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目的:考察乙醇作为夹带剂对超临界CO2萃取云厚朴总酚的影响,优选云厚朴最佳提取工艺。方法:在不加夹带剂的工艺条件基础上,以不同乙醇浓度、乙醇用量及CO2流速作为考察因素,并用紫外分光光度法进行含量测定。结果:经紫外分析测定,在85%乙醇、用量600mL、CO2流速为20L/h的条件下,厚朴总酚提取率最高,平均为7.01%。结论:SFE-CO2萃取云厚朴中厚朴总酚的最优工艺为在添加夹带剂的情况下:萃取温度45℃,萃取压力30MPa,分离温度为35℃,分离压力7MPa,85%乙醇,600mL的用量,CO2的流量为20L/h,萃取时间为2.5小时。
Objective: To investigate the effect of ethanol as an entrainer on the extraction of total phenolics from Magnolia officinalis with supercritical CO2, and to optimize the extraction process of Magnolia officinalis. Methods: On the basis of the process conditions without entrainer, different concentrations of ethanol, ethanol and CO2 flow rate were used as the investigation factors, and the content was determined by UV spectrophotometry. RESULTS: After UV analysis, the extraction rate of total phenol was the highest, with an average of 7.01% under the conditions of 85% ethanol, 600 mL, and CO2 flow rate of 20 L/h. Conclusion: The optimum process of extracting total phenolics from S. officinalis with SFE-CO2 is under the condition of adding entrainer: extraction temperature 45°C, extraction pressure 30MPa, separation temperature 35°C, separation pressure 7MPa, 85% ethanol, 600mL Dosage, CO2 flow rate is 20L/h, extraction time is 2.5 hours.