Abstract
ABSTRACT|A highly selective, sensitive, rapid and simple atomic absorption spectrometric method has been developed for the determination of trace amounts of palladium in synthetic and real samples. Palladium can be adsorbed on naphthalene-1, 5-diphenyl-carbazone (DPCO) as adsorbent from the large volume of its aqueous solutions in the pH range 2.0 to 0. After filtration, the metal ion was desorbed with 5ml of 0.25M thiourea solution, and determined by AAS. Alternatively, palladium can be adsorbed on this adsorbent packed in a column and determined similarly. The detection limit is 0.5 μg (signal to noise ratio=2) and the linearity is maintained in concentration range of 1.5-50μg of Pd with a correlation coefficient of 0.9992. Seven replicate determinations on samples containing 2.5 and 20μg of palladium gave the relative standard deviations of 3.6% and 0.81%, respectively. Various parameters such as effect of pH, volume of aqueous phase, shaking time and interference of number of ions on the determination of Pd have been studied in detail to optimize the conditions for its estimation in various synthetic and real samples.
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