Anodic Stripping Voltammetric Determinat

This study investigates the determination of lead (Pb II) using a glassy carbon electrode modified through a drop-coating technique with diaza-18-crown-6 (DA18C6) and Nafion (NF). The primary objective was to enhance the sensitivity and selectivity of lead detection through square wave anodic stripping voltammetry (SWASV). Optimized conditions included a concentration of 3 mmol L -1 DA18C6, 3 wt % NF, and a supporting electrolyte of 10 mmol L -1 HCl, with controlled frequency, accumulation time, and potential applied. The modified electrode demonstrated an impressive detection limit of 0.09 µg L -1 and a linear response range of 10-50 µg L -1. Additionally, the study evaluated the interference from common metal ions, such as Fe (II), Pb (II), Cd (II), and Cu (II). Results indicated that the method is not only sensitive and selective but also straightforward, with a relative standard deviation of 11%, indicating the potential for practical application in monitoring lead levels in various aqueous environments. This research contributes significantly to the field of electroanalytical chemistry by presenting a viable alternative for the assessment of toxic heavy metals.