目的　研究应用离子色谱法测定净水剂中硫酸根的方法 ,探索该方法的实用意义。方法　离子色谱法 ,电导检测器 ,Altech阴离子分析柱。流动相 :pH1 0 ,1mmol/LNa2 CO3 及 1mmol/LNaHCO3 。流量 1 .2ml/min。结果　灵敏度 2 1 873ns·ml/mg ,检出限为 0 .0 2 2mg/L ,精密度 <7% ,相关系数 >0 .999,回收率85 .5 %～ 1 1 3%。结论　本法适用于净水剂中硫酸盐的测定 Objective To study the method of determining sulfate in purifying agent by ion chromatography and explore the practical significance of this method. Methods Ion Chromatography, Conductivity Detectors, Altech Anion Analytical Columns. Mobile phase: pH 10, 1 mmol / L Na 2 CO 3 and 1 mmol / L NaHCO 3. Flow 1.2ml / min. Results The sensitivity was 21 873 ns · ml / mg, the detection limit was 0.222 mg / L, the precision was less than 7%, the correlation coefficient was more than 0.999, the recovery was 85.5% ~ 11.3%. Conclusion This method is suitable for the determination of sulfate in purifying agent