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. 2021 Apr 7;11:7663. doi: 10.1038/s41598-021-86866-z

Figure 2.

Figure 2

CV curves of Au and Pt electrodes recorded using sweat and saliva bio-mimic solutions at a fixed scan rate of 50 mV/s. (A) Au and (B) Pt electrodes in artificially simulated sweat solution + Fe2+/3+ redox couple. Similarly (C) Au and (D) Pt electrodes in artificial saliva solution + Fe2+/3+ redox couple. These CVs are recorded for 1 mM [Fe(CN)6]3−/4− redox couple containing 0.1 M NaCl in absence (a) and in presence (b) of either sweat or saliva compositions respectively.