کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1204863 965171 2009 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Clean recovery of antioxidant flavonoids from onions: Optimising solvent free microwave extraction method
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
Clean recovery of antioxidant flavonoids from onions: Optimising solvent free microwave extraction method
چکیده انگلیسی

A solvent free microwave hydrodiffusion and gravity extraction (MHG) of flavonol content from onion (Allium cepa L.) was studied. Effectiveness of this innovative method in extraction of onion total phenolic content, total quercetin (TQ), quercetin aglycon (QA), quercetin-3,4′-diglucoside (QDG), quercetin-4′-monoglucoside (Q4G), quercetin-3-monoglucoside (Q3G), kaempferol (KMF) and myricetin (MRT) have been evaluated and compared with conventional solvent extraction. Microwave extraction offers important advantages like shorter extraction time (23 min), cleaner feature (no solvent or water used) and extraction of valuable onion crude juice retaining fresh organoleptic properties with higher phenolic content (58.29 mg GAE/g DW) at optimized power (500 W). Microwave extraction resulted significant yield (81.5%) with 41.9% of flavonol contents, with better retain of remaining flavonoids (55.9%) in residues of onions. QDG (239.7 mg/100 g DW) and Q4G (82.55 mg/100 g DW) have been reported the main flavonol in this study. Minor quantities of QA (traces), Q3G (4.22 mg/100 g DW) and KMF (3.99 mg/100 g DW) were also detected in microwave onion extracts.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Chromatography A - Volume 1216, Issue 45, 6 November 2009, Pages 7700–7707
نویسندگان
, , , ,