Table 2.
Mean values ± SEM (n = number of electrodes) for the two apparent permeabilities, P(HP)% and P(AA)% determined using Equations (6) and (7), respectively, and for the two selectivity parameters, S% and SG%, defined by Equations (8) and (9), respectively, for both PEC-coated and enzyme-free PoPD-modified PtC electrodes. The electropolymerization solution contained 300 mM oPD in PBS, and 5 mg mL−1 GOx for the co-immobilization design (PtC/PoPD-GOx).
| Design | n-value | P(HP)% | P(AA)% | S% | SG% |
|---|---|---|---|---|---|
| PtC/PoPD | 19 | 90 ± 5 | 0.11 ± 0.02 | 0.09 ± 0.01 | N/A* |
| PtC/GOx/PoPD | 6 | 97 ± 7 | 0.34 ± 0.05 | 0.20 ± 0.03 | 139 ± 36 |
| PtC/PoPD/GOx-GA | 4 | 98 ± 2 | 0.51 ± 0.07 | 0.29 ± 0.03 | 29 ± 8 |
| PtC/GOx/PoPD/GOx-GA | 4 | 127 ± 8 | 1.0 ± 0.1 | 0.55 ± 0.07 | 108 ± 32 |
| PtC/PPD-GOx | 8 | 120 ± 7 | 0.24 ± 0.04 | 0.14 ± 0.02 | 7 ± 1 |
*
Not applicable, because enzyme-free designs do not respond to glucose.