Highly Sensitive Amperometric α-Ketoglutarate Biosensor Based on Reduced Graphene Oxide-Gold Nanocomposites

Figure 6

(a) Amperometric current-time curve showing the stability of the α-KG response at the GLUD/rGO-Au_nano/GCE. The first arrow indicates the addition of 1 mM NADH and the second arrow indicates the addition of 312.5 μM α-KG. (b) Amperometric current-time curve recorded for the GLUD/rGO-Au_nano/GCE with the addition of 0.25 mM NADH (A), 0.1 mM of DA (B), AA (C), UA (D), and 312.5 μM α-KG (E). The applied potential was 0.3 V. Stirring rate: 200 rpm.

(a)

(b)