Optimization of spray drying technology of Liqi Huoxue Compound extract by Box-Behnken response surface method combined with G1-entropy weight method / 中草药

ABSTRACT

Objective: To optimize the spray drying process of Liqi Huoxue Compound (LHC) extract and evaluate the quality of extract powder. Methods: The drug concentration, inlet air temperature and air flow were used as independent variables, and the comprehensive scores of ferulic acid, tanshinone IIA, salvianolic acid B, puerarin content and flour extraction rate were used as the response values, and the test data were binomial fitting. The mathematical relationship between the comprehensive scoring index and their respective variables was established, and Box-Behnken design-response surface method combined with G1-entropy weight method was used to optimize the spray drying process of LHC extract. Results: The optimal spray drying process was a specific solution gravity of 1.08, inlet air temperature of 140 ℃, and an air flow of 40 m3/h. Under such conditions, the average content of ferulic acid, tanshinone IIA, salvianolic acid B and puerarin by the spray drying was 0.300 4 mg/g, 0.338 0 mg/g, 18.526 0 mg/g and 7.508 8 mg/g, respectively. The flour yield was 81.49%, the overall score was 94.69, and the RSD value was 0.99%. Conclusion: The preferred spray drying process of LHC extract is stable and feasible.