5-Cl-DEPAP作为铜的络合滴定指示剂的研究  

Study on 2-(5-Chlorine-2-Pyridylazo)-5-diethylaminophenol as metallochromic indicator for copper

作　　者：李山[1] 刘根起[2] 

机构地区：[1]长安大学环境科学与工程学院,西安710054 [2]西北工业大学化工系,西安710072

出　　处：《分析试验室》2005年第10期77-79,共3页Chinese Journal of Analysis Laboratory

摘　　要：对5-Cl-DEPAP作为络合滴定铜的指示剂进行了研究。在pH 5.5的HAc-NaAc介质中,加入5滴5-Cl-DEPAP指示剂,以EDTA标准溶液对铜进行滴定,溶液颜色由紫红色变为黄绿色(铜量多时为绿色),终点突跃敏锐,准确度高。方法用于化学试剂和铝合金中铜的测定。An accurate and selective method for the determination of copper with 2-（5-chlorine-2-pyridylazo）-5-diethylaminophenol （5-C1-DEPAP）as an indicator of the complexometric titration is described in the medium of acetic acid-sodium acetate at pH 5.5. The end point for copper is sharp. The amounts of copper is directly proportional to EDTA solution consumed in the range of 0 - 25 mg. The method has been used for the determination of copper in chemical reagents and aluminium alloy.

关 键 词：指示剂 5-Cl-DEPAP 络合滴定 铜 

分 类 号：O555.25[理学—热学与物质分子运动论]