This work describes the determination "in natura" of copper ions in alcoholic distilled beverages by anodic stripping voltammetry without previous treatment or addition of supporting electrolyte, using a glassy carbon electrode. The choice of an appropriate stripping voltammetric method minimizes the organic content influence and assures the good reproductivity of the measurements. The reliability of the method was tested comparing the results with the anodic stripping voltammetry, with a hanging mercury drop electrode, and atomic absorption spectrometry giving differences of about 7%. The method allows to determine copper ion in the μg L−1concentration range.