硝酸银容量法测定饮用水中氯化物含量优化试验

Optimization Experiment for Determination of Chloride Content in Drinking Water by Silver Nitrate Volumetric Method

本实验用硝酸银容量法和离子色谱法分别测定纯净水、矿物质水、自来水中的氯化物含量,参照GB/T5750.5-2006方法,用硝酸银容量法分别滴定至溶液呈淡桔黄色、桔黄色和桔红色,其中淡桔黄色和桔红色测定结果与离子色谱法测定结果相比偏低较多,桔红色测定结果与离子色谱法测定结果最接近,相对误差最低,重合度最高。硝酸银容量法测定饮用水氯化物含量时,以桔红色为滴定终点颜色最佳,硝酸银容量法是测定饮用水中氯化物含量的经典方法。

The experiment with silver nitrate volumetric method and ion chromatography are purified water, mineral water, tap water chloride content, with reference to GB/T5750.5-2006 method, using silver nitrate titration volumetric method to the solution were pale orange, orange and orange-red, which pale orange and more orange-red measurement result is low compared with the results of ion chromatography assay measurement results orange and ion chromatography measurement results closest Relative error minimum, the highest degree of coincidence. Conclusion: Determination of the chloride content of the silver nitrate in drinking water volumetric method to orange-red color of the titration endpoint best method is to measure the capacity of silver nitrate in drinking water chloride content of classical methods.