Method for detecting atmosphere granule trace polychlorinated biphenyls by ion trap tandem mass spectrometry

The invention provides a method of detecting the trace polychlorinated biphenyls in atmospheric particulates by ion trap tandem mass spectrometry; the steps of the method comprises sample collection, sample leach, sample concentration and purification and the detection of pilot sample by chromatography-ion trap mass spectrometry; by optimizing the conditional parameters of gas phase chromatography and tandem mass spectrometry, the invention has better selectivity and better sensitivity in the detection of titled compound compared with the conventional detection method; the invention solves the mutual interference between PCBs and multi-chlorine organic compounds in the traditional analysis and detection method by SRM technique of gas phase chromatography/ion trap tandem mass spectrometry (GC/ITMS), and greatly simplifies the fussy steps of purification and separation in sample pretreatment; SRM technique has the advantages of sensitivity, selectivity, low detecting expense and reliable and accurate determination of the nature; therefore, the invention has remarkable advantage compared with the traditional detecting instrument such as GC/ECD,GC/LRMS,GC/HRMS.