This study demonstrates a fast and efficient method for electrode modification and its application in the detection of arsenic in aqueous media via anodic stripping voltammetry. The entire process from electrode modification to arsenic detection can be achieved in a matter of minutes. Ahigh sensitivity (nearly 2000AM−1 with SWV) and a limit of detection (0.1gL−1) much lower then the recommended level setbytheWorldHealthOrganisationof10gL−1 wasroutinely achieved. The gold modified carbon nanotubes show long life time and generate precise measurements over a 10 month period. These features provide possibilities for the material to be incorporated into existing technologies, where problems of interference and electrode fouling have already been reduced or overcome for the in-field detection of arsenic in natural water samples