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Chemistry and Industry of Forest Products ›› 2023, Vol. 43 ›› Issue (4): 60-66.doi: 10.3969/j.issn.0253-2417.2023.04.009

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Optimization of Extraction Process of Flavone C-glycosides from Bamboo Leaves by Deep Eutectic Solvent-Ball Mill Method

Yaqian LIU, Jin WANG(), Feng TANG   

  1. International Centre for Bamboo and Rattan; Key Laboratory of National Forestry and Grassland Administration/Beijing for Bamboo & Rattan Science and Technology, Beijing 100102, China
  • Received:2022-04-22 Online:2023-08-28 Published:2023-08-26
  • Contact: Jin WANG E-mail:wangjin@icbr.ac.cn

Abstract:

Ball mill method was used to extract flavone C-glycosides from bamboo leaves using deep eutectic solvents(DESs) as extraction solvent. The contents of four flavone C-glycosides(isoorientin, orientin, isovitexin and vitexin) in bamboo leaves were determined by liquid chromatography quadrupole time-of-flight mass spectrometry(LC-Q-TOF-MS). By single factor experiments and orthogonal design, the parameters including water content, extraction time and liquid-solid ratio of DESs were investigated. The results showed that the optimized extraction process of flavone C-glycosides from bamboo leaves was as follows: DESs(composed of choline chloride and ethylene glycol) water content of 50%, extraction time of 150 s, and liquid-solid ratio of 6∶1(mL∶g). Under these conditions, the total extraction yield of four flavone C-glycosides from bamboo leaves was 1.55 mg/g, including isoorientin of 0.99 mg/g, orientin of 0.23 mg/g, vitexin of 0.04 mg/g and isovitexin of 0.29 mg/g. The extraction yield of this method was 7.6% higher than that of immersion extraction, and the time and organic solvent were saved. This optimized technology combined with LC-Q-TOF-MS detection was successfully applied to the extraction and determination of flavone C-glycosides in bamboo tea samples made from bamboo leaves.

Key words: flavone C-glycosides, ball mill, deep eutectic solvents, extraction, bamboo leaves

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