催化极谱法快速测定高锗物料中的微量砷

Rapid determination of trace arsenic in high-content germanium materials by catalytic polarography

研究了各种高锗物料中微量砷的催化极谱分析方法 ,若试样中存在大量Pb ,Cd ,Cu 等干扰物质时 ,采用强碱分离。根据在H2 SO4 -Te -I- -As(Ⅴ )催化极谱测定体系中 ,锗无极谱活性的特点 ,不需分离锗而直接测定高锗物料中的微量砷 ,结果满意。

Different decomposition methods for high content germanium materials have been studied A large amount of interference ions such as Pb*',Cd*',Cu*' are separated by strong base Germanium is not an active element in the catalytic polarographic system of H 2SO 4-Te*$-I --As(Ⅴ),but then arsenic has a good catalytic polarographic wave The peak electricity is directly proportional to As(Ⅴ) concentration over the range of 0-30μg in 25mL of solution Recovery of adding standard is in the range of 94 6%-110 5%. The method has been applied to determine trace arsenic in high content germanium materials without separation of germanium with satisfactory results