A dispersive liquid-liquid microextraction procedure for UV-Vis spectrophotometric determination of chromium(VI) in water samples

被引：25
|
作者：
Alexovic, Michal [1 ]
Balogh, Ioseph S. [2 ]
Skrlikova, Jana [1 ]
Andruch, Vasil [1 ]
机构：
[1] Safarik Univ, Dept Appl Chem, SK-04154 Kosice, Slovakia
[2] Coll Nyiregyhaza, Dept Chem, HU-4400 Nyiregyhaza, Hungary
来源：
ANALYTICAL METHODS | 2012年 / 4卷 / 05期
关键词：
ATOMIC-ABSORPTION-SPECTROMETRY; STRIPPING VOLTAMMETRIC DETERMINATION; EXTRACTION; COMPLEXATION; PRECONCENTRATION; SPECIATION; OPTIMIZATION; SEPARATION; REAGENT; CR(VI);
D O I：
10.1039/c2ay25133g
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A novel and simple procedure for chromium determination has been developed. The method is based on the reaction of chromium(VI) with dimethylindocarbocyanine dye reagent (DIC) in an acidic medium and in the presence of chloride ions, followed by dispersive liquid-liquid microextraction of the formed ion associate into the organic phase containing a mixture of toluene (extraction solvent), carbon tetrachloride (auxiliary solvent) and acetonitrile (dispersive solvent) in a ratio of 1 : 1 : 2 (v : v : v) and subsequent UV-VIS detection at 550 nm. The calibration plot was linear in the range 0.10-0.52 mg L-1 of chromium. The limit of detection calculated based on 3s and limit of quantification calculated based on 10s is 0.03 mg L-1 and 0.07 mg L-1. The method was applied to the determination of chromium(VI) in spiked water samples.
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页码：1410 / 1414
页数：5
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