Optimization of Radio Frequency Vacuum Process Parameters of Peony Bark based on Response Surface Methodology
Drying temperature(40,45,50 ℃),plate spacing(80,90,100 mm),vacuum degree(0.015,0.025,0.035 MPa)were used as test factors,color difference value,polysaccharide and total flavone content were used as evaluation indexes,and response surface optimization method was used to explore the effects of various factors on RF vacuum drying process.The results showed that the quadratic polynomial regression model was established with a high degree of fitting and could describe the radiofrequency vacuum drying process of Peony bark well.The order of influence degree of each factor on each index was as follows:Drying temperature＞plate spacing＞vacuum degree,the optimum process parameters were obtained as drying temperature 47.2 ℃,plate spacing 88 mm,vacuum degree 0.027 MPa.Under these conditions,the corresponding total color difference,polysaccharide and total flavonoids con-tents were 9.281,59.67 mg/g and 3.97 mg/g,respectively.This study can provide theoretical reference for postnatal processing of Peony bark.
万方数据
维普
