Abstract
This work presents a method for the preconcentration of lead using dispersive liquid-liquid microextraction. 2,2' Dithiobis (benzothiazole) was used as the chelating agent, and chloroform was selected as the extraction solvent. Parameters such as: pH, volume of ligand, volume of extraction solvent and dispersive solvent volume affecting on the extraction efficiency of method has been evaluated by Plackett-Burman design. The limit of detection and limit of quantification were 4.3 mu g L-1 and 14.2 mu g L-1, respectively. The accuracy of the method was evaluated by analyzing certified reference materials. Method was applied to the determination of lead in water samples. (C) 2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.