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标题：NEUTRALIZATION OF SUNFLOWER SEED OIL BYCa(OH)2, MgO, AND Na2Si〇3AS AN ALTERNATIVE TO NaOH
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作者：Pinar Gumus ; Eric A Decker ; Medeni Maskan 等
期刊名称：Fresenius Environmental Bulletin
印刷版ISSN：1018-4619
出版年度：2020
卷号：29
期号：9
页码：7913-7921
语种：English
出版社：PSP Publishing
摘要：In recent years, consumer interest in healthy oils has been increasing. W hile undesirable minor components such as free fatty acids, pigments and gums and phospholipids are removed or decreased to acceptable levels by refining, some healthy desirable minor components such as phytosterols, tocopherols, carotenoids and polyphenolic components are also removed. Less refining can retain the healthy components but can also result in increased susceptibility of lip id oxidation by components such as free fatty acids. In this study, weak alkalines such as Ca(OH)2, MgO and Na2Sio3 were used to neutralize degummed sunflower o il instead of strong alkali (e.g. NaOH) which is used in conventional refining. The free fatty acid content after neutralizing w ith 0.15 % Ca(OH)2, 0.5 % MgO, 0.5 % Na2Sio3 and 0.2 % NaOH were 0.05, 0.07, 0.11 and 0,12 %, respectively. Total phenolic content of sunflower oils neutralized w ith 0.15 % Ca(OH)2, 0.5 % MgO 0.5 % Na2SiO3 and 0.2 %o NaOH were 0.89, 1.14, 1.23 and 1.38 mg caffeic acid equivalent/100 g oil, respectively. Oils neutralized by Ca(OH)2, MgO and Na2SiO3 had lower FFA (free fatty acid) than degummed o il and o il neutralized by NaOH and also had better oxidative stability suggesting that they could be more effective in producing a high quality oil.
关键词：Sunflower oil;minimal neutralization;antioxidant activity;lipid oxidation