Table 3.
AA calibration limiting current, H2O2 slope and selectivities for PPD formed in oPD solutions containing different modifiers (each at 5 mg/mL). Values of p were calculated using unpaired two-tailed t-tests, comparing S% for each PPD-modifier composite with that for PPD-CEA (Table 2). Number of electrodes in parenthesis.
| Modifier |
iL(AA) nA |
H2O2 slope nA mM-1 |
S% (Eqn. 2) |
p-value |
|---|---|---|---|---|
| Gelatin | 1.1 ± 0.1 (6) | 117 ± 17 (6) | 0.90 ± 0.15 | p < 0.001 |
| Casein | 0.7 ± 0.1 (4) | 182 ± 54 (4) | 0.37 ± 0.12 | p > 0.30 |
| βCD | 0.9 ± 0.2 (10) | 533 ± 60 (8) | 0.17 ± 0.04 | p = 0.06 |