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Optimization of quercitrin and total flavonoids extraction from Herba Polygoni Capitati by response surface
Fengwei Ma1, Yang Zhao1, Xiaojian Gong1
1The Research Center for Quality Control of Nature Medicine, Guizhou Nomal University, Guiyang, Guizhou, P.R. China ; Key Laboratory for Information System of Mountainous Area and Protection of Ecological Environment of Guizhou province, Guizhou Nomal University, Guiyang, Guizhou, P.R. China.
Objective:
To optimize the conditions for extraction of quercitrin and total flavonoids (TF) from Herba Polygoni Capitati (Touhualiao in Chinese) by using response surface methodology (RSM).
Materials And Methods:
A central composite design (CCD) was adopted to investigate the effects of three independent variables including solvent composition (%), solvent-material ratio (ml/g) and extraction time (min) on the responses, quercitrin and TF yields.
Results:
THE OPTIMIZED CONDITIONS OF THE EXTRACTION ARE AS FOLLOWS: Ethanol concentration, 65.63%; solvent-material ratio, 10.55:1 (ml/g); extraction time, 54.33 min. The established mathematical model described the factors of experimental parameters well and provided a statistically accurate prediction of the optimum yields of quercitrin and TF.
Conclusion:
The experimental values agreed with those predicted by the established mathematical model, thus indicating the suitability of the model employed and the success of RSM in optimizing the extraction conditions.
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Methods of Medium Optimization
Response Surface Methodology
The process of RSM involves several key steps: