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. Author manuscript; available in PMC: 2020 Sep 27.
Published in final edited form as: ACS Sens. 2019 Aug 21;4(9):2403–2411. doi: 10.1021/acssensors.9b00994

Fig. 4.

Fig. 4

Analytical performance of ND-COOH 15/CFME for dopamine detection. (A) log-log relationship between anodic peak current of 1 μM dopamine and scan rate (n = 3). (B) Concentration dependence from the anodic peak current of 20 nM to 100 μM dopamine in PBS pH 7.4 (n = 4), compared to unmodified CFME. (C) Linear range at both electrodes. (D) Example CV of 20 nM dopamine in PBS pH 7.4 with current-time trace inset for 5-s bolus injection.