Spectrophotometric determination of trace amounts of palladium(ll) using iodide and rhodamine 6G

Abstract

A sensitive and highly selective procedure for the spectrophotometric determination of palladium(II) is described. The method is based on the formation of ternary ion-association complex, Pd-I^- -rhodamine 6G, in a citrate buffered medium. The colour system absorbs maximally at 575 nm with molar absorptivity of 8.2 x 10⁴ 1 mol^{- 1} cm ^{- 1} and obeys Beer's law in the range 1-10 <em>m</em><em>g. </em>The method has been applied successfully to the determination of palladium(II) in synthetic mixtures and in standard palladium activated charcoal.