Organic compounds were rich in the drinking water source of Jiangsu Province.The variety of these compounds,at high concentration,easily formed total flow material with trace semivolatile organic compounds and interfered analysis in chromatographic analysis.In this paper,based on principles of a quadrupole mass spectrometry and ion trap mass spectrometry,the selective ion monitoring methods and secondary mass spectrometry monitoring methods of 54 semivolatile organic compounds were established.Selection ion...