste landfills, the use of pesticides, etc. After volatile organic substances ente...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02
Inventor 关杰关宇江美玲曹卉王清
Owner 大连大公检验检测有限公司
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