Simultaneous capillary electrophoretic determination of Sc(III) and Y(III) based on the complex-formation with a lacunary Keggin-type [PW11O39]7- complex

被引：13

作者：

Himeno, Sadayuki ^{[1
]}

Kitano, Eri ^{[1
]}

Kanaya, Manabu ^{[1
]}

Takamoto, Masayo ^{[1
]}

机构：

[1] Kobe Univ, Fac Sci, Dept Chem, Kobe, Hyogo 6578501, Japan

来源：

TALANTA | 2007年 / 71卷 / 02期

关键词：

capillary electrophoresis; simultaneous determination; Sc(III); Y(III); PW11O39](7-); polyoxometalate;

D O I：

10.1016/j.talanta.2006.05.039

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Trace amounts of Sc(III) and Y(III) can react with [PW11O39](7-) to form the ternary Keggin-type complexes: [P((ScW11)-W-III)O-40](6-) and [P((YW11)-W-III)O-40](6-) having high molar absorptivities in the UV region. Since the rate of the complex-formation was very rapid and the kinetically stable ternary anions migrated in the capillary with different electrophoretic mobilities, the complex-formation reaction was applied to the simultaneous CE determination of Sc(III) and Y(III) with direct UV detection at 250 nm. For both Sc(III) and Y(III), the pre-column method provided linear calibration curves in the range of 2 x 10(-7) to 1 x 10(-5) M; the respective detection limits were 1 x 10(-7) M (the signal-to-noise ratio = 3). The proposed method was successfully applied to the determination of Sc(III) and Y(III) in river water. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：822 / 826

页数：5

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