摘要
本文提出用电生Ag^+库伦滴定岩矿样品中痕量氯的方法。经对电解液组成、不同电解电流下的电流效率、干扰元素的分离等进行了实验研究,确定了最佳分析条件。实验结果表明:当测定氯量≥100μg时,回收率达99.5～99.9％,相对标准偏差0.33～0.03％;测定氯量≥10μg,回收率为98.6～98.9％;相对标准偏差2.5～0.58%;方法准确,重现性好,操作简便。用岩石和土壤一级标准物质检验及参加建材一级标准物质协作定值,结果满意。
Trace chlorine in excess of 10μg can be accurately determined by constant-current coulometric titration with electrogenerated silver ion. A series of experiments have been carried out to find the optimum conditions. The recovery is over 98%, with a coefficient of variation 0.58-2.5%. The method has been tested with a number of reference samples with chlorine contents ranging from 0.01 to 0.57%, the obtained results compared favorably with the recommended values.
出处
《岩矿测试》
CAS
CSCD
北大核心
1990年第3期178-183,共6页
Rock and Mineral Analysis
关键词
库伦滴定法
岩石
矿物
氯
chlorine determination,coulometric titration
