Group No. |
Normal Maintenance |
pH=4 kept for 60d |
pH=4 kept for 90d |
pH=2 kept for 60d |
pH=2 kept for 60d |
1 |
4.004 |
3.326 |
2.921 |
2.972 |
2.972 |
2 |
3.810 |
3.014 |
3.231 |
2.948 |
2.814 |
3 |
3.975 |
3.416 |
3.055 |
3.019 |
3.015 |
4 |
4.001 |
3.259 |
3.202 |
2.896 |
2.581 |
5 |
4.065 |
3.292 |
3.137 |
3.059 |
3.02 |
6 |
3.930 |
3.481 |
3.051 |
2.488 |
2.873 |
7 |
3.835 |
3.247 |
3.261 |
2.921 |
2.907 |
8 |
3.457 |
3.443 |
2.777 |
3.090 |
2.879 |
9 |
3.884 |
3.372 |
3.285 |
3.012 |
2.802 |
10 |
3.995 |
3.426 |
3.066 |
3.014 |
2.96 |
11 |
3.850 |
3.450 |
3.178 |
3.614 |
2.843 |
12 |
3.825 |
3.345 |
3.292 |
2.989 |
3.019 |