[Optimize extraction technology of Fufang Bajitian Shenggu Particles by central composite design and response surface method].

Objective: To optimize extraction process of Fufang Bajitian Shenggu Particles by central composite design and response surface method.

Methods: The preparation of Fufang Bajitian Shenggu Particles was designed according to the test. With the overall desirability (OD) of Icariin content and the dry extract yield in medicinal materials extract concentrate as examining indexes, immersion time, material liquid ratio, extraction time and stress concentration temperature were investigated. Based on the single factor tests, material liquid ratio, extraction time and stress concentration temperature which impacted response values significantly were investigated by three factors and five levels of central composite design.

Results: Optimum extraction technology of Fufang Bajitian Shenggu Particles were as follows: material liquid ratio was 1:11.33, extraction time was 39 min, and stress concentration temperature was 66 °C. Bias of the lcariin content and the dry extract yield between observed and predicted values were 1.60% and 1.55% ,respectively.

Conclusions: Using central composite design and response surface method to optimize extraction of Fufang Bajitian Shenggu particles has a good prediction.