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Molecules 2014, 19(1), 67-77; doi:10.3390/molecules19010067
Article

Optimized Ultrasound-Assisted Extraction of Phenolic Compounds from Polygonum cuspidatum

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Received: 23 October 2013 / Revised: 14 November 2013 / Accepted: 26 November 2013 / Published: 20 December 2013
(This article belongs to the collection Bioactive Compounds)
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Abstract

In this study the phenolic compounds piceid, resveratrol and emodin were extracted from P. cuspidatum roots using ultrasound-assisted extraction. Multiple response surface methodology was used to optimize the extraction conditions of these phenolic compounds. A three-factor and three-level Box-Behnken experimental design was employed to evaluate the effects of the operation parameters, including extraction temperature (30–70 °C), ethanol concentration (40%–80%), and ultrasonic power (90–150 W), on the extraction yields of piceid, resveratrol, and emodin. The statistical models built from multiple response surface methodology were developed for the estimation of the extraction yields of multi-phenolic components. Based on the model, the extraction yields of piceid, resveratrol, and emodin can be improved by controlling the extraction parameters. Under the optimum conditions, the extraction yields of piceid, resveratrol and emodin were 10.77 mg/g, 3.82 mg/g and 11.72 mg/g, respectively.
Keywords: ultrasound-assisted extraction; Polygonum cuspidatum; piceid; resveratrol; emodin; RSM ultrasound-assisted extraction; Polygonum cuspidatum; piceid; resveratrol; emodin; RSM
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.

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Kuo, C.-H.; Chen, B.-Y.; Liu, Y.-C.; Chang, C.-M.J.; Deng, T.-S.; Chen, J.-H.; Shieh, C.-J. Optimized Ultrasound-Assisted Extraction of Phenolic Compounds from Polygonum cuspidatum. Molecules 2014, 19, 67-77.

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