吹扫捕集/气相色谱-质谱法测定水中34种挥发性有机物的研究

Study of the Determination of 34 Kinds of Volatile Organic Compounds in Water by Gas Chromatography-mass Spectrometry with Purge and Trap Sampling

本研究建立了吹扫捕集/气相色谱-质谱法测定水中挥发性有机物(VOCs)的方法,该方法能够同时测定包括乙醛、丙烯醛、丙烯腈、松节油、吡啶等《地表水环境质量标准》中的难点项目及新污染物名录中的萘、1,2-二氯丙烷等34种VOCs。方法检出限为0.4~2.9μg/L,相对标准偏差为1.6%~9.4%,加标回收率为83.9%~114%。该方法具有精密度高、准确性好、操作简便、适用范围广等优点,大大提高了检测效率,为环境水质检测提供参考。

This study established a method to analyze volatile organic compounds(VOCs)in water by Gas Chromatography-Mass Spectrometry with purge and trap sampling(P&T/GC-MS),which could be used for the determination of 34 kinds of VOCs,such as acetaldehyde,acrylonitrile,turpentine,pyridine,naphthalene and 1,2-dichloropropane,which were the indicators in the Environmental Quality Standard for Surface Water or the catalog of emerging pollutants.The detection limits of the method were 0.4~2.9μg/L,the relative standard deviations were 1.6%~9.4%,and the recoveries of spiked samples were 83.9%~113%.This method is sensitive,accurate,simple and widely applicable,which can improve the efficiency and provide a reference for environment detection of water.