| |
Amount of citric acid |
| 0 |
0.2% |
0.4% |
0.6% |
0.7% |
0.8% |
| pH Colour |
6.42 ± 0.05a |
5.76 ± 0.22b |
5.16 ± 0.11c |
4.79 ± 0.05d |
4.73 ± 0.05d |
4.49 ± 0.02d |
| |
|
|
|
|
|
|
| Red |
1.41+0.11a |
1.87+0.22b |
2.05+0.05b |
2.03+0.08b |
2.00+0.00b |
2.05+0.05c |
| Yellow |
1.43+0.09a |
1.85+0.15b |
2.07+0.16c |
2.12+0.08c |
2.07+0.05c |
2.08+0.07c |
| Blue |
0.24+0.09a |
0.32+0.08a,b |
0.25+0.10a |
0.30+0.09a,b |
0.30+0.12a |
0.15+0.08a,b |
| Colour of Sample |
orange+1.4 |
orange+1.9 |
orange+1.9 |
yellow/orange+0.1 |
yellow/orange+0.1 |
orange+2.1 |
Values are mean ± Standard Deviation
Means in the same row followed by the same letter are not significantly different from each other at P<0.05. |
