In this work, an alternative voltammetric procedure for the determination of Pb(II) was developed using a
carbon nanotube paste electrode modified with crosslinked chitosan with glutaraldehyde (GA-CTS-CNTPE).
Square-wave adsorptive stripping voltammetry (SWAdSV) was used and the relevant experimental parameters
were optimized. Under optimal experimental conditions, the voltammetric response was linear in the range
of 9.90 × 10−8 to 2.00 × 10−6 mol L−1with a detection limit of 5.70 × 10−8 mol L−1. The proposed voltammetric
method showed good repeatability and low interference from other metallic species. It was successfully applied
in the determination of Pb(II) in natural water samples and the results were in very close agreement with those
obtained using a comparative method (inductively coupled plasma optical emission spectrometry (ICP-OES))