Table 4.
Pasting profile of native and acid modified sweet potato starches
| Parameters | Native | A | B | C | D |
|---|---|---|---|---|---|
| Peak viscosity(cP) | 3421.50 ± 434.87a | 2770.00 ± 499.21b | 34.50 ± 0.70c | 4407.00 ± 114.55d | 5396.50 ± 61.51e |
| Trough viscosity(cP) | 2223.50 ± 175.76a | 1583.50 ± 331.63b | 15.50 ± 0.70c | 1917.50 ± 231.22b | 3127.00 ± 91.92a |
| Break down(cP) | 1198.00 ± 39.59a | 1186.50 ± 167.58a | 19.00 ± 0.00b | 2489.50 ± 116.67c | 2269.50 ± 30.40d |
| Final viscosity(cP) | 3447.00 ± 149.19a | 2644.00 ± 319.61b | 29.00 ± 0.35c | 3991.50 ± 579.12d | 4201.50 ± 193.04e |
| Set back(cP) | 1065 ± 103.23a | 1060.50 ± 12.02ab | 13.50 ± 0.70c | 2074.00 ± 810.34d | 1074.50 ± 101.11ab |
| Peak time(min) | 4.47 ± 0.00a | 4.67 ± 0.00b | 4.16 ± 0.04c | 4.70 ± 0.14bd | 4.76 ± 0.04bd |
| Peak temperature(°C) | 81.10 ± 0.70a | 80.70 ± 0.07a | ND | 79.87 ± 0.03b | 78.27 ± 0.03c |
A and B stand for 1 % and 5 % Hydrochloric acid treated starches whereas C and D stand for 1 % and 5 % of citric acid treated starches respectively. Mean values followed by the same letters within the row are not significantly different (P > 0.05). ND not detected