顶空固相微萃取气相色谱法测定水中有机氯农药及类似物

用溶胶凝胶聚甲基苯基乙烯基硅氧烷萃取探头,顶空固相微萃取与气相色谱法联用,电子捕获检测器测定湖水中的有机氯化合物,方法检出限小于35.3ng/L,相对标准偏差不大于11.8%(n=3),线性相关系数大于0.990,回收率为71.5%~115.5%。可用于水中痕量有机氯化合物的监测。

DETERMINATION OF ORGANOCHLORINE PESTICIDES AND THE SIMILAR IN WATER BY HEADSPACE SOLID-PHASE MICROEXTRACTION AND GAS CHROMATOGRAPGY

Sol-gel polymethylphenylvinylsiloxane (PMPVS) coated fiber, headspace solid-phase microextraction for the determination of organochlorine compounds in lake water by gas chromatography with electron capture detector was studied and compared with the commercial import polydimethylsiloxane fiber. Detection limits of the method were below 35.3 ng/L and relative standard deviations were not more than 11.8%(n=3). The correlation coefficients were more than 0.990, and the recoveries were 71.5%- 115.5% . The method can be applied to the monitoring of trace amount of organochlorine compounds residue in water.