顶空-气相色谱/质谱联用法测定水和废水中8种苯系物

采用顶空进样-气相色谱/质谱联用法(HS-GC/MS)测定水和废水中苯、甲苯、乙苯、对二甲苯、间二甲苯、邻二甲苯、异丙苯、苯乙烯等8种苯系物,优化了分析条件,讨论了色谱柱极性、加热温度、平衡时间和进样次数对测定结果的影响。8种苯系物在1.00μg/L～1 000μg/L范围内线性良好,方法检出限为0.22μg/L～0.38μg/L,实际样品平行测定的相对标准偏差5.0%,加标回收率在86.0%～115%之间。

Study on Determination of Benzene Hydrocarbon in Water and Wastewater by HS-GC/MS

A method of headspace gas chromatography/mass spectrometry（HS-GC/MS）was used to determine 8 kinds of benzene hydrocarbons（including benzene,toluene,ethylbenzene,p-xylene,m-xylene,o-xylene,isopropyl benzene,and styrene） in water and wastewater.Analysis processes for optimizing experimental condition were discussed such as chromatographic column polarity,oven temperature,balance time and injection times etc.The good linearity of 8 kinds of benzene hydrocarbons were obtained from 1.00μg/L to 1 000 μg/L,the method detection limits between 0.22 μg/L and 0.38 μg/L,relative standard deviation of duplicates〈5.0%,spiked recoveries between 86.0% and 115%.