比浊法测定含铜基体样品中的微量氯

Determination of trace-amounts of chloride ions in cupreous product by nephelomitry

本文研究了比浊法测定含铜基体样品中微量Cl^-的快速分析方法。方法液体最低检出浓度为0．2mg·L^-，固体最低检出浓度为5μg·g^-1。测定含Cl^-为0．0014％，0．0058％，0．0070％的CuSO4，CuCO3·Cu（OH）2和CuO样品，相对标准偏差分别为4．5％，3．2％，2．4％；加标回收率分别为98．2％-105．1％，98．8％～107．6％，96．4％-105．5％。

This paper studied a fast analysis method of detecting micro- amount chloride ions in cupric matrix with turbidimetry, with 0.2mg·L^-1 liguid detection limit and 5μg·g^-1 solid detection limit. As for different samples of cupric sulfate （ chloride content 0. 0014% ） and cupric carbonate basic （ chloride content 0. 0058% ） and cupric oxide （ chloride content 0.0070% ）, the respective relative standard deviation are 4.5%, 3. 2% and 2.4%. The recovery rate for the sample added with standard are 98.2%- 105.1%, 98.8%-107. 6%, and 96.4%-105.5%.