Objective To establish an ion chromatography (1C) method for simultaneous determination of the content of five common disinfection by-products and glyphosate in drinking water.
Methods The water samples were determined after going through the OnGuard Ag/Ba/H column and 0.22 μm filter membrane; Gradient elution was achieved using an online eluent generator; The result ants were effectively separated on the IonPac AS19 column and then tested by a conductivity detector after reduction of the background value by a suppressor.
Results A Good linearity was observed for chlorite, chlorate, dichloroacetic acid, trichloroacetic acid, and glyphosate within the range of 5-200 μg/L, and for bromates within the range of 1-40 μg/L, with r ≥0.999 5; All the detection limits of the method were lower than the requirements of the current national standard in China; and the spike recovery rates were 95.3%-109%, with all the relative standard deviations less than 5%. The method could meet thus meeting the requirements for practical sample testing.
Conclusion The method is suitable for daily surveillance of drinking water due to its simple operation, good separation, and high sensitivity.
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