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- W2113241857 abstract "A rapid and sensitise spectro photo metric method for the determination of race amounts of chromium(VI) is described, The method is based on the oxidation of trifluoperazine hydrochloride (TFPH) by chromium(VI) in the presence of orthophosphoric acid. The red Coloured species obtained give an absorption maximum at 505 nm. The system obeys Beer's law over a range of 2 to 18 mug of Cr(VI) in the final volume of 10 mL. The molar absorptivity of the colour system is 2.09 x 10(4) L mol(-1) cm(-1) and the developed colour is stable for 2 h. The detection limit of Cr(VI) is 0.0033 mug mL(-1). Chromium(III) can be determined after oxidation to chromium(VI) with bromine water in alkaline medium. The method has been used for the determination of chromium in alloy steels, industrial effluents and pharmaceutical samples." @default.
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- W2113241857 date "2002-01-01" @default.
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- W2113241857 title "Rapid spectrophotometric determination of chromium with trifluoperazine hydrochloride" @default.
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