Separation/Preconcentration of Cadmium and Nickel by Dispersive Liquid-Liquid Microextraction: Application to Water and Plants

摘要

ABSTRACT Dispersive liquid-liquid microextraction has been used for separation/preconcentration of nickel and cadmium as previous step to the determination of both ions by FAAS. The influences of analytical parameters, including pH, extraction solvent volume, disperser solvent type and its volume, concentration of chelating agent, on the quantitative recoveries of nickel and cadmium were investigated. Under the optimized conditions, a preconcentration factor of 60 and 82.5 were obtained for Ni .