Differential Pulse Polarographic Determination of Cadmium After Solid Liquid Extraction and Preconcentration Using PAN

Authors : Mohammad Ali TAHER

Pages : 529-538

View : 18 | Download : 9

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A highly selective, sensitive, rapid and economical differential pulse polarographic method has been developed for the determination of trace amounts of cadmium in various samples after the adsorption of its 1-insert ignore into journalissuearticles values(2-pyridylazo);-2-naphthol insert ignore into journalissuearticles values(PAN); complex on microcrystalline naphthalene in the pH range of 8.2-11.0. After filtration, the solid mass is shaken with 9.0 mL of 1 M hydrochloric acid and cadmium is determined by differential pulse polarography. Cadmium can alternatively be quantitatively adsorbed on [1-insert ignore into journalissuearticles values(2-pyridylazo);-2-naphthol]-naphthalene adsorbent packed in a column and determined similarly. The detection limit is 0.07 m g/mL insert ignore into journalissuearticles values(signal-to noise ratio = 2); and the linearity is maintained in the concentration range 0.1-150 m g/mL with a correlation coefficient of 0.9995 and relative standard deviation of \pm 0.98%. Characterization of the electroactive process included an examination of the degree of reversibility. Various parameters such as the effect of pH, volume of aqueous phase and interference of a number of metal ions on the determination of cadmium have been studied in detail to optimize the conditions for determination in various samples.
Keywords : Trace cadmium determination, differential pulse polarography, 1 2 pyridylazo, 2 naphthol