摘要
以盐酸溶样,以氢氧化钠分离镧,加入少量抗坏血酸,控制pH 3~3.5,加入过量EDTA标准溶液,使Al^(3+)与过量的EDTA标准溶液充分络合。再用六次甲基四胺溶液调整pH为5.5~6.0,以二甲酚橙为指示剂,用Zn标准溶液返滴定过量的EDTA,差减计算得出镧铝合金中铝的含量。该方法适应于含铝30%~80%的镧铝合金中铝的测定。
The sample was dissolved with HCl.La was separated with NaOH.A small amount of Vc was used to control pH value in the range of 3 to 3.5.Enough EDTA standard solution was added to form complex with Al.Then the pH value was readjusted as 5.5 to 6.0 with C_(6)H_(12)N_(4)solution.The excessive EDTA standard solution was titrated by using zinc standard solution with C_(31)H_(32)N_(2)O_(13)as indicator.The content of Al in La-Al alloys sample was calculated by subtraction.This method is suitable for the determination of 30~80%Al in La-Al alloys sample.
作者
陆梅
LU Mei(China Rare Earth(Fu Ning)New Materials Co.,Ltd.,Yancheng 224400,China)
出处
《稀土》
CAS
CSCD
北大核心
2022年第1期142-146,共5页
Chinese Rare Earths
关键词
镧铝合金
铝
测定
La-Al alloy
Al
determination
作者简介
陆梅(1976-),女,江苏盐城人,主要从事稀土分析与湿法冶金工艺的研究,E-mail:459580007@qq.com
