Polyethylene glycol-based ultrasound-assisted extraction of magnolol and honokiol from Cortex Magnoliae Officinalis |
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Authors: | Lei He Tao Fan Jianguo Hu |
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Institution: | Department of Food Science and Nutrition, School of Hotel Management, University of Jinan, No. 13, Shungeng Road, Jinan, Shandong 250002, P.R. China |
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Abstract: | In this study, a kind of green solvent named polyethylene glycol (PEG) was developed for the ultrasound-assisted extraction (UAE) of magnolol and honokiol from Cortex Magnoliae Officinalis. The effects of PEG molecular weight, PEG concentration, sample size, pH, ultrasonic power and extraction time on the extraction of magnolol and honokiol were investigated to optimise the extraction conditions. Under the optimal extraction conditions, the PEG-based UAE supplied higher extraction efficiencies of magnolol and honokiol than the ethanol-based UAE and traditional ethanol-reflux extraction. Furthermore, the correlation coefficient (R2), repeatability (relative standard deviation, n = 6) and recovery confirmed the validation of the proposed extraction method, which were 0.9993–0.9996, 3.1–4.6% and 92.3–106.8%, respectively. |
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Keywords: | PEG ultrasound-assisted extraction Cortex Magnoliae Officinalis magnolol honokiol |
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