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| Optimization of ultrasound-assisted extraction of polyphenols from lotus rhizome node and its antioxidation ability on oils and fats |
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| DOI：10.12166/j.zgyz.1003-7969/2020.04.011 |
| KeyWord:lotus rhizome node polyphenols ultrasound Box-Behnken design anti oxidation ability on oils and fats |
| FundProject:国家自然科学基金项目(51809228)；中医药公共卫生服务补助专项“全国中药资源普查项目”(财社\[2018\]43号) |
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| Abstract: |
| The yield of polyphenols was used as an index, and the ultrasonic time, ultrasonic temeprature, ratio of solid to liquid and volume fraction of ethanol were used as the influence factors, the single factor experiment and Box-Behnken (BBD) design were employed to optimize the extraction process of polyphenols from lotus rhizome node. In addition, the antioxidation ability on oils and fats of polyphenols obtained was studied by thermostat storage method. The results showed that the optimal extraction conditions were obtained as follows: ultrasonic time 34 min, ultrasonic temperature 50 ℃, ratio of solid to liquid 1∶ 20, volume fraction of ethanol 70%. Under the optimal conditions, the yield of polyphenols was (7.11±014)%. The polyphenols from lotus rhizome node could significantly slow down the increasing trend of peroxide value in oil and it had obvious inhibitory effect on the auto-oxidation of animal and vegetable oils, and the effect was kind of concentration-dependent. |
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