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. 2021 Jun 30;14:11786469211023468. doi: 10.1177/11786469211023468

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© The Author(s) 2021

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 License (https://creativecommons.org/licenses/by-nc/4.0/) which permits non-commercial use, reproduction and distribution of the work without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 5. — Cyclic voltammetric (CV) results of 2 µM Kyn in 0.1 M H₂SO₄. CVs of Kyn at the bare GCE (a) and the Nafion/GCE (b) are shown in panel (A). Curve c: the Nafion/GCE in blank solution; scan rate: 100 mV/s. Panel (B): CVs of Kyn at the Nafion/GCE obtained for different scan rates (50-500 mV/s). Relationships between Kyn anodic peak currents (Ip) and the scan rates (v) (panel (C)) or square root of the scan rates (v^1/2) (panel (D)) at the Nafion/GCE are presented. Regression of the logarithm of the Kyn peak currents (log Ip) and the logarithm of the scan rates (log v) is shown in panel (E).