饮用水水源中半挥发性有机污染物监测方法的探讨

Methods of Monitoring Semivolatile Organic Pollutants in Drinking Water Source

江苏省饮用水水源地水质中富含有机物质,这类化合物种类多、浓度高,在色谱分析中,容易与痕量半挥发性有机毒物形成共流物,干扰分析。根据四极杆质谱检测器和离子阱质谱检测器的工作原理,建立了54种半挥发性有机物的选择性离子监测和2级质谱法监测方法,确定了选择性离子监测方法所选的离子范围,2级质谱法监测所选的母离子、CID电压,对比了选择性离子监测和2级质谱法监测的检测限。在此基础上初步建立了将两种质谱监测相结合的方法,该方法在实际样品分析中简便准确,可有效减少前处理工作。

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 ions of selective ion monitoring method were determined. Parent ions and CID voltage of secondary mass spectrometry were also determined. Detection limits of selective ion monitoring and secondary mass spectrometry monitoring were compared. A method of combining these two mass spectrometries was established. This monitoring method was simple and accurate in actual analysis of samples and could be effective in reducing pre-treatment work.