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关于稀土元素的分组测定,庄文德曾做过评述。国内发表的研究报告不多。武汉大学等单位介绍过用偶氮硝羧测定铈组稀土的方法,操作也较简单。甲基百里酚蓝(MTB)原是稀土的重要显色剂之一,近年来也有人用它测定混合稀土中的重稀土,但灵敏度不高。本文着重研究了RE-MTB络合物在加入溴化十六烷基三甲铵(CTMAB)之后引起性能的变化。实验证明,RE-MTB在加入CTMAB之后吸收光谱有明显改善,灵敏度提高一倍以上。其最大
On the determination of the grouping of rare earth elements, Zhuang Wende had made comments. Domestic published research report is not much. Wuhan University and other units introduced by azo nitrate carboxylation of cerium rare earth method, the operation is relatively simple. Methyl thymol blue (MTB) is one of the rare earth chromogenic reagent, in recent years it was also used to measure the mixed rare earth rare earth, but the sensitivity is not high. This article focuses on the changes in the properties of RE-MTB complexes caused by the addition of cetyltrimethylammonium bromide (CTMAB). Experiments show that, RE-MTB after adding CTMAB significantly improved the absorption spectrum, the sensitivity increased more than doubled. Its largest