含硒物料中硒的滴定分析方法研究  

The Research on Titration Analysis Method for Selenium in Selenium-bearing Material

作　　者：张祖琼 冯俊华 商仕杰 段习科 

机构地区：[1]云南铜业科技发展股份有限公司,云南昆明650106

出　　处：《云南冶金》2018年第1期73-76,共4页Yunnan Metallurgy

摘　　要：含硒物料通过硝酸溶解,硫酸冒烟,在6 mol/L盐酸体系下,用硫酸联胺沉淀硒与碲、铜、铁等杂质元素分离。分离出的硒连滤纸于烧杯中,在100~110℃的砂浴盘上溶解,以淀粉为指示剂,用硫代硫酸钠标液滴定,以测定硒的含量。该方法检测结果稳定、准确可靠。The nitric acid dissolving the selenium -bearing material, adding sulfuric acid and heating it up to fuming, under 6mol/L hydrochloric acid system, the hydrazine sulfate is used to precipitate selenium, and separate selenium from tellurium, copper, iron and the other impurity elements. Placing the isolated selenium and the filter paper into the beaker, and dissolving it on sand bath plate under 100℃ - 110℃, taking starch as the indicator, using the standard solution that sodium thiosulfate for titration to determining the content of selenium. The detection result of the method is stable, accuracy and good reliability.

关 键 词：含硒物料 滴定法 硒的测定 

分 类 号：O655.2[理学—分析化学]