Kinetic-spectrophotometric determination of palladium in hydrogenation catalyst by its catalytic effect on the oxidation of pyrogallol red by hydrogen peroxide

Authors: Ali A Ensafi, M Keyvanfard

Publication date: 2002/6/30

Journal name:: Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy

Volume:58

Pages: 1567-1572

Publisher:Elsevier

A new kinetic-spectrophotometric method is described for the determination of ultra trace
amounts of Pd (II). The methods based on catalytic action of Pd (II) on the oxidation of
pyrogallol red (PGR) with hydrogen peroxide at pH 9.7. The reaction was monitored
spectrophotometrically by measuring the decrease in absorbance of the PGR at 540 nm, for
the first 4.5 min from initiation of the reaction. Calibration curve was linear in the range of
0.02–1.00 μg ml− 1 Pd (II). The limit of detection is 0.017 μg ml− 1 Pd (II). The relative ...