2-(1,3,4-三氮唑偶氮)-5-二乙氨基苯甲酸作为络合滴定铜指示剂的研究  

Study on 2-(1,3,4-triazolylazo)-5-diethylamino-benzoic acid as an indicator for the complexometric titration of copper

作　　者：梁华定[1] 潘富友[1] 葛昌华[1] 潘玲超[1] 

机构地区：[1]台州学院化学系,浙江台州317000

出　　处：《冶金分析》2004年第3期48-50,共3页Metallurgical Analysis

摘　　要：研究了新指示剂 2 ( 1,3 ,4 三氮唑偶氮 ) 5 二乙氨基苯甲酸 (TZDBA)作为络合滴定铜指示剂的分析性能。结果表明 ,在 pH 10 0的NH3·H2 O -NH4 Cl缓冲溶液中 ,加入 10滴指示剂TZDBA ,用EDTA溶液进行目视滴定 ,滴定终点溶液由紫色变为亮绿色 ,变色敏锐 ,准确度高 ,具有一定的实用价值 ,用于锰黄铜和铜盐中铜的测定 。triazolylazo)-5-diethylamino-benzoic acid(TZDBA) as a new indicator for the complexometric titration of copper is investigated.The results show that the end-point for the titration of copper with ten drops of the reagent is found to be sharper in the buffer solution of pH 10.0 NH 3·H 2O-NH 4Cl. The color of solution at the end point changes from voilet to light green. The method has been successfully used for the determination of copper in manganese brass and copper salts with satisfactory results.

关 键 词：锰黄铜 铜盐 三氮唑偶氮 二乙氨基苯甲酸 络合滴定 指示剂 铜 

分 类 号：O655[理学—分析化学]