Determination of palladium(II) in presence of micellar medium by derivative spectrophotometric technique

M. Rameswara Rao , K. B. Chand

Abstract

A simple and sensitive spectrophotometric method has been developed for the determination of palladium(II) using newly synthesized 3-methoxysalcilaldehyde-4-hydroxybenzoylhydrazone (MSHBH) reagent in a micellar medium of CTAB (acidic surfactant). Palladium(II) forms an orange yellow colored water soluble complex with the MSHBH reagent in acidic buffer medium pH 4.5. Beer’s law obeyed in the range 0.2876 to 4.2568 μg/mL of Pd(II) λmax at 412 nm. The molar absorptivity and Sandell’s sensitivity of colored species are 1.03 x104 L.mol-1.cm-1 and 0.0103 μg.cm-2 respectively. Palladium(II) forms (M: L) 1:1 complex and stability constant of the complex is 9.32x104. The developed first and second order derivative spectrophotometric methods were employed for the determination of palladium(II) in alloy samples and hydrogenation catalyst samples.