ISSN:
1040-0397
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A rapid, sensitive, selective single-sweep polarographic method for the determination of palladium based on the reduction of palladium(II) in the Pd(II)-dimethylglyoxime (DMG) complex is described. In weakly acidic media, Pd(II) reacts with DMG and forms a yellow precipitate. After adding a low concentration of the anionic surfactant SDBS (sodium dodecylbenzenesulfonate), the solubility of the complex increases remarkably, and the sensitivity of the determination increases more than fivefold. The solution is stable for at least 3 hours. The complex is strongly adsorbed on the surface of the mercury electrode. The enhancement effect of the surfactant is ascribed to the “synergistic adsorption” of the complex and the surfactant. The current is caused by the reduction of palladium in the complex at -0.45 V (versus SCE). The method can be used to determine trace amounts of palladium over the range of 4 × 10-8 to 4 × 10-6. Assays of palladium catalysts and waste water samples are illustrated.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/elan.1140010416
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