한빛사 논문
한국식품연구원, UST
Abstract
Ahmad Rois Mansura, b, Nho-Eul Songa, Hae Won Janga, Tae-Gyu Lima, Miyoung Yooa, Tae Gyu Nama,*
a Korea Food Research Institute, Wanju 55365, Republic of Korea
b Department of Food Biotechnology, Korea University of Science and Technology, Daejeon 34113, Republic of Korea
*Corresponding author : Tae Gyu Nam
Abstract
In this study, deep eutectic solvents (DESs) coupled with ultrasound-assisted extraction (UAE) were evaluated and optimized for the extraction of major flavonoids from common buckwheat sprouts. Initially, 18 different choline chloride (CC)-based DESs were evaluated as potential extraction solvents, and 80% CCTG (CC-based DES composed of triethylene glycol and 20 vol% water) extracted significantly higher (p < 0.05) amounts of flavonoids than other DESs studied. The extraction efficiency of 80% CCTG was even higher (p < 0.05) than that of methanol for the extraction of vitexin and quercetin-3-O-robinobioside. Procedure using 80% CCTG and UAE were optimized; an extraction temperature of 56 °C and extraction time of 40 min were considered optimal. The optimized extraction procedure was reliable and efficient for the extraction of major flavonoids from common buckwheat sprouts. In addition, flavonoids could be efficiently recovered from DES extracts with high recovery yields (>97%) by using a C18 solid-phase extraction.
Keywords : Deep eutectic solvents; Common buckwheat sprouts; Flavonoids; Optimum extraction; Response surface methodology
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