巯基棉富集——催化极谱法测定高纯铜中痕量硒

Determination of Trace Selenium in High-Purity Copper by Polarographic Catalytic Wave after Enrichment and Separation with Sulfhydrl-Cotton

本文提出用巯基棉分离富集硒的方法,消除了大量铜及其他干扰元素的影响。然后用SeSO_3^(2-)-KIO_4体系催化极谱法测定高纯铜中痕量硒。检测限可达0.000020％。

A novel procedure for determination of trace selenium in high-purity copper by SeSO_3^(2-)-KIO_4 catalytic system of square wave polarography has been established.The condition of separation and determination of selenium were studied.Interferences from other elements were tested.The procedure has been successfully used to determine trace selenium more than 0.000020% in high-purity capper.The recovery for added spikes were 99.2% with coefficients of variation of 7—10%.