T Shamspur - Chemistry Department, Shahid Bahonar University of Kerman, Kerman, Iran
A Mostafavi - Chemistry Department, Shahid Bahonar University of Kerman, Kerman, Iran
I Sheikhshoaie - Chemistry Department, Shahid Bahonar University of Kerman, Kerman, Iran
D Afzali - Environment Department, International Center for Science, High Technology and Environmental Sciencess,Kerman,Iran

In this study, a solid phase extraction procedure is proposed for separation and preconcentration trace amounts of Pd(II) in aqueous medium by using a column of multiwalled carbon nanotubes (MWCNTs) modified with N,N`-bis (2-hydroxybenzylidene)-2,2`(aminophenylthio) ethane reagent. An implementation, it was found that the sorption is quantitative in the pH range (1.5-4), whereas quantitative desorption occurs instantaneously with 6.0 mL of 0.1 mol L-1 Na2SO3. Various parameters such as the effect of pH, flow rate, type and amount of eluent, breakthrough volume and interference of a large number of ions on the recovery of the palladium ions was studied. The method was successfully applied for separation and determination of palladium ions in water samples.

Multiwalled carbon nanotubes; Preconcentration; palladium determination