Simultaneous extraction-spectrophotometric determination of trace amounts of barium and potassium by 18-crown-6 and Orange II

被引：4

作者：

Parham, H ^{[1
]}

Pourreza, N ^{[1
]}

Attaran, A ^{[1
]}

机构：

[1] Ahwaz Univ, Fac Sci, Dept Chem, Ahvaz, Iran

来源：

ANALYTICAL LETTERS | 2000年 / 33卷 / 06期

关键词：

extraction; simultaneous determination; barium; potassium; Orange II;

D O I：

10.1080/00032710008543114

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A simple and sensitive extraction-spectrophotometric method for the determination of barium and potassium is reported. The 18C6-Barium-Orange II (18C6-Ba-(ORII)(2)) and 18C6-Potassium-Orange II (18C6-R-OR II) ternary complexes are quantitatively extracted into dichloromethane and their absorbances are measured at 483 nm. Linear calibration graphs were obtained over the barium concentration range of 0.1-5 mu g ml(-1) and potassium concentration range of 1-8 mu g ml(-1). The relative standard deviations for 2.0 mu g ml(-1) barium and potassium are, respectively, 4.16% and 3.60%. The interfering effect of a large number of diverse ions on the determination of barium and potassium was studied. The method was applied to a synthetic sample with natural matrix effects of tap water and the results showed high potential of the recommended method for the determination of Ba and K in water samples.

引用

页码：1131 / 1145

页数：15

共 28 条

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