Determination of 11 Kinds of Halogenated Alkane Hydrocarbon in Drinking Water with Headspace Gas Chromatography / 环境与健康杂志

ABSTRACT

Objective To establish a method to determine halogenated alkane hydrocarbon in drinking water with headspace gas chromatography. Methods Halogenated alkane hydrocarbon in the water were extracted by headspace technology, then analyzed with DB-5 capillary column, in the same time, they were determined with GC by controlling the temperature and the speed of nitrogen. The retention time of the peaks was used for qualitative analysis, while external standard method was used for quantitative analysis. Results The linear ranges for dichloromethane, trichloromethane, 1, 1, 1-trichloroethane, 1, 2-dichloroethane, carbon tetrachloride, trichloroethylene, bromodichloromomethane, 1, 1, 2-trichloroethane, dibromochloromethane, tetrachloroethylene, tribromomethane were 0.8-4 024.0, 0.007-33.5, 0.004-19.2, 1.4-6 821.0, 0.002-10.0, 0.005-25.6, 0.002-12.1, 0.1-717.8, 0.005-23.5, 0.002-8.1 and 0.02-87.7 ?g/L. The lowest determination limit were 0.01- 4.1 ?g/L, the rate of recovery were 89.7%-110.0% and RSDs were 2.8%-9.0%. Conclusion This method can efficiently separate and accurately determine 11 kinds of halogenated alkane hydrocarbon in drinking water. It is simple, rapid and sensitive.