Gold micro-wire electrode on thick film basis for the determination of arsenic in waters. The scTRACE Gold is a combined voltammetric sensor for voltammetry. Gold micro-wire working electrode, Ag/AgCl reference electrode and carbon auxiliary electrode are located on a sensor. Simple in its handling and practically maintenance-free, the scTRACE Gold can for example be used to determine arsenic in water in the trace range. Together with the 6.1241.080 electrode shaft, it can be used with any Metrohm voltammetry measuring stand.