A new and facile strategy for determination of lead and cadmium using silver electrodes manufactured from digital versatile discs

The use of a digital versatile disc(DVD)-based Ag electrode for the square-wave anodic stripping voltammetric determination of Pb 2+ and Cd 2+ was described. The effect of I – on the stripping analysis of Pb 2+ and Cd 2+ at Ag electrodes was first studied. I – significantly improved the stripping peaks of both Pb 2+ and Cd 2+ . The square-wave voltammetric stripping response was linear over 5―50 μg/L for Pb 2+ and Cd 2+ with a deposition time of 118 s. The detection limits were 0.2 and 2.6 μg/L for Pb 2+ and Cd 2+ , respectively. The high sensitivity, selectivity, and stability of this DVD-based Ag electrode enabled its practical application for simple, rapid and economical determination of trace levels of Cd 2+ and Pb 2+ in tap water samples. In addition, detection can be achieved without sample deoxygenation and the electrode can be easily manufactured.