顶空固相微萃取气相色谱法测定饮水中氯酚

目的建立顶空固相微萃取(HSSPME)气相色谱法测定水中氯酚(CPs)的方法。方法采用SPME前处理技术,用毛细色谱柱分离,电子捕获检测器检测。结果2氯酚(MCP),2,4二氯酚(DCP),2,4,6三氯酚(TCP),五氯酚(PCP)的最低检出浓度分别为60.0、2.64、0.15和0.84μgL;标准曲线的相关系数分别为0.999、0.997、0.997、0.995;样品低、中、高三种浓度的加标后回收率分别为95.3%～107%、93.6%～102%、92.4%～102%、91.5%～99.1%;相对标准偏差(n=6)分别为1.0%～8.1%、1.6%～6.6%、2.9%～8.6%、2.0%～8.2%。结论该法简便、灵敏,不使用有机溶剂,是测定氯酚类化合物的理想方法。

Determination of chlorophenols in drinking water by headspace solid phase microextraction and gas chromatography

OBJECTIVE: To study the method for determination of chlorophenols in drinking water by headspace solid phase microextraction and gas chromatography. METHODS: Chlorophenols in water samples was extracted using optimized SPME technology, separated by HP-5 chromatigraphic column and the concentration of chlorophenols was determined by electron capture detector (ECD). RESULTS: The detection limit of MCP, DCP, TCP, PCP were 60.0 microg/L, 2.64 microg/L, 0.15 microg/L and 0.84 microg/L. The correlation coefficient(r) were 0.999, 0.997, 0.997, 0.995. When adding standard material of MCP, DCP, TCP, PCP at low, middle, high concentrations, the recovery rates were 95.3% - 107%, 93.6% - 102%, 92.4% - 102%, 91.5% -99.1% and the RSD (n = 6) were 1.0% - 8.1%,1.6% - 6.6%, 2.9% - 8.6%, 2.0% - 8.2%. CONCLUSION: The method was simple, sensitive and without solvent, which was an ideal method for determination of chlorophenols in drinking water.