岩矿测试2012，Vol.31Issue(3)：495-500,6.
吹扫捕集-气相色谱-质谱联用法测定地下水中27种挥发性有机物
Determination of 27 Volatile Organic Compounds in Groundwater by Gas Chromatography-Mass Spectrometry with Purge and Trap Sampling
摘要
Abstract
A method has been developed for the simultaneous detection of 27 volatile organic compounds (VOCs) including halogenated hydrocarbons, benzene series compounds and chlorinated benzenes in groundwater by Gas Chromatography-Mass Spectrometry (GC-MS) with purge and trap sampling. The double capillary columns of DB-624 and DB-FFAP were used for identifying the target compounds based on the complexity of the environmental medium and uncertainty of interference. Parameters affecting the accuracy and precision, such as separation conditions, injection mode and mass spectrometry scanning mode, were tested and optimized. The peak shape of target compounds in two different injection modes was compared and the results show that the split injection mode is significantly better than the non-split mode. The split injection with a ratio of 10:1 was selected to determine the target analytes with high sensitivity. The selected ion monitoring (SIM) scan mode improved the sensitivity of the components within the scan cycle. The double capillary columns of DB-624 and DB-FFAP were used to identify the target compounds, which ensured the accuracy for the analysis results. Meanwhile the m-xylene and p-xylene were totally separated by DB-FFAP capillary columns. The detection limits of the method for the target compounds were 0.02-0. 10 μg/L. The recovery rates were 93.3% -109.5% with RSD of 0.9% -8.5% (n =7). The method has the advantages of lower detection limits, good precision and is suitable for the determination of trace VOCs in groundwater for a large number of samples.关键词
地下水/挥发性有机物/吹扫捕集/气相色谱-质谱法Key words
groundwater/ volatile organic compounds/ purge and trap/ Gas Chromatography-Mass Spectrometry分类
天文与地球科学引用本文复制引用
刘美美,张小辉,马娅妮,李雪莹,陶秋丽..吹扫捕集-气相色谱-质谱联用法测定地下水中27种挥发性有机物[J].岩矿测试,2012,31(3):495-500,6.基金项目
中国地质大调查项目(1212010634607) （1212010634607）
