Table 2.
Extraction yield (%) obtained from selected seaweed species using UAE and conventional solvent extraction techniques.
| Seaweed Species | Extraction Yield (%) | |
|---|---|---|
| UAE | Conventional | |
| Pelvetia caniculata | 20.5 ± 0.35 h | 14.0 ± 0.28 e |
| Fucus vesiculosus | 35.1 ± 0.33 b | 11.2 ± 0.29 g |
| Laminaria saccharina | 30.9 ± 0.41 d | 17.0 ± 0.47 c |
| Laminaria hyperborea | 36.9 ± 0.11 a | 19.3 ± 0.21 a |
| Fucus spiralis | 25.2 ± 0.50 f | 14.7 ± 0.45 de |
| Ascophyllum nodosum | 24.4 ± 0.31 f | 12.7 ± 0.15 f |
| Fucus serratus | 20.4 ± 0.19 h | 10.5 ± 0.12 g |
| Himanthalia elongata | 23.4 ± 0.30 g | 15.0 ± 0.26 d |
| Halidrys siliquosa | 29.0 ± 0.25 e | 14.5 ± 0.31 de |
| Laminaria digitata | 29.4 ± 0.16 e | 18.4 ± 0.21 b |
| Alaria esculenta | 33.0 ± 0.06 c | 17.2 ± 0.09 c |
Results are expressed as average ± standard deviation (n = 6). Different letters indicate statistical differences (p < 0.05) between the yield of extracts obtained from multiple seaweed species by using UAE (lowercase letters) and conventional extraction conditions (italic letters). The extraction yield is calculated by using following formula: extraction yield (%) = (weight of dry extract / weight of dry sample) × 100.