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Method for determining polar organic compounds in atmospheric fine particulate matters

A technology for organic compounds and fine particles in the atmosphere, applied in measurement devices, instruments, scientific instruments, etc., can solve the problems of limited analytical technology, low volatility, and inability to analyze gas chromatography and mass spectrometry, and achieve the effect of clear operation ideas and labor saving.

Inactive Publication Date: 2019-09-10
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the analysis of polar organic compounds is still rare in my country. One of the important reasons is that these compounds are highly polar and less volatile, and cannot be directly analyzed by gas chromatography-mass spectrometry. This situation limits the aerosol source analysis technology in my country.

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  • Method for determining polar organic compounds in atmospheric fine particulate matters
  • Method for determining polar organic compounds in atmospheric fine particulate matters
  • Method for determining polar organic compounds in atmospheric fine particulate matters

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Embodiment Construction

[0029] The present invention is described in detail in conjunction with the accompanying drawings.

[0030] Such as figure 1 Shown, the measuring method of polar organic compound in atmospheric fine particulate matter of the present invention comprises the following steps:

[0031] (1) According to the adsorption of the filter membrane to atmospheric fine particles, cut the filter membrane sample, and dissolve the cut filter membrane sample in 2mL of dichloromethane:methanol (2:1) mixture by ultrasonic water bath (10min) in solution.

[0032] Among them, for the convenience of extraction, a hole punch with a diameter of 14mm or 16mm is generally used during the experiment. If the filter membrane is very black, you only need to cut a 14mm filter membrane; if the filter membrane is relatively clean, you can cut two 16mm filter membranes, that is, the area of ​​the cut filter membrane can roughly range from 1.54 to 4.02cm 2 between.

[0033] (2) Filter the solution obtained i...

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Abstract

The invention discloses a method for determining polar organic compounds in atmospheric fine particulate matters. In the determination method, after a PM2.5 filter membrane sample is subjected to derivatization, determination of content of each organic compound in the atmospheric fine particulate matters is executed through gas chromatography-mass spectrometry. In the method, by derivatization, the polar organic compounds in the PM2.5 filter membrane sample can be converted into nonpolar organic compounds, and the polar organic compounds can be determined more effectively in combination with GC / MS.

Description

technical field [0001] The invention relates to a method for determining polar organic compounds in organic aerosols. Background technique [0002] PM 2.5 Refers to particulate matter with an aerodynamic diameter of less than or equal to 2.5 μm, also known as fine particulate matter, whose sources and formation mechanisms are extremely complex. Small particle size, strong activity, and long residence time in the atmosphere are its remarkable characteristics, so it is easier to enrich organic pollutants, toxic heavy metals and bacteria in the environment, thus causing great harm to human health. Organic compounds are PM 2.5 An important part of PM 2.5 20% to 60% of the mass. Among them, polar substances refer to organic compounds containing polar functional groups, mainly including aliphatic, keto acids, hydroxy acids and monobasic and dibasic carboxylic acids. Dicarboxylic acids and n-alkanic acids have received more attention due to their large proportions. Dicarboxyli...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/06G01N15/00
CPCG01N15/00G01N30/02G01N30/06G01N2030/067
Inventor 曹芳吴瑕章炎麟宋文怀张艺璇
Owner NANJING UNIV OF INFORMATION SCI & TECH