| Samples | рН | Electromotive force /mv/ | ||
| Day 1 | Day 2 | Day 1 | Day 2 | |
| “Bayan” Mongolian egg | 8.37 | 8.41 | −62 | −69 |
| Russian egg | 8.42 | 8.57 | −67 | −79 |
| Iodized boiled egg | 8.66 | 8.75 | −86 | −91 |
| Lemon peel | 3.58 | 3.68 | +207 | +211 |
| Soil | 7.49 | 7.51 | −19 | −24 |