VOLTAMMETRY OF ADENOSINE AFTER ELECTROCHEMICAL TREATMENT OF CARBON-FIBER ELECTRODES

Voltammetry of adenosine after electrochemical treatment is explored. The activation scheme includes an anodic potential (+2.2 V) for 125 ms and a cathodic potential (-1.0 V) for 75 ms. Subsequent staircase vol tammetry can be used to obtain both qualitative and quantitative infor mation. This activation procedure has been applied to 11 mu m carbon-f iber microelectrodes to obtain reproducible voltammograms for adenosin e. To characterize this activation procedure, the effect of the magnit ude and duration of both the anodic and the cathodic potentials have b een studied. Data obtained suggest that the magnitude of the applied p otential pulse is critical to proper electrode activation, whereas dur ation and total charge passed have minimal effects.