Sensitive spectrophotometric determination of palladium(II) with nicotinaldehyde-4-phenyl-3-thiosemicarbazone

Abstract

A sensitive extraction–spectrophotometric method for the determination of palladium with nicotinaldehyde-4-phenyl-3-thiosemicarbazone (NPS) is described. The method is based on the formation of an insoluble palladium(II)–NPS complex, which is extractable into chloroform from an aqueous solution at pH 3.0 by shaking for 5 min. The absorbance is measured at 365 nm and the molar absorptivity is 2.81 × 10⁴ l mol^–1 cm^–1. The complex system obeys Beer's law within 0.5–8.0 µg ml^–1 of Pd^II. The main advantage of the proposed method is that it is simple and sensitive. It was found that this method was applicable to the determination of palladium in real samples.