Affiliation:
1. Laboratory of Analytical Chemistry, Department of Chemistry, University of Chittagong, Chittagong-4331, Bangladesh
Abstract
A very simple, non-extractive and new spectrophotometric method for the swift determination of trace amount of vanadium using salicylaldehyde-benzoylhydrazone (Sal-BH) has been developed. Sal-BH undergoes a reaction in a slightly acidic solution (0.0016-0.0032 M H2S04) with vanadium to give a light greenish-yellow chelate, which has an absorption maximum at 392 nm. The reaction is instantaneous and absorbance remains stable for over 24 hrs. The average molar absorption co-efficient and Sandell’s sensitivity were found to be 2.5039×105 L/mol.cm and 1.0 ng/cm2 V, respectively. Beer’s law was obeyed for 0.001-30 mg/L of V, providing a detection limit of 0.1 µg/L of V and RSD 0-2 %. The stoichiometric composition of the chelate is 1:1 (V:Sal-BH). Interference study shows that a large excess of over 60 cations, anions, and some common complexing agents (such as chloride, azide, tartrate, EDTA and SCN‑, etc.) satisfy the tolerance limit. The developed method was successfully used in the determination of vanadium in several standard reference materials as well as in some environmental waters, biological fluids, soil, food and pharmaceutical samples and solutions containing both vanadium (IV) and vanadium (V). The results of the proposed method for assessing biological, food and vegetable samples were comparable with ICP-OES and AAS were found to be in excellent agreement. The method has high precision and accuracy (s = ±0.01 for 0.5 mg/L).
Publisher
European Journal of Chemistry
Reference42 articles.
1. [1]. Baroch, E. F.; Updated by Staff., Vanadium and Vanadium Alloys. Kirk-Othmer Encyclopedia of Chemical Technology, 2013.
2. [2]. Crans, D. C.; Gottlieb, M. S.; Tawara, J.; Bunch, R. L.; Theisen, L. A. Anal. Biochem. 1990, 188(1), 53-64.
3. [3]. Clayton, G. D.; Clayton, F. E. (Eds)., Patty's Industrial Hygiene and Toxicology, 3rd Edition, Vol. 2A, Wiley, New York, 1981, pp. 2013-2036.
4. [4]. Bratter, P.; Schramel, P., Trace Element Analytical Chemistry in Medicine and Biology, De Gruyter, Berlin, 1984, pp. 375-383.
5. [5]. Mracova, M.; Jirova, D.; Janci, H.; Lener, J. Sci. Total Environ. 1993, 16, 633-633.
Cited by
3 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献