Analysis pretreatment method for 16 polycyclic aromatic hydrocarbons in atmospheric fine particulate matters PM 2.5

A technology for atmospheric fine particles and polycyclic aromatic hydrocarbons, applied in the field of pre-analysis of polycyclic aromatic hydrocarbons, can solve the problems of large amount of organic solvent, low accuracy, low extraction efficiency, etc., achieve less organic solvent consumption and easy operation , High extraction efficiency

Inactive Publication Date: 2018-11-23
四川省疾病预防控制中心
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the above technical problems, the present invention provides a pre-analysis method for 16 kinds of polycyclic aromat

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Cut the glass fiber filter membrane for collecting atmospheric fine particulate matter PM2.5 into four equal parts, take a quarter and add the mixed standard solution with a scalar amount of 5 μg, store it overnight at 4°C, cut it into pieces, mix it with diatomaceous earth, and put it into a 5mL extraction tank, using 2mL of acetonitrile as the extraction agent, at an extraction temperature of 120°C, an extraction pressure of 1500 psi, a static extraction time of 7 min, and cyclic extraction once, N 2 The PAHs were extracted under the condition of purging for 30s, and the samples were pretreated under the same conditions. The sample and the spiked sample extract were eluted with acetonitrile and water gradients under the same analytical conditions, and were directly injected and analyzed by high performance liquid chromatography. The average spiked recovery of 16 kinds of PAHs was 96.7% (based on the PAHs spiked recovery rate to examine its extraction efficiency).

Embodiment 2

[0021] Cut the glass fiber filter membrane for collecting atmospheric fine particulate matter PM2.5 into four equal parts, take a quarter and add the mixed standard solution with a scalar amount of 5 μg, store it overnight at 4°C, cut it into pieces, mix it with diatomaceous earth, and put it into a 5mL extraction tank, using 5mL of acetonitrile as the extraction agent, at an extraction temperature of 120°C, an extraction pressure of 1500 psi, a static extraction time of 7 min, and cyclic extraction once, N 2 The PAHs were extracted under the condition of purging for 30s, and the samples were pretreated under the same conditions. Samples and spiked sample extracts were eluted with acetonitrile and water gradients under the same analytical conditions, and were directly injected by high performance liquid chromatography. The average spiked recovery of 16 PAHs was 92.9%.

Embodiment 3

[0023] Cut the glass fiber filter membrane for collecting atmospheric fine particulate matter PM2.5 into four equal parts, take a quarter and add the mixed standard solution with a scalar amount of 5 μg, store it overnight at 4°C, cut it into pieces, mix it with diatomaceous earth, and put it into a 5mL extraction pool, using 2mL of acetonitrile as the extraction agent, at an extraction temperature of 100°C, an extraction pressure of 1500 psi, a static extraction time of 7 min, and cyclic extraction once, N 2 The PAHs were extracted under the condition of purging for 30s, and the samples were pretreated under the same conditions. Samples and spiked sample extracts were eluted with gradients of acetonitrile and water under the same analytical conditions, and were directly injected and analyzed by high performance liquid chromatography. The average spiked recovery rate of 16 PAHs was 94.6%.

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Abstract

The invention provides an analysis pretreatment method for 16 polycyclic aromatic hydrocarbons in atmospheric fine particulate matters PM 2.5, and belongs to the technical field of atmospheric lastingorganic pollutant extracting method and analysis pretreatment. A quick solvent extractor is utilized, acetonitrile is adopted as an extracting solvent for extracting 16 majorant PAHs in atmospheric PM 2.5. The pretreatment method provided by the invention is high in extracting efficiency, is simple, convenient and quick to operate, is less in organic solvent dosage, is high in intelligent degree,and can meet synchronous extraction of a large batch of samples. Through acetonitrile extraction, a sample is directly introduced, and subjected to acetonitrile and water gradient elution-efficient liquid chromatography analysis; high-efficiency, quick and stable extraction effect for 16 PAHs in atmospheric PM 2.5 is guaranteed in case of causing errors and to-be-detected substance loss without aseries of operation steps such as purifying, concentration, solvent replacing and volume metering, and therefore, the method is suitable for being popularized. The method disclosed by the invention can improve accuracy of follow-up sample analysis, and has important practical significance for accurately evaluating atmospheric contamination degree and maintaining public health.

Description

technical field [0001] The invention relates to a pre-analysis method for polycyclic aromatic hydrocarbons, which belongs to the technical field of extraction methods and pre-analysis of atmospheric persistent organic pollutants, and specifically relates to a method based on rapid solvent extraction of 16 kinds of optimal control polycyclic aromatic hydrocarbons in atmospheric PM2.5. A sample pretreatment technology for direct injection analysis of cycloaromatic hydrocarbons-extract. Background technique [0002] In recent years, smog pollution has frequently occurred in many areas of our country, which is mainly formed by the smoke and water vapor released from the incomplete combustion of fossil fuels and other substances, as well as the exhaust gas emitted by industrial production. Polycyclic aromatic hydrocarbons (PAHs), as one of the most typical persistent organic pollutants, refer to hydrocarbons containing two or more benzene rings in their molecules, which exist in ...

Claims

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Application Information

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IPC IPC(8): G01N30/02G01N30/06G01N30/74
CPCG01N30/02G01N30/06G01N30/74G01N2030/062
Inventor 袁小雪刘滔雍莉杨长晓王艳游钒李杰朱岚胡彬
Owner 四川省疾病预防控制中心
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