Flow-injection spectrophotometric determination of vanadium with malachite green oxalate by bromate in acidic and micellar medium

被引：0
|
作者：
Mohsen Keyvanfard
Narges Abedi
机构：
[1] Islamic Azad University,Faculty of Science, Majlesi Branch
[2] Islamic Azad University,Group of Chemistry, Shahreza Branch
来源：
Rare Metals | 2011年 / 30卷
关键词：
vanadium; flow injection analysis; malachite green oxalate; spectrophotometry; micellar medium;
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摘要：
A flow injection method is proposed for determining vanadium(V). The method is based on its catalytic effect on the oxidation of malachite green oxalate by bromate. The reaction was monitored spectrophotometrically by measuring malachite green oxalate absorbance at λmax = 625 nm. The reagents and manifold variables, which have influences on the sensitivity, were investigated and the optimum conditions were established. The optimized conditions made it possible to determine vanadium in the ranges of 10–140 ng/mL with a detection limit of 5.2 ng/mL and a sample rate of 20 ± 5 samples/h.
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页码：216 / 221
页数：5
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