Sinha, Prasanta Kumar and Majumdar, Anish Kumar and Kundu, Dipali (2013) A rapid spectrophotometric method for measuring arsenic in water after enrichment of arsenomolybdate on polyurethane foam and complexation with Rhodamine B. Journal of the Indian Chemical Society, 90 (6). pp. 777-782. ISSN 0019-4522

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Simple, rapid and accurate spectrophotometric method is presented for the determination of arsenic in water. The method is based on the preconcentration of arsenomolybdate on polyurethane foam followed by its elution in acetone and formation of ion association complex of arsenomolybdate with Rhodamine B. The absorbance of the complex is measured at 560 inn. The colour system obeys Beer's law from 0.5-5.0 ng mL(-1) of arsenic. The detection limit has been found to be 0.10 ng mL(-1) of As. The molar absorptivity was found to be 2.25 x 10(6) L mol(-1) cm(-1). Under optimized conditions, the proposed method was applied to the determination of arsenic present in surface and ground water samples collected from lakes and tube wells. The method has been applied successfully to determine arsenic in NIST standard water sample and the result is in good agreement with the certified value.

Item Type: Article
Subjects: Environment and Pollution
Depositing User: Bidhan Chaudhuri
Date Deposited: 21 May 2015 07:00
Last Modified: 21 May 2015 07:00

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