Table 5.
pH | 0 min | 30 min | 60 min | 90 min | 120 min | 150 min | 180 min |
---|---|---|---|---|---|---|---|
3.0 | 8.46±0.015 | 8.40±0.010 | 8.53±0.020 | 8.61±0.037 | 8.71±0.030 | 8.79±0.026 | 8.93±0.023 |
4.0 | 8.48±0.020 | 8.42±0.026 | 8.61±0.010 | 8.66±0.264 | 8.76±0.017 | 8.93±0.025 | 8.97±0.056 |
Values are means of triplicate determinations with standard deviations.