摘要
研究了铈组稀土元素与三溴偶氮胂（ＴＢＡ）的显色反应，在强盐酸介质中铈组稀土元素与ＴＢＡ形成蓝紫色络合物，其最大吸收在６３５ｎｍ，铈组稀土与ＴＢＡ的络合比为１３，表观摩尔吸光系数为（１．１５～１．２５）×１０５Ｌｍｏｌ－１ｃｍ－１，在（０～２５）μｇ／５０ｍＬ范围内遵守比耳定律。这个方法已应用于直接光度测定铝合金中的铈组稀土，并获得满意结果。
In this paper,the colour reaction of the cerium subgroup of rare earth elements with tribromoarsenazo(TBA)has been studied Cerium subgroup reacts with the reagent in strong acid medium of HCl to form a blue violet complex which has a maximum absorption at 635nm and its molar ratio of Ce subgroup to TBA is 1∶3 The apparent molar absorptivity is(1 15～1 25)×10 5L·mol -1 · cm -1 Beer′s law is obeyed in (0～25)μg/50mL The method has been applied to the direct photometric determination of the Ce subgroup in aluminium alloys with satisfactory results
出处
《材料工程》
EI
CAS
CSCD
北大核心
1997年第11期31-33,共3页
Journal of Materials Engineering
关键词
三溴偶氮胂
铈组稀土元素
铝合金
直接光度法
tribromoarsenazo cerium subgroup of rare earth elements aluminium alloys
