高纯硝酸钡中氯化物的测定

Determination of Chloride in High Purity Barium nitrate

介绍了采用硝酸银限量比浊法测定硝酸钡中氯化物含量的过程中,应在样品前期处理时先将硫化物除去的方法。用蒸馏水溶解硝酸钡,加入双氧水将硝酸钡中的硫化物氧化成硫酸钡沉淀,干过滤除去,避免了硝酸钡中硫离子对氯化物含量测定的干扰,解决了采用通用化工产品中氯化物的测定方法结果偏高的问题。该方法具有精密度好、准确度高等优点,用于硝酸钡中氯化物含量的测定,结果令人满意。

The determination of chloride content in high purity barium nitrate by silver nitrate turbidimetric method was introduced.The sample was dissolved by distilled water and then hydrogen peroxide was added in order to oxide the sulfide to barium sulfate precipitation which was removed through dry filter in order to avoid the interference of sulfur in the determination of chloride content and solve the problem of the higher detecting value of chloride in determintion of chloride content by general method.This method had the advantages of good precision and high accuracy,and the determination results were satisfactory.