Abstract
The present work provides a simple, fast, and inexpensive analytical method for determination of trace palladium (II) using adsorptive stripping voltammetry technique and modified glassy carbon electrode (GCE) as a working electrode. (E)-2-(Mercapto-phenylamino-methylene)-3 -oxo-N-p-tolyl-butanami de (MPMPB) was adsorbed on the GC surface to increase the method selectivity and sensitivity by the palladium coordination with this ligand. The proposed method provided extremely low detection limit of palladium (0.002 ng mL(-1)), whereas, the linearity was in the range of 0.02 - 0.13 ng mL(-1). The systematical study of the interferences of some electroactive species was carried out, and the results showed the high selectivity of the method. The concentration of palladium in some real samples was successfully determined, and the results of proposed procedure were compared with the measurements taken from a standard analytical method (ICP - MS).