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CATALYTIC SPECTROPHOTOMETRIC DETERMINATION OF VANADIUM (IV) BASED ON THE OXIDATION OF ALKALI BLUE BY POTASSIUM BROMATE | ||
| Iranian Journal of Science | ||
| مقاله 2، دوره 31، شماره 3، اسفند 2007، صفحه 231-239 اصل مقاله (177.87 K) | ||
| نوع مقاله: Regular Paper | ||
| شناسه دیجیتال (DOI): 10.22099/ijsts.2007.2339 | ||
| نویسندگان | ||
| A. ABBASPOUR* ؛ S. M. M. MOOSAVI؛ R. MIRZAJANI | ||
| Department of Chemistry, College of Science, Shiraz University, Shiraz 71454, I. R. of Iran | ||
| چکیده | ||
| A simple, rapid and sensitive spectrophotometric method has been proposed for the determination of Vanadium (IV). The method is based on the catalytic effect of V (IV) on the oxidation of Alkali Blue by potassium bromate at pH 4. The rate of decrease in the absorbance of Alkali Blue (at 572 nm) was proportional to the concentration of V (IV) in the range of 100-6000 ng ml-1. The detection limit was 40 ng ml-1. The proposed method shows a good selectivity for V (IV) over a wide variety of interference species. It is also valuable in that the presence of a 400 fold excess of V (V) can be tolerable, contrary to many methods for the determination of V (IV) which suffer from severe interference of V (V). This method was successfully applied to the determination of V (IV) in river water, alloy samples and several synthetic samples. | ||
| کلیدواژهها | ||
| Catalytic؛ vanadium (IV)؛ Alkali Blue؛ spectrophotometric | ||
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