تأثیر شرایط استخراج بر بازده تانن و ترکیبات فنولی پوست و جفت بلوط

مجله پژوهشهای علوم و صنایع غذایی ایران

دوره 21، شماره 4 - شماره پیاپی 94، مهر و آبان 1404، صفحه 463-476   

نوع مقاله: مقاله کوتاه

شناسه دیجیتال (DOI): 10.22067/ifstrj.2025.93451.1432

نویسندگان

زهرا زارع زاده¹؛ علی فروهر²؛ حامد صابریان^{* 3}

¹گروه مهندسی شیمی، دانشگاه صنعتی اصفهان، اصفهان، ایران

²گروه علوم و مهندسی صنایع غذایی، دانشگاه صنعتی اصفهان، اصفهان، ایران

³گروه پژوهشی فرآوری پسماند و ضایعات کشاورزی، جهاد دانشگاهی واحد صنعتی اصفهان، اصفهان، ایران

چکیده

این پژوهش با هدف بهینه‌سازی استخراج تانن و ترکیبات فنولی از بلوط (پوست و جفت) انجام شد. در مرحله نخست، بازده استخراج عصاره فنولی از مخلوط پوست و جفت با استفاده از حلال‌های مختلف (آبی، قلیایی و اتانول) و در دو دمای 60 و 90 درجه سلسیوس مورد ارزیابی قرار گرفت. سپس، محتوای فنول کل و تانن عصاره‌های استخراج شده مورد ارزیابی قرار گرفت. نتایج نشان داد که افزایش دما، به‌ویژه در حضور حلال قلیایی (سود 0.22 %)، بازده استخراج تانن از مخلوط پوست و جفت را به‌طور معنی‌داری از 30.80 به 39.64 % افزایش داد. اتانول نیز در مقایسه با آب، بازده استخراج بالاتری را نشان داد. آنالیز ترکیبات فنولی کل نشان داد که جفت بلوط به‌طور قابل توجهی غنی‌تر از پوست است و استخراج با اتانول و استخراج قلیایی در دمای بالا، بالاترین بازده فنول کل را به همراه داشت. با این حال، برای استخراج تانن از مخلوط پوست و جفت، اتانول با بازده 51.41% کارآمدترین حلال بود. ارزیابی تانن با روش کروماتوگرافی مایع با کارایی بالا مقادیر بالاتری را نسبت به روش‌های شیمیایی نشان داد و میزان تانن در مخلوط پوست و جفت (48.06 %) و جفت (61.23 %) را تأیید کرد.

کلیدواژه‌ها

استخراج با حلال؛ بلوط؛ تانن؛ ترکیبات پلی فنولی

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