摘要
对2-(3,5-二溴-2-吡啶偶氮)-5-二乙氨基苯酚作铁(Ⅲ),铜(Ⅱ)的配位滴定指示剂进行了研究.在pH1.8～2.0时用EDTA标准溶液滴定铁(Ⅲ).在滴定铁(Ⅲ)后的溶液中,加入对铝过量的EDTA标准溶液,在pH3.8～4.0煮沸下,铝(Ⅲ)与EDTA生成稳定的络合物,过量的EDTA用硫酸铜标准溶液滴定,从而测定铝(Ⅲ).
2-(3, 5-Dibromo-2-pyridylazo)-5-diethylaminophenol as a indicator for the continuous determination of iron and copper in complexometric titration was investigated. After the end-point of the titration of iron with EDTA standard solution at pH 1.8 - 2.0, the solution was boiled at pH 3.8-4.0, then the EDTA standard solution was added, the aluminium complex was formed with EDTA. The excessive EDTA was titrated with CuSO4 standard solution. The method has been applied to the determination of Iron and aluminium in cement and clay.
出处
《分析化学》
SCIE
EI
CAS
CSCD
北大核心
1999年第9期1054-1057,共4页
Chinese Journal of Analytical Chemistry
关键词
铁
铝
EDTA
配合滴定
测定
Iron
aluminium
2 -(3
5-dibromo-2-pyridylazo)-5-diethylaminophenol
complexometric titration
