Separation of vanadium, niobium and tantalum as ternary mixed-ligand complexes by capillary electrophoresis using chelation with 4-(2-pyridylazo) resorcinol and tartaric acid

被引：13

作者：

Liu, BF ^{[1
]}

Liu, LB ^{[1
]}

Chen, H ^{[1
]}

Cheng, JK ^{[1
]}

机构：

[1] Wuhan Univ, Dept Chem, Wuhan 430072, Peoples R China

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 2001年 / 369卷 / 02期

关键词：

D O I：

10.1007/s002160000604

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Vanadium(V), niobium(V) and tantalum(V) were separated as ternary mixed-ligand complexes by capillary electrophoresis using 4-(2-pyridylazo)resorcinol (PAR) as the color chelating reagent. Four carboxylic acids such as tartaric acid (Tart), oxalic acid, citric acid and acetic acid were investigated as the additional ligand. The first was chosen as the best. Other parameters such as the concentration ratio of Tart to PAR, buffer concentration, injection time and applied voltage were also optimized. Under the optimized conditions, a complete separation of the three metal complexes was accomplished within 10 min. A linear calibration curve in the range of two orders of magnitude was obtained.

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收藏

页码：195 / 197

页数：3

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