Application of Single-Use PCB Gold Disc Electrodes for "In-Situ" Determination of As(III) in Natural Waters

A simple and cheap disposable (single-use) Au disc electrode was developed and fabricated by PCB production technology, extensively used in electronic industry. This type of electrode was successfully applied for “in-situ” As(III) determination in natural ground waters by the application of the Square Wave Anodic Stripping Voltammetry (SWASV) with a detection limit of 5.8 μg/L at 20 s deposition time and -480 mV deposition potential. A conductometry based method for surface reproducibility control and results correction was developed and successfully applied.