TY - JOUR TI - Portable potentiostat DO - https://doi.org/doi:10.7282/t3-ggat-p233 PY - 2019 AB - As the world is moving forward trying to improve the purity of water, some parts are still faced with severe water purity crisis. Many drinking water supplies are contaminated by lead traces higher than the permissible limit which is 15 ug/L as decided by the US EPA. This lead contamination mostly occurs due to corrosion or solder joints in pipes, further leading to deaths or carcinogenic implications among victims. Thus to find a cost effective and precise solution, we here present a novel method to detect lead in water sources, with high accuracy using low powered portable device. The circuit consists of a 3-electrode potentiostat later connected to a Trans-Impedance Amplifier, LPF and then the signal is read through a 12-bit ADC. A digital data measurement and analysis logic was designed in LabVIEW, which read the voltammograms plots. We tested our circuit on three different concentration of lead in nitric acid/acetate buffer. The solution is scanned with a linear wave stripping voltage and the current is measured to analyze peaks at the redox potential of lead. The amplitude of this peak determines the concertation of lead in the solution. Thus we were able to detect distinct peaks for these three concentrations. This palm sized device, designed using low end off the shell components, will be later used to serve as an input to a lead filtration system which can be installed on site. KW - Potentiostat KW - Electrical and Computer Engineering LA - English ER -