2-(5-羧基-1,3,4-三氮唑偶氮)-5-二乙氨基酚作为络合滴定铜的指示剂的研究  

Studies on 2-(5-carboxy-1,3,4-triazolylazo)-5-diethylaminophenol as Indicator for Copper in Complexometric Titration

作　　者：梁华定[1] 潘富友[1] 葛昌华[1] 

机构地区：[1]台州学院生命科学与医药化工学院,浙江临海317000

出　　处：《台州学院学报》2004年第3期58-60,共3页Journal of Taizhou University

摘　　要：研究了新试剂 2 -(5 -羧基 -1 ,3 ,4-三氮唑偶氮 ) -5 -二乙氨基酚 (CTZAPN)作为络合滴定铜的指示剂的分析性能。结果表明 ,在 pH4.0～ 7.5范围内 ,加入 8滴指示剂CTZAPN ,用EDTA溶液进行目视滴定 ,终点由紫红色变为亮绿色 ,变色敏锐 ,准确度高 ,具有一定的实用价值 ,用于合金中铜的测定 ,结果满意。carboxy-1,3,4-triazolylazo)-5-diethylaminophenol (CTZAPN) as a new indicator for copper in complexometric titration is investigated.The result shows that the end-point of the titration of copper with the reagent is found to be more sharper at the buffer solution of pH 7.0 NH_3·H_2O—NH_4Ac and eight drops of CTZAPN.The colour at the end point is very sharp and changes from violet to light green.The method has been successfully used for the determination of copper in alloy with satisfactory results.

关 键 词：2-(5-羧基-1 3 4-三氮唑偶氮)-5-二乙氨基酚 络合滴定 铜 指示剂 PAN 表面活性剂 光度滴定曲线 

分 类 号：TQ421[化学工程]