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

ABSTRACT

Objective To establish a method for determining VOCs in drinking water by headspace gas chromatography. Methods VOCs in the water were extracted by headspace technology, then analyzed with Rtx-WAX capillary column, in the same time, VOCs was determined with GC by controlling the temperature and the speed of nitrogen. The retention time of the peaks was used for qualitative analysis, external standard method was used for quantitative analysis. Results The linear ranges of dichloromethane, benzene, toluene, 1, 2-dichloroethane, ethylbenzene, p-xylene, m-xylene, o-xylene, isopropylbenzene, chlorobenzene, styrene were 6.2-311.2, 2.0-100.0, 1.6-81.5, 5.7-282.8, 1.9-93.4, 1.7～85.4, 1.7-87.2, 2.1-103.2, 1.5-76.3, 2.2-107.3 and 1.9-96.0 ?g/L respectively. The lowest determination limit were 0.5-5.9 ?g/L, the rate of recovery were 88.8%-109.6% and RSDs were 2.2%-5.9%. Conclusion This method is simple, rapid, sensitive and can efficiently separate and accurately determine 11 kinds of VOCs in drinking water.