碘量法测定三磺化三苯基膦  

Iodometric determination of TPPTS

作　　者：陈晓华[1] 谌晓玲[1] 贾绘如[1] 张华西[1] 毛震波[1] 闫龙 

机构地区：[1]西南化工研究设计院有限公司,四川成都610225 [2]辽河油田油气工程技术处化工技术开发中心,辽宁盘锦124010

出　　处：《当代化工》2016年第10期2393-2394,共2页Contemporary Chemical Industry

摘　　要：介绍一种间接碘量法测定三磺化三苯基膦的方法。向样品溶液中加入过量的碘溶液,利用碘的氧化性将三价磷氧化,再用硫代硫酸钠溶液滴定过量的碘,通过反应方程式可计算出样品中三磺化三苯基膦的含量。该方法可操作性强、简便、准确,且采用自动电位滴定仪进行测定,避免了指示剂法的显色观察误差,提高了数据的精密度。An indirect iodometry for determining the content of TPPTS was introduced. PⅢ was oxidized by iodide after adding excess iodide to the sample solution. According to the reaction equation, the content of TPPTS could be calculated by means of adding sodium hyposulfite to titrate the excess iodide. This method is simple, rapid and accurate. The precision can be improved by the automatic potentiometric titration, for avoiding the error of indicator method.

关 键 词：碘量法 三磺化三苯基膦 电位滴定 

分 类 号：O655.1[理学—分析化学]