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Journal of Analytical Methods in Chemistry
Volume 2014 (2014), Article ID 864654, 7 pages
http://dx.doi.org/10.1155/2014/864654
Research Article

Optimization of Ultrasonic Extraction of Phenolic Compounds from Epimedium brevicornum Maxim Using Response Surface Methodology and Evaluation of Its Antioxidant Activities In Vitro

1College of Chinese Medicinal Materials, Jilin Agricultural University, No. 2888 Xincheng Street, Changchun, Jilin 130118, China
2College of Traditional Chinese Medicine, Jilin Agricultural Science and Technology University, Jilin 132101, China

Received 2 July 2014; Revised 7 August 2014; Accepted 15 October 2014; Published 12 November 2014

Academic Editor: Verónica Pino

Copyright © 2014 Yan Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The ultrasound-assisted extraction of phenolic compounds from Epimedium brevicornu Maxim was modeled using response surface methodology. A Central Composite Design (CCD) was employed to optimize three extraction variables, including ethanol concentration (X1), extraction time (X2), and ratio of aqueous ethanol to raw material (X3), for the achievement of high extraction yield of the phenolic compounds. The optimized conditions are X1 of 50% (v/v), X2 of 27.5 min, and X3 of 250 mL/g. Under these conditions, the experimental yield is 4.29 ± 0.033% . The antioxidant activity was evaluated using the DPPH assay and ferric-reducing antioxidant power (FRAP). And it indicates that the phenolic compounds from Epimedium brevicornu Maxim possess significant antioxidant activity. HPLC analysis reveals that the main phenolic compound in the extract product was identified as gallic acid, catechin (Cianidanol), p-hydroxybenzoic acid, vanillic acid, caffeic acid, ferulaic acid, rutin, benzoic acid, and quercetin.