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Pretreatment method for various organic pollutants in solid medium

A technology of organic pollutants and medium, which is applied in the field of pretreatment of organic pollutants to achieve the effects of saving time, high comparability and less dosage

Active Publication Date: 2016-08-31
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the problems described above

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  • Pretreatment method for various organic pollutants in solid medium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] After the soil is fully ground, take 3g and extract it with an accelerated solvent extraction machine to obtain a blank soil. Add 1ml of a standard sample to the soil after the organic matter has been extracted. The standard sample contains PCBs (100ppb), PAHs (100ppb), DDT (100ppb) , wax esters (100ppb), alkylphenols (100ppb), NPEO (100ppb), phthalates (100ppb), estradiol (100ppb) and other components. After fully mixing, put it into the refrigerator as a simulated analysis sample, and perform the following treatments on the simulated analysis sample:

[0046] 1S preparation of analysis samples: thaw the frozen simulated soil sample at room temperature, then freeze-dry on a freeze dryer, grind or pulverize the dried sample, and pass through a 240-mesh stainless steel sieve;

[0047] 2S extraction of organic pollutants: wash the extraction pool of the accelerated solvent instrument (ASE 300, Dionex U.S.A) with n-hexane, dichloromethane, and methanol three times respecti...

Embodiment 2

[0052] After the sediment (bottom mud) is fully ground, take 2g and extract it with an accelerated solvent extraction machine to obtain a blank bottom mud. Add 1ml of a standard sample to the bottom mud after the organic matter has been extracted. This standard sample contains PCBs (100ppb), DDE ( 100ppb), PAHs (100ppb), DDD (100ppb), wax esters (100ppb), alkylphenols (100ppb), NPEO (100ppb), phthalates (100ppb), bisphenol A (100ppb) and other groups point. After fully mixing, put it into the refrigerator as a simulated analysis sample, and carry out the treatment similar to that in Example 1 to the simulated analysis sample.

[0053] Step 1S and Step 2S adopt the processing method in Embodiment 1.

[0054] 3S Preparation of Chromatographic Column: The silica gel / alumina composite chromatographic column is packed by wet packing method. The inner diameter of the chromatographic column is 10mm. The chromatographic column is anhydrous sodium sulfate layer, alumina layer and sili...

Embodiment 3

[0058] After the soil is fully ground, take 3g and extract it with an accelerated solvent extraction machine to obtain a blank bottom mud. Add 1ml of a standard sample to the bottom mud after the organic matter has been extracted. The standard sample contains PCBs (100ppb), DDE (100ppb), PAHs ( 100ppb), DDT (100ppb), DDD (100ppb), wax esters (100ppb), alkylphenols (100ppb), NPEO (100ppb), phthalates (100ppb), bisphenol A (100ppb), estrogen Phenol ketone (100ppb) and other components. After fully mixing, put it into the refrigerator as a simulated analysis sample, and carry out the treatment similar to that in Example 1 to the simulated analysis sample.

[0059] Step 1S and Step 2S adopt the processing method in Embodiment 1.

[0060] 3S Preparation of Chromatographic Column: The silica gel / alumina composite chromatography column is packed by wet packing method. The inner diameter of the chromatography column is 16mm. The chromatography column is composed of anhydrous sodium s...

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Abstract

The invention discloses a pretreatment method for various organic pollutants in a solid medium. The pretreatment method comprises the following steps: preparing an analysis sample; extracting the organic pollutants; preparing a chromatographic column; gradually separating the organic pollutants. According to the method, a silica gel / aluminum oxide compound column is used for separating the organic pollutants, seven eluents with gradually increased polarities are used for continuously eluting and then the organic pollutants with polarity difference are gradually separated. According to the method, the mode of uniform extracting and same column separation is applied to various organic pollutants and the organic pollutants with polarity difference are divided into seven groups, so that the convenience in subsequent analysis determination is supplied, the dosage of the organic solvent in the extracting and separating process is greatly reduced and the method is more economic and environmentally friendly.

Description

technical field [0001] The invention relates to a pretreatment method for organic pollutants, in particular to a pretreatment method for various organic pollutants in a solid medium. Background technique [0002] According to reports, there are currently about 10,000 kinds of toxic chemicals entering the environment, and there are thousands of carcinogenic, teratogenic and mutagenic chemical substances. The chemical pollutants in the environment are mainly organic pollutants. In environmental testing, my country A preliminary control of 68 priority pollutants was proposed, of which 58 are organic pollutants, which have the characteristics of low concentration and high toxicity. In order to understand the migration and transformation of organic pollutants in the environment, the accumulation and biological effects in the human body and organisms, the relationship between toxicity, activity and structure, and the level of degradation residues, it is necessary to analyze and mea...

Claims

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Application Information

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IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 张依章张远马瑾凌郡鸿李琳琳
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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