Table 1.
Comparisons of electroanalytical methods based on CV and potential step methods.
| Potential windows (V) | Epeak (V) | Calibration curves based on CV curves i (nA)∝CCH3CHO (ppm) | Amperometric sensor methods | Eapplied (V) | Calibration curves based on potential steps i (nA)∝CCH3CHO (ppm) |
|---|---|---|---|---|---|
| 0 ~ + 1.2 | +0.9 (Ox1‴) | i = 6.54*C + 2.26E4 | Single-potential step | +0.9 | i = 1.42*C + 7.06E2 |
| −0.7 ~ + 1.2 | +0.9 (Ox1″) | i = 34.6*C + 4.88E4 | Double-potential step | +0.9 | i = 2.68*C + 1.35E4 |
| −0.5 (Red1″) | i = −42.1*C − 2.15E4 | −0.5 | i = −3.21*C − 4.86E3 | ||
| −1.5 ~ + 1.2 | −1.2 (Red2) | i = −16.8*C − 3.49E5 | Triple-potential step | −1.2 | i = −1.95*C − 1.45E5 |
| +0.5 (Ox1) | i = 20.6*C + 1.23E5 | +0.5 | i = 1.86*C + 1.81E4 | ||
| −0.5 (Red1) | i = −37.8*C − 9.73E3 | −0.5 | i = −4.18*C − 1.26E4 |