Determination of Six Anions in Drinking Water by Gradient Ion Chromatography

Six anions such as fluorinion,chloridion,bromine ion,nitrate ion,sulfate ion,phosphate ion in drinking water were simultaneously determined by ion chromatography.The sample water was filtered by membrane with diameter 0.22 μm pore.Dealing with IonPac AS19 column and IonPac AG19 guard column,six anions in water were quantitative determination by ion chromatography by using 20 mmol/L～40 mmol/L KOH generated by eluent generator at a flow rate of 0.25 mL/min.The calibration curves showed a good linearity.Detection limits of six anions ranged from 0.005 mg/L to 0.057 mg/L,RSD of detective values from 0.5% to 2.2% by parallel detection of six times.The spiked recoveries ranged from 83% to 106%.