The emission bands at 375, 525 and 673 nm that represent vitamin E/beta-carotene and chlorophyll, are present only in canola oil samples extracted by chemical and cold press methods and absolutely absent from all commercial brands.
How is canola oil extracted?
Canola oil is extracted by slightly heating the crushed canola seeds dissolved in the hexane solvent or by cold press method [ 4 ]. Finally, it is refined using water precipitation and organic acid to remove gums and free fatty acids, filtering to remove color, and deodorizing using steam distillation [ 4 ].
Does canola oil extraction method affect nutritional values?
Fluorescence spectroscopy along with chemometric analysis have been employed to study the effect of extraction methods on the nutritional values of canola oil. It has been found that canola oil extracted by cold press method is rich with fat soluble vitamins, vitamin E, beta carotene and chlorophylls.
What is canola oil?
Canola oil is extracted from rapeseed and consumed all over the world due to its valuable ingredients [ 1 ]. It has a low amount of saturated and a substantial amount of monounsaturated fats with roughly 2:1 mono to polyunsaturated fatty acids [ 2 ].