A simple, sensitive and rapid indirect method for the determination of chromium(VI)is described. The method is based on the reduction of chromium(VI) to chromium(III) with elemental mercury in sulphuric acid medium. The oxidized mercury in return was determined by atomic absorption spectroscopy and used as a measure of chromium(VI) in the sample. Effects of a number of possible interferences on the determination have been checked and some synthetic and real samples of chromium(VI) have been analysed by the described method as well as by a reference spectrophotometeric method.
M A ASLAM ,M AHMAD ,J ANWAR ,
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