SPECTROPHOTOMETRIC DETERMINATION OF CERIUM SUBGROUP RARE-EARTHS IN NICKEL-BASE ALLOYS IN THE PRESENCE OF YTTRIUM WITH P-ACETYLCHLOROPHOSPHONAZO AND MIXED SURFACTANTS

被引：6

作者：

HSU, CG

HONG, L

PAN, JM

机构：

[1] Department of Chemistry, East China Normal University, Shanghai, 200062

来源：

TALANTA | 1994年 / 41卷 / 08期

关键词：

D O I：

10.1016/0039-9140(94)E0025-M

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Rare earth elements react with p-acetylchlorophosphonazo (CPApA) to form colour complexes. In the presence of emulsifier OP and cetylpyridinium chloride (CPC), the yttrium complex is not formed because of micellar masking, while the cerium subgroup rare earths give more sensitive reactions with CPApA(epsilon(Ce) = 1.16 x 10(5) l.mol-1.cm-1) due to micellar sensitization. Most foreign ions can be tolerated in considerable amounts. The optimum conditions of the complex formation reaction and the composition of the Ce-CPApA complex are described. A simple method is proposed for the determination of cerium subgroup rare earths in nickel-base alloys with satisfactory results.

引用

页码：1357 / 1361

页数：5

共 20 条

[1]

Chernova R. K., 1977, ZH ANAL KHIM, V32, P1477

[2] REACTION OF YTTRIUM WITH PARA-NITROCHLOROPHOSPHONAZO AND THE SPECTROPHOTOMETRIC DETERMINATION OF YTTRIUM IN NICKEL-BASE ALLOYS IN THE PRESENCE OF CERIUM SUB-GROUP RARE-EARTHS [J].