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. Author manuscript; available in PMC: 2010 Dec 1.
Published in final edited form as: Biosens Bioelectron. 2010 Jul 23;26(2):682–688. doi: 10.1016/j.bios.2010.06.064

Fig. 3.

Fig. 3

(a) H2O2 sensitivity vs. potential of CV-activated Pt-black electrodes, along with corresponding background current (in the absence of H2O2) and signal-to-noise (background) (S/N) ratio. (b) H2O2 sensitivity versus flow rate (at 0.5 V vs. Ag/AgCl). (c) Linear dynamic range (y = 46.7 + 23.1x, R2 = 0.995) for H2O2 detection at 0.3 V vs. Ag/AgCl, 50 μL/min PBS flow. Inset show staircase amperometric curve for four additions of 10 nM H2O2 at limit of detection (LOD), indicated by the respective four steps. (d) Long-term reproducibility study of sensitivity of these sensors against H2O2 detection, following daily CV-reactivation.