金－硫代氨基脲络合物吸附波催化极谱测定矿石中微量金  

Au-TSC COMPLEXES ADSORPTION WAVE DETERMINATION OF MICRO-GOLD IN ORE

作　　者：宋玉珍[1] 

机构地区：[1]核工业北京化工冶金研究院

出　　处：《铀矿冶》1994年第4期260-263,共4页Uranium Mining and Metallurgy

摘　　要：在柠檬酸－溴化钾－硫代氨基脲体系中，金与硫代氨基脲形成络合物，于—０．４５Ｖ（ＶＳ．ＳＣＥ）处获得灵敏而稳定的络合物吸附波。确定的最佳底液条件是０．００５ｍｏｌ／Ｌ柠檬酸缓冲液、Ｄ．０１ｍｏｌ／Ｌ溴化钾及０．０５％硫代氨基脲。金的浓度在０．００５—５．０μｇ／ｍＬ范围内，峰高与金的浓度呈良好的直线关系。借助于二正辛基硫醚萃淋树脂富集金，分离共存杂质，用于测定矿石中微量金。对标准金矿石样品的测定结果，与标准样品定值相一致。A simple and sensitive method has been proposed for the determination of An(Ⅲ) in ore. As a result of formation of the complexes by reaction of An(Ⅲ) with thiosemicarbazide (TSC) in a suitable supporting electrolyte of 0. 005 mol/L citric acid-0. o1 mol/L KBr -0. 05% TSC, a sensitive and stabilized adsorption wave appeared with peak potentials of Au (Ⅲ) --0. 45V (vs. SCE). The height of the adsorption wave was rectilinearly related to the concentration of Au(Ⅲ) in the range of 0. 005 to 5. 0 μg/mL. The separation of Au(Ⅲ) was carried out with n-dioctyl sulphurether extractant-containing resin. The results of determination of satandurd samples correspond to their verified values with this method.

关 键 词：金 络合物吸附波 催化极谱 测定 

分 类 号：P618.51[天文地球—矿床学]