Abstract
Chinese hickory (Carya cathayensis Sarg.) is one of the most productive woody oil-bearing plant in China. Four different extraction methods were explored and supercritical CO2 was selected as green and non-toxic solvent to extract Chinese kernel oil. Four experiment factors, particles size, extraction time, extraction temperature and extraction pressure, were selected to carry out the single factor experiments. According to the results of orthogonal experiments design, the condition of B3C2A2D2 was the optimum reaction parameters. When the experiments were carried out at the optimum parameters, the yield of Chinese hickory kernel oil was 74.5%. The oil fatty acids profiles were analyzed, the results showed that total unsaturated fatty acids were 93.05%. Among them, oleic acid was 66.5 ± 0.44 as the main component. Saturated fatty acids were 6.92 ± 0.21.
Highlights
IntroductionFood safety draws a lot of attention. In ordinary daily life, edible oil is usually used to cook almost in every dish
In recent years, food safety draws a lot of attention
The oil fatty acids profiles were analyzed, the results showed that total unsaturated fatty acids were 93.05%
Summary
Food safety draws a lot of attention. In ordinary daily life, edible oil is usually used to cook almost in every dish. The plant-based oils that obtained from fruits seeds and vegetables are usually processing by screw pressing, solvent extraction and cold pressing [1] [2] [3]. Many researchers pay more attention to supercritical fluid extraction technology as an important alternative to the traditional separation methods. Supercritical fluid extraction technology has advantages: mild critical point (critical temperature 31.7 ̊C and critical pressure around 7 MPa) green, high yields, no residue, non-toxicity, low cost and high selectivity to non-polar molecules [8]. Firstly supercritical CO2 as the solvent was applied to extraction kernel oil of China hickory and several extraction parameters such as pressure, temperature and particle size were studied on the extraction yield of kernel oil of Chinese Hickory. The fatty acid profiles of Chinese hickory samples from extraction by supercritical CO2 were determined by GC-MS
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