Citrus Limon Peel As a Component of Modified Carbon Paste Electrode for Electrochemical Stripping Analysis of Pb (II)

The present work deals with the modification of Carbon paste electrode (CPE) with Citrus limon peel to enhance its activity toward metal determination in aqueous samples. Differential pulse anodic stripping voltammetry was utilized to characterize the electrochemical parameters and the performance of this new metal sensor under different preparation and operation conditions. Metal ions were pre-concentrated on the modified electrode surface at open circuit and determination of these metal ions was carried out by stripping voltammetry in anodic direction. Different operational conditions were optimized for determination of lead. The effect of surface active macro molecules was also studied. Enhancement in metal detection and determination has been observed with the modified electrode for Pb (II) as compared to the bare CPE. The LOD values are 59.5 ppb for Pb (II).