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For edible oils, the tolerated limit of unsaponifiable matter is 1.5% (olive, refined soybean), while inferior quality crude or pomace oil could reach 3%. [12] [13] Determination of unsaponifiables involves a saponification step of the sample followed by extraction of the unsaponifiable using an organic solvent (i.e. diethyl ether).
Sunflower oil is commonly used in food as a frying oil, and in cosmetic formulations as an emollient. Sunflower oil is primarily composed of linoleic acid, a polyunsaturated fat, and oleic acid, a monounsaturated fat. Through selective breeding and manufacturing processes, oils of differing proportions of the fatty acids are produced. [1]
Rice bran oil is the oil extracted from the hard outer brown layer of rice called bran. It is known for its high smoke point of 232 °C (450 °F) and mild flavor, making it suitable for high-temperature cooking methods such as stir frying and deep frying .
Sesame oil is a polyunsaturated (PUFA) semi-drying oil. Commercial sesame oil varies in color from light to deep reddish-yellow depending on the color of the seed processed and the method of milling. Provided that the oil is milled from well-cleaned seed, it can be refined and bleached easily to yield a light-colored limpid oil.
Olive pomace oil is olive oil that is extracted from olive pulp after the first press. Once the mechanical oil extraction of olive oil is complete, approximately 5–8% of the oil remains in the pulp, which then needs to be extracted with the help of solvents, an industrial technique used in the production of most other edible oils including canola, peanut, and sunflower.
Poppyseed oil (also poppy seed oil and poppy oil) is an edible oil obtained from poppy seeds (specifically seeds of Papaver somniferum, the opium poppy). Poppy seeds yield 45–50% oil. [ 3 ] Like poppy seeds, poppyseed oil is highly palatable, high in vitamin E , and has no narcotic properties.