共查询到19条相似文献,搜索用时 187 毫秒
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《分离科学与技术》2012,47(11):1657-1664
Statistical experimentical designs were applied to optimize microwave-assisted extraction of puerarin from Radix Puerariae. The most important factors affecting the extraction procedure were determined using a Plackett-Burman design. Results indicated that the concentration of ethanol, solvent-material ratio, extraction time, and microwave power were the main factors affecting the extraction yield. These factors were further optimized using a central composite design and response surface methodology. The optimal extraction parameters were ethanol concentration of 52.36%, microwave irradiation time of 60 s, microwave power of 184.8 W and solvent-material ratio of 25:1(mL/g). The average experimental puerarin yield under the optimum conditions was found to be 11.97 mg/g, which agreed with the predicted value of 11.8 mg/g. The proposed method shows high degree of reproducibility. 相似文献
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在林檎叶天然防腐保鲜成分微波辅助浸提工艺中通过均匀试验设计构建模型,运用Excel中回归分析工具得到回归方程。试验中所选因素对微波辅助提取的影响顺序为:微波功率>液料比>浸提次数>微波时间。确定林檎叶防腐保鲜成分提取最优工艺条件为:微波时间1min,微波功率700W,液料比61.62∶1,浸提次数3.51。对林檎叶防腐保鲜成分中的活性成分进行化学定性分析,其中含有黄酮类化合物、多元酚类及皂甙等活性物质。 相似文献
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Jiang‐Feng Song Da‐Jing Li Chun‐Quan Liu 《Journal of chemical technology and biotechnology (Oxford, Oxfordshire : 1986)》2009,84(11):1669-1673
BACKGROUND: Microwave‐assisted extraction was employed to extract polysaccharides from cultured Cordyceps militaris. The optimal conditions for polysaccharide extraction were determined by response surface methodology. Box–Behnken design was applied to evaluate the effects of three independent variables (microwave power, extraction time and ratio of solution to solid) on the polysaccharide yield of C. militaris. RESULTS: Correlation analysis of the mathematical‐regression model indicated that a quadratic polynomial model could be employed to optimize the microwave‐assisted extraction of polysaccharide. Response surface plots showed that microwave power, extraction time and ratio of solution to solid exhibited independent and interactive effects on the extraction of polysaccharide. The optimal conditions to obtain the highest polysaccharide yield of C. militaris were a microwave power of 744.8 W, an extraction time of 4.2 min and a ratio of solution to solid of 31.1 mL g?1. CONCLUSION: Under these optimal conditions, the experimental values agreed with the predicted values, using analysis of variance, indicating the goodness of fit of the model used and the success of response surface methodology for optimizing microwave‐assisted extraction of polysaccharide from C. militaris. Copyright © 2009 Society of Chemical Industry 相似文献
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绿春地区断肠草生物总碱提取工艺优化 总被引:1,自引:1,他引:0
优选微波法提取断肠草生物总碱的工艺,以断肠草生物总碱的提取率为指标,考察不同提取条件下的提取率。先通过单因素实验对断肠草生物总碱的提取工艺中溶剂种类、提取系统中固液比、浸提时间、浸提温度4个因素进行优选,进而考察多因素协同作用对生物总碱提取率的影响设计了L9(33)的正交实验。结果表明,采用氯仿作为提取溶剂、微波功率500W、固液比1∶8(g/L)、浸提时间240 s(80 s×3)、浸提温度55℃时生物总碱得率最高为1.63%,因此,以氯仿为提取溶剂,经微波辅助技术处理后生物总碱提取量显著得到了提高。 相似文献