Determination of seven anions in drinking water by ion chromatography

To study a new method for quantitative detection of seven inorganic anions in drinking water including fluoride,chiorate,nitrite,bromate,nitrate,sulfate,phosphate at the same time.Dealing with RP column under the ion chromatography ICS-3000 with IonPac AS11A column and IonPac AG11A guard column,7 inorganic anions in water samples are determined simultaneously after filtered with 0.45 μm filter membrane.The sampling is performed at a flow rate of 1.2 mL/min,eluent is generated by eluent generator,the method of chemically suppressed conductivity detection of seven inorganic anion in drinking water is an alternative to this method.The sample is treated with direct sampling.The RSD of retention time are from 0.06% to 0.59%,the RSD of peak area are from 1.06% to 2.36% and the recoveries are from 87.6% to 105.7%,the correlation coeffidient is from 0.995 9 to 0.999 8.The method proved to be high sensitive,accurate result and simply operation.It is adapt to determinate seven inorganic anions.