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2007 | 5 | 4 | 1084-1093

Article title

Quantitative determination of hexavalent chromium in aqueous solutions by UV-Vis spectrophotometer


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In the last decade, different methods have been developed for the determination of chromium(VI) concentration in water. These methods use high cost equipment or they require a long preparation time. Because of their drawbacks, this paper describes an on-line, rapid and sensitive procedure for the determination of Cr(VI) concentrations in aqueous solutions via pH and absorption measurements. Only four Cr(VI) species are considered. The effects of pH and of total amount of chromium on the Cr(VI) speciation are investigated. The molar absorptivities of four chromium species at 371 nm are determined by minimising an objective function. The knowledge of these molar absorptivities and the measurements of pH and absorption at 371 nm lead to a rapid determination of total Cr(VI) concentration. The reliability and applicability of the method were confirmed using synthetic water samples. [...]










Physical description


1 - 12 - 2007
1 - 12 - 2007


  • Laboratoire de Génie des Procédés et Environnement, INSA de Rouen, Place Emile Blondel, BP 8, 76131, Mont Saint Aignan cedex, France
  • Laboratoire de Génie des Procédés et Environnement, INSA de Rouen, Place Emile Blondel, BP 8, 76131, Mont Saint Aignan cedex, France


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