催化示波极谱法测定矿石中微量砷  

Catalytic Polargraphic Determination of Micro Amounts of As in Ores

作　　者：丁维德 王莉[1] Ding Weide;Wang Li

机构地区：[1]华东地质学院

出　　处：《岩矿测试》1988年第2期115-118,共4页Rock and Mineral Analysis

摘　　要：微量砷在0.24N H_(2)SO_(4)—2×10^(-5)M邻菲啰啉—0.1%硫酸钴体系中可产生一灵敏催化波。线性范围0.4~20ppb,检出下限0.05ppb,峰电位-1.25伏(VS.S.C.E)。经巯基棉分离富集,常见离子均不干扰,可适用于矿物岩石及组成较为复杂的样品中微量砷的测定。Traces of arsenic can produce sensitive catalytic waves in a system of 0.24 N sulphate-2×10^(-5) M O-phenanthroline hydrate-0.1%cobalt sulfate.A linear relationship is obtained in the range 0.4 to 20 ppb.The limit of detection is about 0.05 ppb.The peak potential is-1.25 V(VS.S.C.E).Using sulfhydryl cotton fiber for separating the coexisting ions,the method can be applied to the determination of trace of arsenic in minerals,rocks and other samples of complex matrix.

关 键 词：检出下限 催化波 巯基棉分离富集 催化示波极谱法 微量砷 砷的测定 矿物岩石 邻菲啰啉 

分 类 号：O65[理学—分析化学]