Spectrophotometric determination of copper(II) and palladium(II) using 3-hydroxybenzaldehyde thiosemicarbazone

Department of Chemistry, Sri Krishnadevaraya University, Anantapur-515 003,

Andhra Pradesh, India

Manuscript received 23 June 2004, revised 22 August 2005, accepted 29 August 2005

The analytical properties of 3-hydroxybenzaldehyde thiosemicarbazones (HBT) are described for the first time. The reagent gives yellowish green coloured complexes with copper(II), palladium(ll) in sodium acetate-acetic acid buffer medium of pH 5.5 and 2.5 respectively. The molar absorptivities or copper and palladium complexes respectively are 8.75 x 10³, and 1.25 x 10⁴ L mol^-1 cm^-1. These colour reactions have been investigated for the spectrophotometric determination of copper(ll) and palladium(ll) in aqueous medium.