Fig. 5

Chronoamperograms obtained at DBT–CNT/GCE in 0.1 M phosphate buffer solution (pH = 7.0) for various concentration of IP at a potential step of 240 mV. The numbers 1–6 correspond to 100.0, 400.0, 600.0, 800.0, 1000.0, and 1400.0 μM of IP. Inset (A): plots of I vs. t ^−1/2/s^−1/2 obtained from chronoamprograms 1–6. Inset (B): plot of the slope of the straight lines vs the IP concentration