Table 2.
Comparison between the pH readings obtained using the pH meter and the portable device.
| pH meter value | portable device measured pH value |
|---|---|
| 4 | 4.1 |
| 5 | 5.04 |
| 6 | 6.08 |
| 7 | 7.07 |
| 8 | 8.05 |
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