Objective: To optimize the process of extracting total flavonoids from Tagetes erecta.
Methods: The influential factors were extraction temperature, ethanol concentration, reflux time and solvent volume fold. The evaluating indicator was the extraction rate of total flavonoids from Tagetes erecta. The central composite design-response surface methodology was used to optimize the process and the prediction was carried out.
Results: The optimum conditions of extraction were 80% ethanol, 2.5 hours for reflux, 35 volume folds of solvent and 70 degrees C.
Conclusion: It shows that the optimum model is simple and highly predictive.
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