【摘要】 以无花果为试验原料,采用响应面分析法(Response Surface Methodology,RSM)建立超临界CO2提取无花果多糖(FPS)得率的二次多项数学模型,验证数学模型的有效性,并探讨萃取温度(70~90℃)、压力(30~40MPa)和时间(80~100 min)三因素对FPS得率的影响。根据该模型优化工艺参数。以FPS得率为指标,试验所得超临界CO2萃取最佳工艺条件:温度78.5℃,压力33.4 MPa,时间96.2 min。在该条件下做3次重复试验,FPS的实际平均得率高达17.31%,与预测值17.36%无显著差异。更多还原

【Abstract】 Response surface methodology(RSM) was employed to optimize the process parameters of supercritical carbon dioxide(SC-CO2) extraction of the fig polysaccharide(FPS).The adequacy of the model equation for predicting the optimum response values was verified effectively by the validation.Effects of temperature(70~90 ℃),pressure(30~40 MPa)and time(80~100 min) on yield of FPS were investigated.The optimum parameters within the experimental ranges were determined to be at 78.5 ℃,33.4 MPa and with 96.2 min.Under these conditions,the average value of the actual yield of the FPS in three replicated experiments is 17.31%,and this value is not significantly different from the value of 17.36% predicted by the model.更多还原