Enhancement of omega-3 content in sacha inchi seed oil extracted with supercritical carbon dioxide in semi-continuous process

Physical and chemical characterization of oil extracted from Citrofortunella microcarpa, Hibiscus sabdariffa and Artocarpus heterophyllus seeds

“…Therefore, a ratio of ~0.15 was calculated for both calamansi and roselle oil. The degree of unsaturation was lower than seed oil of sacha inchi (~0.60) [20], fig (~0.36) [21] and Lepidium sativum (~0.24) [25]. For peak at 1744.93 cm -1 , shows presence of carbonyl (C=O) stretching of esters.…”

“…3b) seed oils have shown similar peak characteristics. In the spectra obtained for calamansi and roselle seed oils in the diagnostic region, the peaks at 3008.32 cm -1 resulted from the vibrations of the cis olefinic CH double bonds (=C-H) [20]. While, 2923.86 cm -1 and 2855.53 cm -1 suggested the methylene (-C-H) asymmetrical and symmetrical stretchings.…”

“…The percentage of oil yield obtained from jackfruit seed in the present study was lesser than Madrigal-Aldana et al [19], where they studied the jackfruit seed in two stages of ripeness, i.e., physiological mature and consumption ripeness. Seed oil yields obtained from the present study (Table 1) were also compared with oil yields from seeds of sacha inchi [20], fig [21], Gmelina arborea [22], Maesa lanceolata [23] and Croton macrostachyus [24] as they similarly performed oil extraction using Soxhlet apparatus and hexane as solvent but with different extraction time. Mean value ± standard deviation (n=2)…”

“…The proportion of polyunsaturated fatty acids in edible oil could be indicated by these vibrations. The degree of unsaturation was determined from the ratio of absorptions of peaks at 3008.32 cm -1 and 2855.53 cm -1 [20]. Therefore, a ratio of ~0.15 was calculated for both calamansi and roselle oil.…”

“…Saponification values obtained for both unheated calamansi and roselle seed oil from the present study were slightly different from previous studies done by Manaf et al [9] and Bouanga-Kalou et al [18] where they reported saponification values of calamansi and roselle seed oils of 192.6 and 198.45 mg KOH/g oil, respectively. Other seed oils such as sacha inchi [20] and fig [21] had saponification values of 190.2 and 201.6 mg KOH/g oil, respectively. Heating duration (min)…”