EDTA络合滴定法测定硫酸钡纯度

EDTA Complexometric Titration Measurement Measuring Barium Sulfate Purity

目的 :采用EDTA配位滴定法准确快速测硫酸钡纯度并与常用的铬酸钡容量法进行对照。方法 :本文采用EDTA络合滴定法 ,以二甲酚橙 (XO) -氯化十六烷基吡啶 (CPC)混合指示剂由紫红色变为浅灰色为终点 ,对硫酸钡进行定量分析。结果 :与铬酸钡容量法对比结果良好 ,比一般采用的铬酸钡容量法、硫酸钡重量法和快速铬酸钡容量法简单易行 ,节约时间 。

Objective:To dopt EDTA complexometry veraciously quickly measure barium sulfate purity and in contrast to barium chromate volumetric procedure.Method:this article adopted EDTA complexometric titration,with xylenol orange(XO)-CPCmixed indicator changing from amaranth to French grey for termination,versus barium sulfate proceed quantitative analysis.Result:Barium chromate volumetric procedure is better than general adoptive barium chromate volumetric procedure,barium sulfate weight method and quick barium chromate volumetric procedure.It is easy,time savings,and its result is more reliable.