Research Article
The Effect of Extraction Conditions on Chemical and Thermal Characteristics of Kappa-Carrageenan Extracted from Hypnea bryoides
Table 1
Properties of Carrageenan extracted from Hypnea bryoides under different alkali pre-treatment conditions.
| Treatment | Yield | | Sulfate | NaOH | Time | Temp. | (% w/w)1 ± SD | (Dalton) ± SD | (% w/w)1 ± SD | (w/v) | (h) | (°C) |
| 4% | 2 | 70 | 21.72. ± 3.61 | (13.15 ± 0.64) × 105 | 07.62 ± 5.52 | 75 | 23.44 ± 0.01 | (11.50 ± 1.27) × 105 | 17.42 ± 2.97 | 80 | 14.86 ± 3.72 | (07.00 ± 7.20) × 105 | 19.22 ± 0.14 | 2.75 | 70 | 17.62 ± 3.17 | (12.85 ± 1.30) × 105 | 15.12 ± 3.68 | 75 | 18.95 ± 2.59 | (11.30 ± 0.57) × 105 | 13.82 ± 9.19 | 80 | 13.24 ± 3.85 | (07.50 ± 6.51) × 105 | 20.52 ± 0.00 | 3.5 | 70 | 21.90 ± 0.05 | (13.10 ± 0.14) × 105 | 15.92 ± 0.00 | 75 | 15.12 ± 2.60 | (12.20 ± 0.00) × 105 | 18.82 ± 3.82 | 80 | 09.37 ± 2.37 | (12.40 ± 0.00) × 105 | 21.22 ± 1.27 |
| 6% | 2 | 70 | 23.06 ± 5.06 | (11.80 ± 0.00) × 105 | 11.82 ± 4.38 | 75 | 11.87 ± 1.53 | (11.70 ± 0.71) × 105 | 16.42 ± 0.99 | 80 | 15.21 ± 3.62 | (11.30 ± 0.00) × 105 | 15.82 ± 3.25 | 2.75 | 70 | 16.95 ± 7.39 | (10.20 ± 0.14) × 105 | 14.02 ± 7.78 | 75 | 10.15 ± 3.73 | (10.00 ± 1.84) × 105 | 16.72 ± 0.28 | 80 | 12.16 ± 3.99 | (06.65 ± 5.44) × 105 | 09.82 ± 2.40 | 3.5 | 70 | 26.74 ± 5.01 | (13.90 ± 0.14) × 105 | 17.02 ± 0.14 | 75 | 11.06 ± 2.62 | (10.90 ± 1.41) × 105 | 16.52 ± 2.26 | 80 | 12.69 ± 6.37 | (06.10 ± 6.93) × 105 | 15.42 ± 2.69 |
| 8% | 2 | 70 | 11.58 ± 1.79 | (12.30 ± 1.13) × 105 | 19.62 ± 0.99 | 75 | 11.30 ± 0.74 | (12.35 ± 0.49) × 105 | 25.52 ± 1.70 | 80 | 10.24 ± 1.07 | (07.25 ± 6.15) × 105 | 21.52 ± 0.00 | 2.75 | 70 | 10.85 ± 1.97 | (07.10 ± 7.07) × 105 | 20.92 ± 1.98 | 75 | 11.06 ± 0.96 | (05.95 ± 0.49) × 105 | 25.32 ± 2.26 | 80 | 08.22 ± 0.34 | (07.90 ± 5.23) × 105 | 24.72 ± 1.41 | 3.5 | 70 | 17.38 ± 2.39 | (08.05 ± 7.14) × 105 | 23.92 ± 4.81 | 75 | 07.58 ± 0.77 | (11.25 ± 0.21) × 105 | 28.12 ± 0.57 | 80 | 06.59 ± 0.09 | (06.75 ± 6.58) × 105 | 21.72 ± 0.85 |
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