Determination of palladium in alloy by flame atomic absorption spectrometry after preconcentration of its iodide complex on amberlite XAD-16

Abstract

In this study, a method was developed for preconcentration and determination of palladium in alloys with flame atomic absorption spectrometry (FAAS). For preconcentration, a column containing Amberlite XAD- 16 has been used and the preconcentration conditions have been investigated as a function of pH, elution solution, complexing agent, volume of sample solution and flow rate of the sample solution. The effect of some matrix elements, such as Fe, Cu, Ni, Na, K, Ca and Mg, on the recovery of palladium has also been investigated. At optimum conditions determined experimentally, the recovery of palladium was found as to be 98.03±0.08%. For the determination of the adsorption behavior of the resin, the adsorption isotherm of palladium has been studied. The binding equilibrium constant (430 l mol-1) and the adsorption capacity (35.6 mg g-1) have also been calculated. The proposed method has been applied to the standard reference material (SRM) and palladium has been determined with the relative error 5.68%. The detection limit of the analyte has been found to be 0.051 mg l-1.