丙醇-水体系萃取浮选铜光度法间接测定硫离子  

Indirect determination of sulfide by extraction flotation spectrophotometry of copper(Ⅱ) with propyl alcohol-water system

作　　者：苏永祥[1] 王京芳[1] 李全民[1] 刘国光[1] 

机构地区：[1]河南师范大学化学与环境科学学院河南省环境污染控制重点实验室

出　　处：《分析试验室》2007年第3期55-57,共3页Chinese Journal of Analysis Laboratory

基　　金：河南省自然科学基金(984031300);河南省创新人才工程(教高[2001]513号)项目资助

摘　　要：研究表明，Cu（Ⅱ）与S^2-形成CuS沉淀，在丙醇与水分相过程中，能被浮选于丙醇／水两相界面之间。Cu（11）浮选率与S^2-的量之间存在着良好的线性关系，据此建立了间接测定痕量S^2-的新方法，线性范围2．2×10^-8～3．2×10^-6g/mL，检出限为1．6×10^-8g/mL。常见多数阴、阳离子均不干扰测定，可用于污水与温泉水中痕量S^2-的测定。It indicates that Cu（Ⅱ ） can react with S^2- to form precipitate CuS. In the course of phase separation of propyl alcohol from water, the precipitated CuS was floated in the interface of propyl alcohol and water. There was good linear relationship between the flotation yield of Cu（ Ⅱ ） and the amount of S^2- . A novel method for the indirect determination of trace amount of S^2- was established based on the experiment. The linear range was 2.2 × 10^-8 - 3.2× 10^-8 g/mL, and the detection limit was found to be 1.6×10^-8 g/mL. The determination of S^2- was not affected by ordinary cations and anions. The method was successfully applied to the determination of S^2- in polluted water and hotspring water with satisfactory results.

关 键 词：丙醇 萃取浮选 Cu(Ⅱ) 硫离子 

分 类 号：O658.2[理学—分析化学]