بررسی اثر آنتی‌اکسیدانی عصاره اتانولی ژل آلوئه‌ورا بر پایداری روغن سویا

مجله پژوهشهای علوم و صنایع غذایی ایران

مقاله 11، دوره 19، شماره 4 - شماره پیاپی 82، مهر و آبان 1402، صفحه 541-556   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/ifstrj.2022.77602.1189

نویسندگان

مرجان کرمی؛ لیلا ناطقی^* ؛ سیمین اسداللهی

گروه علوم و صنایع غذایی، واحد ورامین– پیشوا، دانشگاه آزاد اسلامی، ورامین، ایران

چکیده

اکسیداسیون چربی­ها از مهم­ترین دلیل فساد مواد غذایی به شمار می­آید. سرعت واکنش اکسیداسیون را می‌توان با اضافه کردن آنتی‌اکسیدان­ها به تأخیر انداخت. در این مطالعه اثر آنتی‌اکسیدانی عصاره‌ اتانولی آلوئه‌ورا بر پایداری روغن سویا مورد مطالعه قرار گرفت. ترکیبات موجود در عصاره آلوئه ورا با استفاده از GC/MS شناسایی شدند. بررسی خاصیت آنتی‌اکسیدانی با اندازه‌گیری مقدار ترکیلات فنلی و فلاونوئیدی عصاره اتانولی و آزمون رادیکال‌کنندگی DPPH صورت گرفت و در ادامه عصاره آلوئه‌ورا در چهار سطح ( ppm500،1000،1500،2000) و آنتی‌اکسیدان سنتزیBHA ، در سطح 120ppm  به روغن سویا اضافه و عدد پراکسید، اسیدیته، تیوباربیتوریک اسید و پایداری اکسایشی به روش رنسیمت اندازه‌گیری شد. نتایج نشان داد با افزایش غلظت عصاره­های آلوئه­ورا از 500 تا 2000 ppm، فساد اکسیداتیو با روند کندتری طی 90 روز نگهداری در روغن سویا مشاهده گردید. پس از 90 روز نگهداری، میزان عدد پراکسید، تیوباربیتوریک اسید و اسیدیته نمونه روغن سویا حاوی ppm 2000 عصاره اتانولی ژل آلوئه­ورا از نمونه شاهد که حاوی  ppm BHA120 بود کمتر بود. میزان فنل کل و مهار رادیکال آزاد و پایداری به فساد اکسیداتیو به روش رنسیمت در نمونه روغن سویا حاوی ppm 2000 عصاره اتانولی ژل آلوئه­ورا از نمونه روغن سویا که حاوی ppm BHA120 بود بالاتر بود. با توجه به اینکه نمونه روغن سویای حاوی ppm 2000 عصاره اتانولی ژل آلوئه­ورا میزان فنل کل و مهار رادیکال آزاد و خصوصیات آنتی­اکسیدانی بیشتری نسبت به نمونه شاهد داشت بنابراین نمونه مذکور از نظر خواص کیفی و سلامت بخشی به عنوان تیمار برتر انتخاب گردید.

کلیدواژه‌ها

اثر آنتی‌اکسیدانی؛ روغن سویا؛ ژل آلوئه‌ورا؛ عصاره اتانولی

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