2004 Volume 72 Issue 5 Pages 298-301
Electro-oxidation reaction of NO in phosphate buffer solution (0.1 M (1 M= 1 mol dm-3), pH 7.2) containing its oxidized species, electroactive NO2-, has been investigated using cyclic and linear sweep voltammetry with electrochemically pretreated Au, Pt, and glassy carbon electrodes. Well-separated oxidation peaks for NO and NO2- could be observed at these pretreated electrodes. Thus the values of saturated concentration (CNO) and diffusion coefficient (DNO) of NO were simultaneously determined to be 1.7±0.1 mM and (1.3±0.1)×10-5 cm2 S-l, respectively, using hydrodynamic chronocoulometry. The values obtained are briefly discussed on the basis of comparison with those previously reported.
