Optimization of quercitrin and total flavonoids extraction from Herba Polygoni Capitati by response surface methodology

Pharmacogn Mag. 2014 Jan;10(Suppl 1):S57-64. doi: 10.4103/0973-1296.127343.

Abstract

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.

Keywords: Central composite design; Extraction; Herba Polygoni Capitati; Optimization; Response surface methodology.