Table 5.
Acyl content obtained from stoichiometric equation and integral of the carbonyl stretching vibration (C=O) band of rice and quinoa starch esters in the range of (1781–690 cm−1).
| Rice Starch | |||||
| Acetate | Propionate | Butyrate | |||
| Acyl (%) |
Integral (1781–1690) (cm−1) |
Acyl (%) |
Integral (1781–1690) (cm−1) |
Acyl (%) |
Integral (1781–1690) (cm−1) |
| 0.95 | 2.31 ± 0.17 | 1.06 | 1.65 ± 0.14 | 1.38 | 1.55 ± 0.09 |
| 1.85 | 4.67 ± 0.62 | 2.02 | 3.47 ± 0.07 | 2.76 | 3.63 ± 0.11 |
| 2.70 | 7.16 ± 0.23 | 3.29 | 5.84 ± 0.17 | 4.09 | 6.41 ± 0.41 |
| 3.49 | 9.52 ± 0.38 | 4.28 | 7.89 ± 0.65 | 5.14 | 9.61 ± 0.45 |
| Quinoa Starch | |||||
| Acetate | Propionate | Butyrate | |||
| Acyl (%) |
Integral (1781–1690) (cm−1) |
Acyl (%) |
Integral (1781–1690) (cm−1) |
Acyl (%) |
Integral (1781–1690) (cm−1) |
| 0.87 | 1.41 ± 0.12 | 1.04 | 0.96 ± 0.06 | 1.03 | 1.19 ± 0.09 |
| 1.72 | 3.39 ± 0.32 | 2.19 | 2.51 ± 0.05 | 2.53 | 2.66 ± 0.03 |
| 2.54 | 5.00 ± 0.52 | 3.25 | 4.07 ± 0.15 | 3.73 | 4.12 ± 0.09 |
| 3.42 | 6.41 ± 0.08 | 4.12 | 5.34 ± 0.06 | 4.84 | 5.51 ± 0.10 |