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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/28699


    標題: Simultaneous Extraction and Quantitation of Oleanolic Acid and Ursolic Acid from Scutellaria barbata D. Don by Ultrasound-Assisted Extraction and High-Performance Liquid Chromatography
    作者: Yang, Yu-Chiao
    Wei, Ming-Chi
    Lian, Fan-Yu
    Huang, Ting-Chia
    貢獻者: 環境工程與科學系
    藥物科技研究所
    關鍵字: Heat-reflux extraction
    High-performance liquid chromatography
    Oleanolic acid
    Scutellaria barbata D
    Don
    Ultrasound-assisted extraction
    Ursolic acid
    日期: 2014-04
    上傳時間: 2015-05-06 21:25:38 (UTC+8)
    出版者: Taylor & Francis Inc
    摘要: A modified ultrasound-assisted extraction (MUAE) method and an HPLC technique were developed to identify and quantify simultaneously the amount of oleanolic acid (OA) and ursolic acid (UA) in Scutellaria barbata D. Don. The optimal conditions for MUAE were observed when the particle size was 0.2-0.5mm, the duty cycle was 75%, the extraction temperature was 55 degrees C, the ratio of solvent to raw material was 12.0:1 (mL:g), the ethanol concentration was 60%, and the extraction time was 25min. Compared to the traditional extraction method, MUAE reduced the extraction time, extraction temperature, and solvent consumption and achieved superior yields of OA and UA. Furthermore, the combined MUAE-HPLC method was successfully applied for the first time to investigate and compare the amounts of OA and UA in samples obtained from different geographical regions.
    關聯: Chemical Engineering Communications, v.201 n.4, pp.482-500
    Appears in Collections:[藥學系(所)] 期刊論文
    [環境工程與科學系(所)] 期刊論文

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