Determination of ten anions in drinking water by ion chromatography with large volume injection
Objective This paper aims to establish a method for the simultaneous determination of fluoride,chloride,nitrate,sulfate,bromate,chlorite,chlorate,dichloroacetic acid,trichloroacetic acid and glyphosate concentrations in drinking water by ion chromatography with large volume injection.Methods Drinking water samples were filtered through 0.22 μm filter mem-brane and mass injection of 200 μl was adopted for analysis.Gradient leaching of mobile phase KOH solution was realized by a leach generation device,and the detection effect of two different gradient leaching modes was explored.The flow rate was 1.0 ml/min,which was separated by IonPac AS19 analysis column and detected by conductivity detector.Results The corre-lation coefficients(r)were greater than 0.999 0 and the recoveries were within 90.2％-116.1％when fluoride,chloride,nitrate,sulfate and glyphosate were in the range of 0.05 mg/L-10.0 mg/L,bromate,chlorite,chlorate were in the range of 0.005 mg/L-0.2 mg/L,and dichloroacetic acid and trichloroacetic acid were in the concentrations of 0.01 mg/L-0.2 mg/L.The relative standard deviations(RSD)were all less than 2.75％(n=5).The detection limits were within 0.2 μg/L-5.3 μg/L(S/N=3).This method could effectively isolate ten anions and meet the requirements for practical sam-ple testing.Conclusion The method is simple,sensitive,and accurate.It can be used for the detection of fluoride,chloride,nitrate sulfate,bromate,chlorite,chlorate,dichloroacetic acid,trichloroacetic acid,glyphosate in drinking water.
Ion chromatographyLarge volume injectionDrinking waterAnions
NETL
NSTL
万方数据
维普
