共查询到17条相似文献,搜索用时 656 毫秒
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研究了微波辅助提取松针中莽草酸的提取工艺,考察了微波温度、料液比、微波功率、乙醇浓度和微波时间等因素对莽草酸提取率的影响,通过正交试验优化了提取工艺。结果表明,松针中莽草酸提取的最佳工艺条件为:微波温度35℃,料液比1∶20(g/mL),微波功率550W,乙醇浓度35%,微波时间90s,在此条件下,莽草酸的提取率可达11.312mg/g。 相似文献
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白花蛇舌草中总黄酮微波辅助提取工艺研究 总被引:1,自引:0,他引:1
研究了白花蛇舌草中总黄酮的微波辅助提取工艺,在单因素实验基础上,采用正交实验对提取工艺进行了优化。确定出最佳提取条件为:液料比20∶1mL/g、φ(乙醇)=80%、微波时间120s、微波功率400W、微波温度70℃,在此条件下,总黄酮的提取率达3.46%。 相似文献
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研究了乙醇回流法提取银杏叶总黄酮的工艺条件。通过单因素实验考察料液比、乙醇体积分数、提取时间、提取温度对银杏叶总黄酮提取率的影响,通过正交实验确定优化的提取工艺条件为:料液比1∶45(g∶mL)、乙醇体积分数50%、提取时间2.0h、提取温度70℃,在此条件下,银杏叶总黄酮提取率为0.918%。以优化的工艺条件为基础进一步运用微波辅助提取银杏叶总黄酮,发现在微波功率为640W时,采用间歇式提取,提取时间为15×10s,总黄酮提取率达到0.91%,接近传统方法提取3h的提取率。 相似文献
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金银花中绿原酸的微波辅助提取工艺研究 总被引:1,自引:0,他引:1
采用微波辅助法提取金银花中的绿原酸,研究了乙醇体积分数、料液比、微波功率和微波处理时间对绿原酸提取率的影响.通过单因素实验和正交实验确定最佳提取工艺为:乙醇体积分数60%、料液比1∶ 10(g∶ mL)、微波功率300 W、微波处理时间9 min,在此条件下,绿原酸提取率达3.779%. 相似文献
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阿魏中阿魏酸的提取方法及抑菌作用研究 总被引:1,自引:0,他引:1
研究阿魏中阿魏酸的提取工艺及其抑菌作用。用L9(34)正交试验超声波和微波辅助乙醇提取阿魏酸;用平板打孔法和试管稀释法研究不同质量浓度阿魏酸提取物对3种供试菌的抑菌作用。超声提取的最佳工艺条件是料液比1∶30(g/mL)、超声功率200 W、超声温度50℃和超声时间20 min;在此条件下,提取率达到0.542 mg/g。微波提取的最佳工艺条件是以80%的乙醇为提取溶剂、料液比1∶30(g/mL)、微波功率450 W和微波时间10 min,提取率可达0.556 mg/g。抑菌试验显示优选的微波提取的阿魏酸提取物对大肠杆菌、枯草芽孢杆菌和金黄色葡萄球菌都具有抑制作用。实验结果可为阿魏中阿魏酸提取工艺的确定及在抑菌方面的应用提供实验依据。 相似文献
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Xia EQ Wang BW Xu XR Zhu L Song Y Li HB 《International journal of molecular sciences》2011,12(8):5319-5329
Oleanolic acid and ursolic acid are the main active components in fruit of Ligustrum lucidum Ait, and possess anticancer, antimutagenic, anti-inflammatory, antioxidative and antiprotozoal activities. In this study, microwave-assisted extraction of oleanolic acid and ursolic acid from Ligustrum lucidum was investigated with HPLC-photodiode array detection. Effects of several experimental parameters, such as type and concentration of extraction solvent, ratio of liquid to material, microwave power, extraction temperature and microwave time, on the extraction efficiencies of oleanolic acid and ursolic acid from Ligustrum lucidum were evaluated. The influence of experimental parameters on the extraction efficiency of ursolic acid was more significant than that of oleanolic acid (p < 0.05). The optimal extraction conditions were 80% ethanol aqueous solution, the ratio of material to liquid was 1:15, and extraction for 30 min at 70 °C under microwave irradiation of 500 W. Under optimal conditions, the yields of oleanolic acid and ursolic acid were 4.4 ± 0.20 mg/g and 5.8 ± 0.15 mg/g, respectively. The results obtained are helpful for the full utilization of Ligustrum lucidum, which also indicated that microwave-assisted extraction is a very useful method for extraction of oleanolic acid and ursolic acid from plant materials. 相似文献
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以苦瓜果实为原料,以总黄酮提取率为评价指标,通过单因素实验考察了微波功率、液固比、乙醇体积分数、苦瓜粉末粒度等对总黄酮提取率的影响;在此基础上,通过正交实验确定最佳提取工艺条件为:微波功率500 W、液固比11∶1(mL ∶ g)、乙醇体积分数60%、苦瓜粉末粒度80目,在此条件下总黄酮提取率为15.576 mg·g-1. 相似文献
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