(a) The multi-cycle stability testing of P1 as reference electrode (RE) in dichloromethane solution with 0.1 M TBAP electrolyte, with ferrocenemethanol (FcMeOH) used as redox probe. (b) Comparison of P1 with Pt and Ag/AgCl reference electrodes, with FcMeOH used as redox probe. (c) The compatibility of P1 as RE in different non-aqueous solutions, with FcMeOH used as redox probe. (d) The stability of GC/P1, Pt and Ag/AgCl as REs in dichloromethane solution with 0.1 M TBAP electrolyte, with FcMeOH used as redox probe and its average potentials plotted. (e) Scheme displaying the potential of GC/P1 vs. the other common RE systems.