Method for testing content of 16 types of polycyclic aromatic hydrocarbon content in incense combustion smoke by thermal desorption/gas chromatography-mass spectrometry

Abstract

The invention discloses a method for testing the contents of 16 types of polycyclic aromatic hydrocarbons in incense combustion smoke by a thermal desorption/gas chromatography-mass spectrometry. An incense combustion sample combusts in a space being 1.8 m*1.8 m*1.8 m; smoke is collected into a heat desorption pipe containing Tenax-TA filler through a sampling pump; after the heat desorption, GC-MS is used for detection in a selective ion mode (SIM); an external standard method is used for quantification. The result shows that the concentration of 16 types of polycyclic aromatic hydrocarbons shows a good linear relationship in a concentration range of 0.05 to 1.0 mg/L; the relative coefficient r is greater than 0.995; the method detection limit is 0.06 to 1.10 ng/m<3>; the average adding standard recovery rate is 89.2 to 100.7 percent; the relative standard deviation (RSD, n being equal to 6) is 1.7 percent to 5.0 percent. The method has the advantages that the 16 types of polycyclic aromatic hydrocarbons in the incense combustion smoke can be effectively subjected to qualitative and quantitative analysis; the characteristics of simplicity, high speed, high reliability and the likeare realized; the experiment requirements can be met.

Description

technical field [0001] The invention relates to the technical field of chemical analysis, and specifically provides a thermal desorption / gas chromatography-mass spectrometry method for determining the content of 16 kinds of polycyclic aromatic hydrocarbons in burning incense smoke. Background technique [0002] Polycyclic aromatic hydrocarbons (Polycyclic Aromatic Hydrocarbons, PAHs) are volatile hydrocarbons produced during the incomplete combustion of coal, petroleum, wood, tobacco, organic polymer compounds and other organic substances, and are important environmental and food pollutants. More than 200 kinds of PAHs have been found so far, many of which are highly carcinogenic, teratogenic and mutagenic, and also immunotoxic; long-term inhalation and exposure to smoke containing high concentrations of PAHs can lead to lung cancer , gastric cancer, skin cancer, bladder cancer, scrotum cancer and other incidence rates will increase sharply, and at the same time it will shri...

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Problems solved by technology

[0003] In addition, it has been reported that burning incense can release various air pollutants such as particulate matter, formaldehyde, benzene series and polycyclic aromatic hydrocarbons (PAHs)

The current standards for burning incense mainly include GB 26386-2011 "General Technical Conditions for Safety of Burning Incense Products" and GB / T26393-2011 "Test Methods for Hazardous Substances in Burning Incense Products", but neither of these two standards involves burning incense. Requirements for the detection of polycyclic aromatic hydrocarbons in after-smog

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