Journal
4TH INTERNATIONAL CONFERENCE ON ENVIRONMENTAL SCIENCE AND DEVELOPMENT- ICESD 2013
Volume 5, Issue -, Pages 378-382Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcbee.2013.05.065
Keywords
chromium (VI); determination; extraction; APDC; naphthalene - biphenyl
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A method for the Spectrophotometric determination of chromium (VI) after extraction of its ternary complex with ammonium pyrrolidinedithiocarbamate (APDC) as the chelating agent in to molten naphthalene - biphenyl has been developed. The Cr-(PDC)(3) complex in a nitric acid solution is quantitatively extracted from into molten naphthalene - biphenyl at about 70 degrees C. Organic phase can be obtained as a solid lump on the surface of the aqueous phase, making its collection simple. Therefore the organic phase dissolved in methyl isobutyl ketone (MIBK). The chromium in this solution is than determined by using atomic absorption technique. The effect of different variables such as acid concentration, naphthalene biphenyl, shaking time, foreign ions and APDC concentration was investigated. (C) 2013 The Authors. Published by Elsevier B.V.
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