Study on the Method for Determining Trihalomethanes in Drinking Water by Headspace Gas Chromatography
A method has been established for the determination of trichloromethane,dichloromethane,monochlorodibromomethane,and tribromomethane in drinking water using a headspace gas chromatograph.The mass concentrations of trichloromethane,dichloromethane,dichlorodibromomethane,and tribromomethane range from 0 to 20 μg/L,there is a linear relationship with the corresponding peak area,and the correlation coefficients are 0.999 5,0.999 9,0.999 8,and 0.999 8,The detection limits are 0.007 3μg/L,0.043 μg/L,0.004 0μg/L and 0.008 7μg/L.The minimum detection concentrations are 0.022μg/L,0.013μg/L,0.012μg/L and 0.026 μg/L.The recovery rates of trichloromethane are 92.6%to 105%,dichloromethane is 99.3%to 103%,dichloromethane is 94.2%to 101%,and tribromomethane is 97.9%to 100%.
gas chromatographydrinking water for daily usetrihalomethane
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