کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4914586 1362626 2018 6 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Enhanced extraction of flavonoids from Odontonema strictum leaves with antioxidant activity using supercritical carbon dioxide fluid combined with ethanol
کلمات کلیدی
Odontonema strictum; Supercritical fluid extraction; Total flavonoid content; Response surface methodology; Antioxidant activity;
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Enhanced extraction of flavonoids from Odontonema strictum leaves with antioxidant activity using supercritical carbon dioxide fluid combined with ethanol
چکیده انگلیسی

•Flavonoids have been extracted using Supercritical fluid extraction method.•Flavonoids contents is higher in supercritical extracts than the conventional.•The response surface methodology allowed prediction of the optimum conditions.•Supercritical extracts presented higher antioxidant activity.

Flavonoids were extracted from Odontonema strictum leaves by supercritical carbon dioxide, with ethanol. The effect of three independents variables (time, pressure and temperature) on the Total Flavonoid Content (TFC) were optimized by factorial investigation. The TFC and flavonoid recovery varies respectively from 99.33 to 247.78 mg/g of dried extract and 10.68–18.92 mg/g of dried leaves powder, while the conventional solvent extraction (CSE) yielded 36.45 mg/g and 3.13 mg/g. Analysis of the factorial identified the optimal conditions with an extraction time of 270 min and a pressure of 200 bar, the temperature had no effect within the tested ranges. The predicted TFC was 203.11 mg/g under optimal conditions and experimentally 230.48 mg/g. The antioxidant activity with 2,2-Diphenyl-1-picrylhydrazyl method of the extracts under optimum conditions was 49.21% while the CSE extract was 37.05%. The TLC analysis of the supercritical fluid extracts from the optimum conditions showed 5 majors flavonoids.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: The Journal of Supercritical Fluids - Volume 131, January 2018, Pages 66-71
نویسندگان
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