A Glassy Carbon Electrode Modified with N-(2-Hydroxybenzyl)chitosan for Voltammetric Determinations of Cu2+ and Pb2+

Abstract
A glassy carbon electrode was chemically modified with N-(2-hydroxybenzyl)chitosan which could act as an agent to preconcentrate Cu2+ and Pb2+. The modified electrode was stable for 30 d and its calibration curves for the voltammetric determination of these ions are linear in the concentration range of (1–10)×10−7 mol dm−3. The usage limitation of this electrode has also been discussed.