FOOD SCIENCE ›› 2008, Vol. 29 ›› Issue (9): 215-217.

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Optimization of Microwave-assisted Extraction Technique of Flavonoids from Scutellaria radix

 LIANG  Ying, REN  Cheng-Cai, HAN  Lu-Jia   

  1. 1. College of Arts and Science,Heilongjiang August First Land Reclamation University,Daqing 163319,China; 2. Key Laboratory of Modern Precision Agriculture System Integration,Ministry of Education,China Agricultural University,Beijing 100083,China
  • Online:2008-09-15 Published:2011-12-08

Abstract:  Objective: Airtight digestion/extraction system was adopted to carry out optimization of microwave-assisted extraction technique of flavonoids from Scutellaria radix. Methods: The microwave-assisted extraction (MAE) conditions were optimized with 4-factor quadratic orthogonal regression tests and the regression equations concerning ethanol concentration, temperature, time and liquid-solid ratio were educed. Results: The optimal technologic parameters are: ethanol concentration 47.9%, extraction time 3.4 min, extraction temperature 88.3℃, liquid-solid ratio 25.0 ml/g, and the highest the extraction rate of flavonoids is 97.52%. Conclusions: Microanalytical technique was used in studying effects on plant cell wall by microwave, and it was found that microwave has biological effects on plant samples. MAE has characteristics of high efficiency and selectivity, good repetition and saving time, and it is appropriate for extracting flavonoids from Scutellaria radix.

Key words: microwave-assisted extraction, Scutellaria radix, flavoniods, optimization