Preconcentration and determination of lead ions at a chitosan-modified glassy carbon electrode

Abstract

In this paper, the preparation of a chitosan-modified glassy carbon electrode (CMGCE), by the method of covalent-bond reaction, is described and the anodic stripping voltammetric characteristics of lead at a CMGCE are studied. The CMGCE can be used for the preconcentration and determination of trace amounts of lead(II) in water samples, and its sensitivity is about 14 times greater than that of an unmodified glassy carbon electrode. The selectivity, reproducibility and analytical results for water samples are satisfactory.