阳离子艳蓝作为沉淀滴定指示剂的研究  

Study on the Basic Blue as the Indicator for Precipitation Titration

作　　者：贾忠明[1] 茹雪姣[1] 王永飞[1] 邹京[1] 

机构地区：[1]长治学院化学系,山西长治046011

出　　处：《分析科学学报》2007年第5期619-620,共2页Journal of Analytical Science

摘　　要：本文采用阳离子艳蓝2RL作为滴定I^-、Br^-离子的吸附指示剂，当滴定的pH值范围为3．5～5．2，温度为60℃时，终点颜色由蓝色迅速变为无色，滴定I^-、Br^-离子的误差分别为0．09％、0．34％。In this paper, it was found that the basic blue 2RL can be used as the absorption indicator of titration for I^- and Br^-. With titration acidity of pH 3.5-5.2, temperature of about 60℃, the solution turned quickly colorless from blue at the end point, titration error is 0. 09% for I^- and 0. 34% for Br^-, respectively. This result demonstrated that basic blue could be a new indicator for precipitation titration.

关 键 词：沉淀滴定法 吸附指示剂 阳离子艳蓝 

分 类 号：O655.2[理学—分析化学]