吹扫捕集/气相色谱-质谱法测定水中59种挥发性有机物

摘要

To establish a method for simultaneously determination 59 kinds of volatile organic compounds (VOCs) in water by purge and trap with gas chromatography/mass spectrometer (GCMS).VOCs in water were enriched with purged and trap method,and then quantified by internal standard method.The recoveries of the method ranged from 94.9% to 120%,the relative standard deviations of 0.94%~4.31%,and the method detection limits (MDL) were 0.01~0.11 μg/L.The method has advantages of good separation,small interference,high sensitivity and accuracy,suitable of water sources.%建立一种吹扫捕集-气相色谱/质谱法,同时分析水样中59种挥发性有机物(VOCs).采用吹扫捕集、富集并解析挥发性有机物,用气相色谱-质谱联用仪进行测定,采用内标法定量.样品的加标回收率为94.9%~120%、相对标准偏差0.94%~4.31%、方法检出限为0.01~0.11μg/L.此方法具有分离度好、杂质影响小、灵敏度、精密度高以及适用范围广等特点.