Some novel reactions for the determination of traces of selenium in environmental samples

Hemanth Kumar, M. S. and Nagaraja, P. and Yathirajan, H. S. and Prakash, J. S. (2002) Some novel reactions for the determination of traces of selenium in environmental samples. Fresenius Environmental Bulletin, 11 (7). pp. 396-401. ISSN 1018-4619

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Abstract

Rapid and sensitive spectrophotometric methods for the determination of traces of selenium (IV) are described. The methods are based on either the oxidation of 3-methyl-2-benzothiazolinone hydrazone hydrochloride (MBTH) by selenium in hydrochloric acid medium and coupling with N-(1-naphthyl)ethylenediamine dihydrochloride (NEDA) to give a blue coloured product or the oxidation of dopamine hydrochloride (DPH) by selenium in sulphuric acid medium and coupling with 3-methyl-2- benzothiazolinone hydrazone hydrochloride to yield a pink coloured product. The blue coloured product with a lmax of 590 nm is stable for 8 h and the pink coloured product with a lmax of 520 nm for 48 h. Beer’s law is obeyed for selenium in the concentration ranges of 0.04- 4.0 mg mL-1 (blue product) and 0.08-2.4 mg mL-1 (pink product), respectively. The optimum reaction conditions and other important analytical parameters are reported. Interference due to various cations and anions have been investigated. The proposed methods are applied to the analysis of polluted water, natural water, plant material, soil sample and synthetic mixture. The results of analysis are compared with the reported method.

Item Type: Article
Subjects: C Chemical Science > Chemistry
Divisions: Department of > Chemistry
Depositing User: MUL SWAPNA user
Date Deposited: 30 Oct 2019 05:45
Last Modified: 30 Oct 2019 05:45
URI: http://eprints.uni-mysore.ac.in/id/eprint/9706

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