Method for detecting 123 polycyclic aromatic hydrocarbons in environmental medium by using gas chromatography-tandem triple quadrupole mass spectrometry

The invention relates to a method for detecting 123 polycyclic aromatic hydrocarbons in an environmental medium by using gas chromatography-tandem triple quadrupole mass spectrometry. The invention belongs to the technical field of pollutant detection. The invention aims to solve the technical problems of few types of detectable PAHs detection methods, long detection and analysis time, high detection limit and large detection result error caused by incapability of realizing isomeride separation in the detection process in the prior art. The method comprises the steps: 1, dividing 123 PAHs intothree types according to groups and control requirements; 2, single-standard sample introduction: setting mass spectrum parameters according to the determined gain voltage, qualitative ion pair and quantitative ion pair of a target object and the corresponding collision energy; 3, determining gas phase parameters through mixed standard sample introduction; 4, making a standard curve; 5, extracting and purifying PAHs in a