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China Surfactant Detergent & Cosmetics ›› 2020, Vol. 50 ›› Issue (3): 164-170.doi: 10.3969/j.issn.1001-1803.2020.03.005

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Study on surfactant-assisted ultrasonic extraction of total polyphenols from Eucommia ulmoides leaves and their antioxidant activity

Lu-jun LI1,2,Zhi-hong WANG1,Yan-ping HUO2,Xiang WANG1,Qiu-ling YANG1,Mi-jun PENG1()   

  1. 1. Guangdong Provincial Public Laboratory of Analysis and Testing Technology, Guangdong Institute of Analysis, Guangzhou, Guangdong 510070, China
    2. School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou, Guangdong 510006, China
  • Received:2019-08-02 Revised:2020-03-06 Online:2020-03-22 Published:2020-04-02
  • Contact: Mi-jun PENG E-mail:pengmj163@163.com

Abstract:

The surfactant-assisted ultrasonic extraction of total polyphenols from Eucommia ulmoides leaves was optimized. The antioxidant activity in vitro was compared between the extracts from Eucommia ulmoides leaves with different extraction processes. Firstly, on the basis of the single-factor test, the total polyphenols were used as indicators to optimize the extraction conditions by the orthogonal experiment. Then the antioxidant activity of the extract from Eucommia ulmoides leaves was evaluated in vitro in terms of the hydroxyl radical scavenging rate, ABTS free radical scavenging rate, DPPH free radical scavenging rate and reducing power. The experimental results showed that the optimal extraction process was SDS dosage of 0.1 g/L, ultrasonic extraction time of 5 min, ethanol volume fraction of 50%, solid-liquid ratio of 1∶20 (g∶mL), and temperature of 45 °C. Under this condition, the total polyphenol yield of Eucommia ulmoides leaves was 6.770%. The extract from Eucommia ulmoides leaves had certain antioxidant activity in vitro.

Key words: Eucommia ulmoides leaf, total polyphenols, extraction process, surfactant, antioxidation

CLC Number: 

  • TQ658