頁籤選單縮合
題名 | Supercritical Fluid Extraction of Flavonoids from Scutellariae Radix= |
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作者 | Lin,Mei-chih; Tsai,Ming-jer; Wen,Kuo-ching; |
期刊 | 藥物食品檢驗局調查研究年報 |
出版日期 | 19991000 |
卷期 | 17 1999.10[民88.10] |
頁次 | 頁214-222 |
分類號 | 413.95 |
語文 | eng |
關鍵詞 | Scutellaria baicalensis; Extraction methods; Flavonoids; Baicalin; Baicalein; Wogonin; |
英文摘要 | An optimal condition of supercritical fluid extraction (SFE) for flavonoids of Scutellaria baicalensis was developed. In this study, various temperatures, pressures and modifiers were studied. The conventional extraction methods were conducted in parallel for comparison. The crude extracts were qualitatively compared by TLC and GC-MS, and the contents of flavonoids were determined by HPLC. The amounts of baicalin, baicalein and wogonin in the Scutellariae Radix obtained by supercritical fluid extraction and a conventional sonic shaking method were 137.6 mg/g, 8.6 mg/g and 2.2 mg/g, 113.5 mg/g, 5.7 mg/g and 2.3 mg/g. respectively. Application of SFE for extraction of the flavonoids from Scutellariae Radix was preferable. The optimal conditions of SFE was as follows: supercritical carbon dioxide-MeOH-water (20:2.1:0.9), 50 ℃ and 200 bar. �U 1999 Elsevier Science B.V. All rights reserved. |
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