Abstract
A kinetic method for the determination of mercury has been developed by using the iodide-catalyzed reaction between arsenite (III) and cerium (IV). The difference in reaction rate due to inhibition by mercury was measured spectrophotometrically at 275 nm. Optimum reaction conditions were investigated in order to obtain a greater sensitivity in the determination of mercury. The described procedure can be used satisfactorily for samples containing mercury in the 1 to 60 ng range, with an overall error of less than 5 %.
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