✦ LIBER ✦

Microdetermination of Vanadium(V) by Its Catalytic Effect on the Oxidation of 1-Naphthyl Red with Potassium Bromate

✍ Scribed by Huaisheng Wang; Aimei Zhang

Publisher: Elsevier Science
Year: 1997
Tongue: English
Weight: 67 KB
Volume: 57
Category: Article
ISSN: 0026-265X
DOI: 10.1006/mchj.1997.1429

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✦ Synopsis

A simple and sensitive kinetic-spectrophotometric method is described for the determination of trace vanadium(V). It is based on the catalytic effect of vanadium(V) on the oxidation of 1naphthyl red by potassium bromate in a hydrochloric acid medium in the presence of sodium oxalate as activator. The absorbance is measured at 525 nm with the fixed-time method. The proposed method allowed the determination of vanadium(V) in the range 1.0-40.0 ng ml 01 with good precision and accuracy. The method was applied to the determination of vanadium(V) in tap and natural waters and food samples with satisfactory results.

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