Pretreatment method for rapid determination of persistent organic pollutants in atmospheric particulates

A technology for atmospheric particulate matter and organic pollutants, which is applied in the preparation of test samples, measuring devices, instruments, etc., can solve the problems of labor-intensive solvent consumption, time-consuming, unfavorable for real-time detection and analysis of samples, etc. The effect of reducing and reducing measurement uncertainty

Inactive Publication Date: 2019-09-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above methods are time-consuming, labor-intensive and consume a large amount of solvent, which is not conducive to the real-time detection and analysis of samples.

Method used

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  • Pretreatment method for rapid determination of persistent organic pollutants in atmospheric particulates

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Take 1#, 2#, and 3# three empty ASE extraction pools, add 0.5g of the bimetallic composite oxide into the extraction pool, pre-extract with n-hexane and dichloromethane, and put them in the extraction pool Place in a clean sieve.

[0019] (2) Take the particle sample out of the refrigerator, place it in a desiccator for 24 hours, and then weigh it. When it reaches a constant weight, cut off 1 / 2 and weigh it. In the ASE extraction pool, another extraction pool 3# was used as the experimental blank.

[0020] (3) Add 100 μL of 31 polycyclic aromatic hydrocarbon standard solutions to the 2# extraction cell as a quality control sample to determine the recovery rate of the addition, and the addition is by weight loss method.

[0021] (4) Add 100 μL of 16 kinds of deuterated polycyclic aromatic hydrocarbon standard solutions to the above-mentioned 1#, 2#, 3# extraction pools, and then use the established analysis method to determine the recovery rate of the addition, and ...

Embodiment 2

[0023] (1) Take 1#, 2#, and 3# three empty ASE extraction pools, add 0.5g of the bimetallic composite oxide into the extraction pool, pre-extract with n-hexane and dichloromethane, and put them in the extraction pool Place in a clean sieve.

[0024] (2) Take the particle sample out of the refrigerator, place it in a desiccator for 24 hours, and then weigh it. When it reaches a constant weight, cut off 1 / 2 and weigh it. In the ASE extraction pool, another extraction pool 3# was used as the experimental blank.

[0025] (3) Add 100 μL of 27 kinds of nitro-PAH standard solutions to the 2# extraction cell as quality control samples to determine the recovery rate of the addition, and the addition adopts the weight loss method.

[0026] (4) Add 100 μL of 9 kinds of deuterated nitro polycyclic aromatic hydrocarbon standard solutions to the above-mentioned 1#, 2#, and 3# extraction pools, and then use the established analysis method to determine the recovery rate of the addition, and ...

Embodiment 3

[0028] (1) Take 1#, 2#, and 3# three empty ASE extraction pools, add 0.5g of the bimetallic composite oxide into the extraction pool, pre-extract with n-hexane and dichloromethane, and put them in the extraction pool Place in a clean sieve.

[0029] (2) Take the particle sample out of the refrigerator, place it in a desiccator for 24 hours, and then weigh it. When it reaches a constant weight, cut off 1 / 2 and weigh it. In the ASE extraction pool, another extraction pool 3# was used as the experimental blank.

[0030] (3) Add 100 μL of 11 kinds of polybrominated diphenyl ether standard solutions to the 2# extraction cell as quality control samples to determine the recovery rate of the addition, and the addition adopts the weight loss method.

[0031] (4) Add 100 μL PCB209 standard solution to the above-mentioned 1#, 2#, and 3# extraction pools, and then use the established analysis method to determine the recovery rate of the addition. The detection limit of the method is 0.3-0....

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Abstract

The invention belongs to the field of environmental organic pollutant analysis method application and particularly relates to a pretreatment process of using a bimetallic composite oxide nanomaterialwith a special shape and a large specific surface as an accelerated solvent extraction filler for determination of multiple persistent organic pollutants in an atmospheric particulate sample. According to the pretreatment process, an isotope dilution mass spectrometry method is adopted for detection, the standard recovery rate of the multiple persistent organic pollutants in the particulate sampleis within the range of 80.0-120.0%, and relative standard deviations are all within the range of 0.5-7.0%. The pretreatment analysis method is rapid, accurate and effective, meets the requirement forgreen chemistry and can be applied to routine detection of multiple types of organic matter in atmospheric particulates.

Description

technical field [0001] The invention belongs to the application field of environmental organic pollutant analysis methods, and in particular relates to the application of calcined products of double metal hydroxides with special morphology and large specific surface area in selective accelerated solvent extraction of atmospheric particulate matter samples. Background technique [0002] Atmospheric particulate matter is an important air pollutant, and organic matter is the main component of atmospheric particulate matter. Atmospheric particulate matter and the persistent organic pollutants adsorbed on it have attracted much attention because of their potential harm to health and ecology. Polycyclic aromatic hydrocarbons (PAHs) are a class of carcinogenic and teratogenic organic pollutants widely present in atmospheric particulate matter. It is an organic compound in which two or more benzene rings are connected in the form of condensed rings. NPAHs), which pose a greater thr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/34G01N30/06
CPCG01N1/34G01N30/06G01N2030/062
Inventor 李蕾叶昌俊
Owner BEIJING UNIV OF CHEM TECH
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