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Title: Spectrophotometric method for the determination of chromium (VI) in water samples. Author: Nagaraj P, Aradhana N, Shivakumar A, Shrestha AK, Gowda AK. Journal: Environ Monit Assess; 2009 Oct; 157(1-4):575-82. PubMed ID: 18850286. Abstract: A simple and sensitive spectrophotometric method for the determination of chromium has been developed. The method is based on the diazotization of Dapsone in hydroxylamine hydrochloride medium and coupling with N-(1-Napthyl) Ethylene Diamine Dihydrochloride by electrophilic substitution to produce an intense pink azo-dye, which has absorption maximum at 540 nm. The Beer's law is obeyed from 0.02-1.0 microg mL(-1) and the molar absorptivity is 3.4854 L mol(-1) cm(-1). The Limits of quantification and Limit of detection of the proposed method are 0.0012 microg mL(-1) and 0.0039 microg mL(-1) respectively. The method has been successfully applied for the determination of chromium in water samples and the results were statistically evaluated with that of the reference method.[Abstract] [Full Text] [Related] [New Search]