Table 3.
Color parameters (mean ± standard deviation) of extrudates as a function of extrusion die temperature and butterfly pea flower (BP) concentration. Values in the same column followed by same letters are not significantly (p < 0.05) different (n = 2 for extrusion and n = 3 for color measurements).
| Blend | Die Temperature (°C) | L* | a* | b* | ΔE |
|---|---|---|---|---|---|
| Raw 0% BP | - | 89.46 ± 0.06 a | 0.73 ± 0.03 b | 16.05 ± 0.13 b | - |
| 0% BP | 130 | 83.15 ± 0.25 c | 2.04 ± 0.08 a | 22.91 ± 0.55 a | 9.42 ± 0.56 e |
| 150 | 80.72 ± 0.33 d | 1.73 ± 0.36 a | 22.25 ± 0.77 a | 10.79 ± 0.26 d | |
| Raw 5% BP | - | 84.30 ± 0.27 b | −1.13 ± 0.07 c | 11.15 ± 0.27 c | - |
| 5%BP | 130 | 50.86 ± 0.71 e | −4.32 ± 0.08 g | −8.62 ± 0.13 g | 38.98 ± 0.65 b |
| 150 | 49.68 ± 0.41 f | −4.59 ± 0.08 g | −4.31 ± 0.81 e | 38.08 ± 0.61 c | |
| Raw 10% BP | - | 80.15 ± 0.08 d | −1.71 ± 0.04 d | 9.33 ± 0.08 d | - |
| 10% BP | 130 | 43.39 ± 0.43 g | −2.80 ± 0.08 e | −11.32 ± 0.09 h | 42.17 ± 0.36 a |
| 150 | 41.84 ± 0.28 h | −3.35 ± 0.10 f | −6.74 ± 0.28 f | 41.58 ± 0.23 a |