星点设计-效应面法优选远志的提取工艺

目的:星点设计-效应面法优选远志的提取工艺。方法:以乙醇浓度,回流时间和溶剂(倍)量为自变量,远志皂苷元提取率为因变量对自变量各水平进行多元线性回归和二项式拟合,用效应面法选择较佳工艺条件,并进行预测分析。结果:确定最优提取工艺为乙醇浓度60%,提取时间2.5 h,溶媒用量10倍,提取2次,提取率预测值与理论值偏差为-5.93%,二项式拟合复相关系r=0.979 0。结论:星点设计-效应面法优选远志的提取工艺,方法简便,预测性良好。

Optimal extraction of effective constituents from Radix Polygalae based on central composite design/response surface methodology

AIM: To optimize the process of extracting effective constituents from Radix Polygalae by central composite design/response surface methodology. METHODS: Independent variables were ethanol concentration,reflux time and solvent fold,dependent variable was extraction rate of senegenin in Radix Polygalae.Linear or nolinear mathematic models were used to estimate the relationship between independent and dependent variables.Response surface methodology was used to optimize the process of extraction.Prediction was carried out through comparing the observed and predicted values. RESULTS: Regression coefficients of binomial fitting complex model was as high as 0.979 0, the optimum conditions of extraction process were 60% ethanol,2.5 hours for reflux,10-fold solvent and 2 times for extraction.Bias between observed and predicted values was-5.93%. CONCLUSION: It shows that the optimum model is highly predictive.