Extraction of oil from chia seed.
|Methods of extraction||Details|
|Seed compression||(i) Cold pressing technique and storage at low temperature (4°C) in dark . |
(ii) Komet screw press at 25–30°C using electrical resistance heating.
(1) Pro: better preservation of antioxidant contents (quercetin and myricetin) than solvent extraction .
(2) Con: only partial recovery of oil yield .
|Solvent||(i) Soxhlet method using n-Hexane (less preferable than other methods). |
(1) Pro: it favors the functional characteristics of the oil such as water holding and absorption capacity, organic molecule absorption, and emulsifying stability.
(2) Con: it causes slight loss of antioxidant content  and health and environment safety issues of using hexane .
|Supercritical fluids||(i) Use of carbon dioxide at optimum pressure P = 408 and 80°C (more preferable method). |
(1) Pros: better purity and higher ALA/LA content of the final products [39, 40]. The oil yield can be increased with pressure enhancement, but high temperature will slightly affect it .