Fig. 3: Characterization of in vitro sodium and potassium ion sensors.
From: Large-scale fully printed “Lego Bricks” type wearable sweat sensor for physical activity monitoring

a OCPT response and hysteresis test of Na+ sensor in NaCl solution, b forward and reverse calibration plots, c reproducibility test, and d selectivity test. e OCPT response and hysteresis test of K+ sensor in KCl solution, f forward and reverse calibration plots, g reproducibility test, and h selectivity test.