Research Article
Process Optimisation of Ultrasound-Assisted Extraction of Oligosaccharides from Coconut Husk
Table 2
Experimental design matrix FrFD (run 1 to run 22) and augmented RSM (run 23 to run 34) and responses.
| | Run | Experimental factorsa | Responsesb | | X1 | X2 | X3 | X4 | X5 | Y1 | Y2 | Y3 |
| | 1 | +1 (50) | +1 (45) | +1 (250) | −1 (1) | +1 (150) | 31.58 | 7.31 | 4.32 | | 2 | +1 (50) | −1 (5) | +1 (250) | +1 (12) | −1 (50) | 83.16 | 16.61 | 5.01 | | 3 | −1 (30) | +1 (45) | +1 (250) | +1 (12) | −1 (50) | 52 | 19.85 | 2.62 | | 4 | 0 (40) | 0 (25) | 0 (137.5) | 0 (6.5) | 0 (100) | 38.82 | 11.56 | 3.36 | | 5 | −1 (30) | −1 (5) | −1 (25) | −1 (1) | −1 (50) | 19.9 | 11 | 1.81 | | 6 | −1 (30) | −1 (5) | +1 (250) | −1 (1) | +1 (150) | 13.78 | 6.66 | 2.07 | | 7 | 0 (40) | 0 (25) | 0 (137.5) | 0 (6.5) | 0 (100) | 40.64 | 12.3 | 3.3 | | 8 | 0 (40) | 0 (25) | 0 (137.5) | 0 (6.5) | 0 (100) | 40.64 | 12.3 | 3.3 | | 9 | +1 (50) | −1 (5) | −1 (25) | +1 (12) | +1 (150) | 37.79 | 4.97 | 7.61 | | 10 | +1 (50) | +1 (45) | −1 (25) | −1 (1) | −1 (50) | 39.26 | 29.62 | 1.33 | | 11 | −1 (30) | +1 (45) | −1 (25) | +1 (12) | +1 (150) | 45.39 | 21.48 | 2.11 | | 12 | +1 (50) | −1 (5) | +1 (250) | −1 (1) | −1 (50) | 29.11 | 21.32 | 1.37 | | 13 | +1 (50) | −1 (5) | −1 (25) | −1 (1) | +1 (150) | 14.05 | 5.71 | 3.84 | | 14 | 0 (40) | 0 (25) | 0 (137.5) | 0 (6.5) | 0 (100) | 64.93 | 10.11 | 6.42 | | 15 | −1 (30) | +1 (45) | +1 (250) | −1 (1) | −1 (50) | 31.43 | 28.33 | 1.11 | | 16 | −1 (30) | −1 (5) | −1 (25) | +1 (12) | −1 (50) | 88.59 | 15.29 | 5.79 | | 17 | −1 (30) | −1 (5) | +1 (250) | +1 (12) | +1 (150) | 39.15 | 4.73 | 8.28 | | 18 | +1 (50) | +1 (45) | −1 (25) | +1 (12) | −1 (50) | 68.41 | 22.86 | 2.99 | | 19 | +1 (50) | +1 (45) | +1 (250) | +1 (12) | +1 (150) | 33.03 | 8 | 4.13 | | 20 | −1 (30) | +1 (45) | −1 (25) | −1 (1) | +1 (150) | 20.06 | 5.48 | 3.66 | | 21 | 0 (40) | 0 (25) | 0 (137.5) | 0 (6.5) | 0 (100) | 43.77 | 7.99 | 5.44 | | 22 | 0 (40) | 0 (25) | 0 (137.5) | 0 (6.5) | 0 (100) | 37.64 | 9.2 | 4.09 | | 23 | −1 (30) | −1 (5) | +1 (250) | 0 (6.5) | −1 (50) | 29.48 | 11.65 | 2.53 | | 24 | −1 (30) | +1 (45) | +1 (250) | 0.333 (8.3) | +1 (150) | 36.05 | 3.72 | 9.68 | | 25 | 0 (40) | −1 (5) | +1 (250) | +1 (12) | −1 (50) | 81.71 | 14.2 | 5.75 | | 26 | +1 (50) | −0.333 (18.3) | −1 (25) | −1 (1) | −0.333 (83.3) | 34.82 | 11.55 | 3.01 | | 27 | −1 (30) | +1 (45) | −0.33 (100) | −1 (1) | −0.333 (83.3) | 30.45 | 7.75 | 3.93 | | 28 | +1 (50) | −1 (5) | +1 (250) | −0.333 (4.7) | +1 (150) | 42.36 | 5.12 | 8.26 | | 29 | +1 (50) | +1 (45) | +1 (250) | 0.333 (8.3) | −0.333 (83.3) | 74.56 | 19.45 | 3.83 | | 30 | +1 (50) | −1 (5) | −0.333 (100) | −0.333 (4.7) | −1 (50) | 76.81 | 15.45 | 4.97 | | 31 | +1 (50) | −0.333 (18.3) | −1 (25) | −1 (1) | −0.333 (83.3) | 34.57 | 12.37 | 2.79 | | 32 | 0 (40) | −1 (5) | +1 (250) | +1 (12) | −1 (50) | 76.79 | 11.73 | 6.54 | | 33 | −1 (30) | −0.333 (18.3) | −0.333 (100) | −1 (1) | +1 (150) | 33.54 | 4.84 | 6.94 | | 34 | −1 (30) | +0.333 (31.7) | −1 (25) | −0.333 (4.7) | −1 (50) | 78.84 | 14.18 | 5.56 |
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aFactors: X1, temperature (°C); X2, time (min); X3, power (watt); X4, sodium hydroxide concentration (%w/v); X5, solid-to-liquid ratio. Uncoded values are presented in the brackets. bResponses: Y1, TC (mg/mL); Y2, TRS (mg/mL); Y3, DP.
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