Figure 6: Ascorbate additions (concentrations: 40, 60, 80 and 100 mmol L-1) in the presence of (A) 100 mmol L-1 CPC and in the (B) absence of CPC. Urate additions (concentrations 40, 60, 80 and 100 mmol L-1) in the presence of 100 mmol L-1 CPC (C) and in the absence of CPC (D). Serum is diluted in PBS 1:4, pH 7.4. The arrows indicate the voltammogram behaviors with ascorbate and urate concentration increases.