Voltammetric detection of nanomolar levels of hypoxanthine in the presence of copper (II) at glassy carbon electrode

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Abstract
Nanomolar levels of the hypoxanthine in NaOH electrolyte cantaining copper (II) can be determined by anodic stripping voltammetry at a glassy carbon electrode. In the present article hypoxanthine-Cu+ is shown to be adsorbed on the electrode surface in the presence of an excess of copper(II). After accumulation period, hypoxanthine-Cu+ was stripped from the electrode surface and the anodic current coming near to the oxidation of Cu(I) to Cu(II) was measured. A linear calibration curve in the range of 5 nmol/L-1.5 mmol/L hypoxanthine, with a detection limit of 0.5 nmol/L hypoxanthine were obtained.