Abstract
In order to determine trace amounts of palladium reproducibly, a spectrophotometric method using thio-Michler's ketone (TMK) was developed. In this method, it was found that addition of hydroxylamine hydrochloride effectively suppressed oxidation and decomposition of TMK and Pd (II)-TMK complex. A good linear relationship was obtained in the concentration range of 0.1-0.5 ppm for Pd(II). The molar absorptivity was 1.9×105dm3 mol-1 cm-1 and the coefficient of variation was 1%. The method proposed here could be applied successfully to the determination of trace amounts of palladium in antibiotics and in catalysts for automobile exhaust purifiers.
