FOOD SCIENCE ›› 2011, Vol. 32 ›› Issue (16): 71-75.doi: 10.7506/spkx1002-6630-201116015

• Processing Technology • Previous Articles     Next Articles

Ultrasonic-assisted Ethanol Extraction and Antioxidant Activity of Total Flavonoids from Equisetum ramosissimum Desf. Grown in West Hunan

ZHANG Jun-sheng,CHEN Li-hua*,ZHANG Wen-long   

  1. (College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, China)
  • Online:2011-08-25 Published:2011-07-26

Abstract: One-factor-at-a-time and orthogonal array design methods were used to optimize the conditions for ultrasonic-assisted ethanol extraction of total flavonoids from the dried shoot of Equisetum ramosissimum Desf. grown in west Hunan province, China. The extraction yield of total flavonoids was 1.16% under the optimal extraction conditions: 45% ethanol aqueous solution as the extraction solvent, material-to-liquid ratio 1:30 (g/mL), ultrasonic treatment time 30 min, and extraction temperature 60 ℃. The total flavonoids could scavenge hydroxyl free radicals in a concentration-dependent fashion and had stronger inhibitory effect against lipid peroxidation in tea seed oil than in lard.

Key words: Equisetum ramosissimum Desf., total flavonoids, extraction, fat and oil, antioxidation

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