Effect of copper ions on voltammetric signals of aminopurines at a carbon electrode

Electrochemical oxidations of aminopurines (adenine–Ade, 2–aminopurine, 2AP, 2,6–diaminopurine, 2,6–DAP) and theircomplexes with Cu(I) on carbon electrodes (pencil–PeGE) wereinvestigated by means of linear sweep voltammetry (LSV) andelimination voltammetry with linear scan (EVLS). We found thatthe Cu(I)–purine complex was formed not only by aminopurines butalso by purine. On the other hand the complex is not formed in thecase of imidazol or cytosine. The results showed that carbonelectrodes in connection with EVLS can be an excellent prototypefor cheap and fast working sensor for aminopurines in the presenceof copper.