SPECTROPHOTOMETRIC DETERMINATION OF COPPER AND PALLADIUM USING A NEW REAGENT

Abstract

Highly sensitive spectrophotometric methods for determination of copper and palladium by a new synthesized chromogenic reagent N-dodecyl-N′-(sodium p-amino-benzenesulfonate)-thiourea (DOPT) were developed. In the presence of CTMAB and NaAc-HAc buffer solution, under the optimum conditions for color reaction of copper and palladium with DOPT, their molar absorptivities are ε_300.4 nm = 1.56 × 10⁵ l mol⁻¹ cm⁻¹ at 300.4 nm for copper and ε_296.0 nm = 7.41 × 10⁴ l mol⁻¹ cm⁻¹ at 296.0 nm for palladium. Microamounts of copper and palladium in samples were satisfactorily determined by the methods.