α3Y forward (oxidation) and reverse (reduction) square-wave voltammograms obtained at 5.52 ± 0.01 and using a SW frequency of (A) 190 Hz (tp 2.6 ms) and (B) 540 Hz (tp 926 μs). SWV settings: 80 μM α3Y in 20 mM APB, 80 mM KCl, pH 5.52 ± 0.01; PGE working electrode, temperature 25 °C, step potential 0.15 mV, SW pulse amplitude 25 mV.