Abstract
A simple, rapid, highly selective and sensitive method for the spectrophotometric determination of palladium(n) in trace amounts is worked out employing 5-chloro-8-hydroxy-7-iodoquinoline as a complexing agent for the metal ion and extracting the coloured complex into chloroform from 1 M H 2 SO 4 solution, whose absorbance is measured at 450 nm. Beer's law is obeyed in the range 0-2.6 μg Pd mL -1 . Molar absorptivity and Sandell's sensitivity of the complex are 0.9 x 10 4 dm 3 mol1 cm -1 and 0.0119 μg rd cm -2 , respectively. The method is free from the interference of a large number of elements including molybdenum, tungsten, tantalum, silver and other platinum metals. The proposed method handles satisfactorily the analysis of several samples of varying complexity.
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