Determination of 7 kinds of disinfection by-products,iodoacetic acid,etc.,in drinking water by ion chromatography
Objective To establish a method for the determination of 7 kinds of disinfection by-products such as iodoacetic acid in drinking water by ion chromatography(IC).Methods AS27 column was used as the analytic column,KOH gradient elution for the separation and suppressed conductivity detector for the determination.Results Chlorite and chlorate in the range of 0.07-1.40 mg/L,iodoacetic acid and diiodoacetic acid in the range of 0.002-0.04 mg/L,bromate in the range of 0.001-0.02 mg/L,dichloroacetic acid in the range of 0.005-0.10 mg/L,and trichloroacetic acid in the range of 0.01-0.20 mg/L,showed a good linear correlation.The coefficients were all greater than 0.999.The detection of limit was 0.000 3-0.007 mg/L,and the lower limit of quantification was 0.001-0.01 mg/L.The recovery rate of the test elements in tap water was 80.1％-101％,and the relative standard deviation was 0.09％-6.5％.Conclusion The method is simple,accurate,sensitive and is applicable to the the determination of 7 kinds of disinfection by-products in drinking water.
万方数据
维普
