Abstract

AbstractAnew simple and rapid colorimetric method has been developed for the determination of benzidine in aqueous solutions. The method is based on the formation of a pink colored azo dye by diazotization of benzidine, followed by a diazo-coupling reaction between the resulting product and β-naphthol. The maximum absorbance of azo dye at 525 nm. Beer's law was found to be obeyed in the concentration range of 0-12 µg. ml1 with molar absorptivity 12360 L. mol1. cm1. The optimum reaction conditions and other analytical parameters were evaluated.

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The article was added to IASJ on 2012-06-04

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