Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7595391 | Food Chemistry | 2015 | 7 Pages |
Abstract
A novel and effective extraction method, namely negative pressure cavitation-microwave assisted extraction technique (NMAE), was developed for the preparation of extracts of Pyrola incarnata Fisch., which are rich in the main constituents hyperin, 2â²-O-galloylhyperin and chimaphilin. Single factor experiments and Box-Behnken design (BBD) were combined with a response surface methodology to examine factors affecting extraction. Maximum extraction yields of hyperin, 2â²-O-galloylhyperin and chimaphilin (1.339 ± 0.029, 4.831 ± 0.117 and 0.329 ± 0.011 mg/g, respectively) were achieved under the following optimised conditions: 700 W microwave power, 50 °C extraction temperature, 30:1 mL/g liquid-solid ratio, â0.05 MPa negative pressure, 55% ethanol concentration and 12 min extraction time. First-order kinetics equation demonstrated that NMAE offered significant savings in extraction time, and enhancing extraction efficiency. Furthermore, NMAE extracts yielded excellent antioxidant activity (IC50 0.121 mg/mL for DPPH 2.896 mmol FeSO4/g DW FRAP).
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Xiao-Hui Yao, Dong-Yang Zhang, Meng Luo, Shuang Jin, Yuan-Gang Zu, Thomas Efferth, Yu-Jie Fu,