摘要
研究了新显色剂二溴对甲基偶氮甲磺光度测定铈组稀土总量的方法。在酸性介质中,试剂与以铈组稀土为代表的稀土形成蓝色配合物,在644nm有最大吸收,铈含量在0～15μg/25ml范围内符合比耳定律。方法应用于钢铁中铈组稀土总量的直接测定,发现其准确性和重视性良好。
A spectrophotometric method for the determination of cerium subgroup rare earths with a new chromogenic reagent dibromo-p-methyl-methylsulfonazo is studied. In acid medium, cerium reacts with the reagent to form a blue complex which has an absorption maximum at 644nm. Beer' s law is obeyed for 0~15μg of cerium in 25ml solution. The method has been applied to the direct determination of cerium subgroup rare earths in steels with satisfactory accuracy and precision.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
1997年第2期61-62,共2页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
关键词
光度测定
铈组
稀土总量
钢样
显色剂
Dibromo-p-methyl-methylsulfonazo, Spectrophotometric determination, Cerium subgroup rare earths
