Department of Food Science, College of Agriculture, University of Tabriz, Tabriz, Iran.
Food and Drug Safety Research Center, Health Management and Safety Promotion Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran.
J Sci Food Agric. 2020 Jan 15;100(1):74-80. doi: 10.1002/jsfa.9995. Epub 2019 Oct 8.
Infrared (IR)-assisted spouted bed drying (SBD) has emerged as a potential alternative to the traditional hot air drying for heat sensitive components. The aim of this study was to investigate effect of IR-assisted SBD and application of cold press (CP), solvent extraction (SE) and ultrasound assisted extraction (UAE) on the quality of flaxseed oil. SBD and IR-assisted SBD were performed at air temperatures of 40, 60, 80 °C and their effects on the drying rate, fatty acids composition and oil peroxide and acid values were evaluated. Quality of oil extracted from the dried flaxseeds by CP, SE and UAE methods was then evaluated.
Increasing air temperature in the presence of IR increased the drying rate. The peroxide values (PVs) of IR-SBD samples were higher than those of SBD at the same temperature. IR treatment did not notably change the composition of fatty acids in flaxseed oil, except in linoleic acid content. UAE gave higher extraction yield than CP and SE methods. UAE yielded an oil with higher percentage of saturated fatty acids, whereas the percentage of omega-3 and omega-6 fatty acids was higher in the CP method. The oil extracted by CP exhibited lower levels of PV (0.516 meq O /kg oil) and acid value (1.36%), as compared to oils extracted by SE and UAE methods.
Both UAE and conventional methods did not significantly influence the composition of fatty acids in the extracted oils. Nonetheless, the CP method yielded an oil with a high percentage of omega-3 and omega-6 fatty acids. © 2019 Society of Chemical Industry.
红外（IR）辅助喷射床干燥（SBD）已成为热敏性成分替代传统热空气干燥的潜在方法。本研究旨在研究 IR 辅助 SBD 以及冷榨（CP）、溶剂萃取（SE）和超声辅助提取（UAE）的应用对亚麻籽油质量的影响。在空气温度为 40、60、80°C 的条件下进行 SBD 和 IR 辅助 SBD，并评估其对干燥速率、脂肪酸组成以及油过氧化物和酸值的影响。然后评估通过 CP、SE 和 UAE 方法从干燥亚麻籽中提取的油的质量。
IR 存在下空气温度的升高增加了干燥速率。IR-SBD 样品的过氧化物值（PV）高于相同温度下的 SBD。IR 处理不会显著改变亚麻籽油中脂肪酸的组成，除了亚油酸含量。UAE 的提取收率高于 CP 和 SE 方法。UAE 得到的油中饱和脂肪酸的百分比更高，而 CP 方法中 ω-3 和 ω-6 脂肪酸的百分比更高。与 SE 和 UAE 方法提取的油相比，CP 提取的油的过氧化物值（0.516 meq O/kg 油）和酸值（1.36%）较低。
UAE 和常规方法均未显著影响提取油中脂肪酸的组成。然而，CP 方法得到的油中 ω-3 和 ω-6 脂肪酸的百分比较高。© 2019 化学工业协会。
