Spectrophotometric Determination of Palladium(II) Using Thioglycollic Acid

Abstract

A simple and sensitive spectrophotometric method is proposed for the determination of palladium(II) in ppm level using thioglycollic acid, as the spectrophotometric reagent. In aqueous medium at a pH of 11, Pd(II) forms a light yellow coloured complex with the proposed spectrophotometric reagent. The optimum concentration range for maximum precision was deduced from Ringbom's plot and was found to be 2.4-6.4 ppm of Pd(II). The mean value of molar absorptivity and Sandell's sensitivity were calculated and was found to 2.0692 × 10⁴ L mol^-1 cm^-1 and 6.8287 × 10^-3 g/cm², respectively. The composition of Pd(II)-AMMT complex was found to be of ML₂. The interference of various cations and anions were studied also studied.