Medicinal Plant

2015, v.6(Z1) 47-49

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Optimization of the Extraction Technology of Tannins from Geranium orientalitibeticum R. Knuth by Supercritical CO_2 Extraction
Optimization of the Extraction Technology of Tannins from Geranium orientalitibeticum R. Knuth by Supercritical CO_2 Extraction

Song XIE;Zhiping TONG;Rui TAN;Xiaozhen LIU;

摘要(Abstract):

[Objective] To establish the optimal extraction technology of tannins from Geranium orientalitibeticum R. Knuth,and to provide references for its large-scale production. [Methods]The extraction technology of tannins from G. orientalitibeticum was optimized by supercritical CO2 extraction. Tannins content was detected by tungsten molybdophosphate-casein colorimetric method. Extraction pressure,temperature and time were taken as the research factors. With the tannins content in G. orientalitibeticum extracts as the evaluation index,extraction technology was optimized by orthogonal test. [Results]The optimal extraction technology was 25 MPa extraction pressure,50 ℃ extraction temperature and 1. 5 h extraction time. The mass fraction was 12. 91 mg / g and the extraction rate was 3. 67%. [Conclusions]This method could be used for the content detection of tannins in G. orientalitibeticum. The optimized technology was stable and feasible and had high extraction rate,which provided theoretical foundation for the design of extraction technology of tannins in G. orientalitibeticum.

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作者(Author): Song XIE;Zhiping TONG;Rui TAN;Xiaozhen LIU;

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