Electrochemical Sensor for Determination of Pb²⁺ Based on Gold Nanoparticles

We report the formation of gold nanoparticles on indium tin oxide conducting glass (ITO) surface via electrodeposition method at room temperature. The prepared nano-Au electrodes has been fabricated for sensitive detection of Pb²⁺, and showed highly selective response toward Pb²⁺. The electrochemical detection of Pb²⁺ were determined by differential pulse stripping voltammetric (DPSV). The nano-Au electrochemical sensor could detect Pb²⁺ from 0.5 to 10 μM with detection limits of 0.06 μM (S/N= 3) and sensitivity of 0.27996 mA μM^-1. The proposed sensor is simple, reliable, sensitive, selective, and low-cost, thus holds potential for practical application in Pb²⁺ detection.