大体积直接进样离子色谱法测定饮用水中痕量溴酸盐的方法研究

目的:建立一种大体积直接进样,电导检测饮用水中痕量溴酸盐的离子色谱分析法。方法:采用Dionex ICS-2000型离子色谱仪,EGCⅡKOH淋洗液自动发生器,10 mmol/L～35 mmol/L KOH梯度淋洗,流速1.00 ml/min,DionexIonpac AS19型分析柱,DS6型热电导检测器,ASRS300阴离子抑制器,进样体积500μl等分析条件。结果:经实验得到相关系数r=0.9999,精密度RSD<2%,平均加标回收率在95.0%～107%之间,方法的最低检出限为5μg/L。结论:该方法具有操作简单、快速、灵敏度高、重现性好等优点,可应用于饮用水中痕量溴酸盐的分析测定。

Determination of trace bromate in drinking water by Large volume direct injection ion chromatography method

Objective:To establish a large volume direct injection ion chromatography method for conductivity detection of bromate in drinking water.Methods: Dionex ICS-2000 ion chromatography,EGCⅡKOH eluent generator,Dionex Ionpac AS19 analytical column,DS6 thermal conductivity detector and ASRS300 anion suppressor were involved in this method.The 10 mmol/L~35 mmol/L KOH was used for gradient elution at the flow rate of 1.00 ml/min,and the injection volume was 500 μl.Results: It was obtained from the experiment that the correlation coefficient was 0.9999,precision was RSD<2%,average recoveries were between 95.0%~107% and the minimum detection limit was 5 μg/L.Conclusion: The method has the advantages of simple operation,rapidness,high sensitivity,good reproducibility,which can be used for the analysis of trace bromate in drinking water.