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以荞麦花为原材料,采用超声辅助法对荞麦花黄酮进行了提取,并在单因素的基础上采用响应面法对提取工艺进行了优化,得到最佳工艺条件为:乙醇体积分数63%、料液比1∶21 g/mL、超声时间59 min。 相似文献
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利用响应面法对超声提取杜鹃花黄酮类成分的工艺条件进行优化。在对乙醇体积分数、料液比、提取时间单因子实验的基础上,根据中心组合设计原理,采用三因子三水平的响应面分析法,在分析各个因素的显著性和交互作用后,得出超声辅助提取杜鹃花黄酮的最优工艺条件:乙醇的体积分数为74.08%,料液比为20.58∶1,提取时间为32.48 min,此时黄酮平均提取率为8.758%。 相似文献
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The kinetics of leaching flavonoids from Pueraria Lobata with ethanol was investigated. The effects of leaching temperature, mechanical agitation rate, concentration of ethanol and feed particle size on leaching kinetics were examined. It is found that the smaller the feed particle size or the higher the leaching temperature, the higher the leaching rate. The leaching process can be described by the shrinking-core model. The apparent activation energy is 10.8kJ·mol^-1, suggesting that the leaching process is controlled by the inner diffusion. An empirical equation relating the flavonoids leaching rate constant to the feed particle size and leaching temperature was expected. 相似文献
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目的:优化藤梨根总黄酮超声提取工艺。方法:超声提取药材,利用分光光度计法于510 nm波长处测定总黄酮含量,运用Design-Expert 8.0.6 Trial软件建立以总黄酮提取率作响应值,液料比、乙醇体积分数和提取时间为三因素的Box-Behnken响应面并进行多元二次回归分析。结果:最佳提取工艺条件为液料比12.45,乙醇体积分数78.09%,提取时间39.66 min,总黄酮的提取率为7.49%,与预测值7.58%偏差1.19%。结论:该工艺稳定可行,可用于藤梨根中总黄酮的工业化生产。 相似文献
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以秸秆为原料,微波干燥后经炭化、活化处理制备出一种新型多孔材料。以响应面法对多孔材料的制备工艺进行优化,并用扫描电镜、N_2-物理吸附(BET)分析和X射线衍射(XRD)等分析手段对产物的结构和性质进行了表征。结果表明,该多孔材料的最佳制备条件为活化反应温度707.40℃、炭化样品与KOH质量比1:3、活化反应时间17.20 min,在此条件下制备的材料具有较好的多孔性和较大比表面积,孔径集中在5.6~13 nm,比表面积达1 463.15 m~2/g,是孔径较大的介孔材料。 相似文献
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《分离科学与技术》2012,47(7):1014-1022
Hot water extraction process was used for the extraction of steviosides from dry stevia leaves. The independent variables were, leaf to water ratio (1:5 to 1:20), heating time (10 to 120 min), and temperature (30 to 90°C). The combined effects of these independent variables on the extracted stevioside concentration and color of the extract were studied. For optimizing the extraction process, central composite rotatable design in combination with response surface methodology was used. Significant regression models with coefficient of determination greater than 0.90 were established to study the effect of independent variables on the responses. The optimum conditions are: temperature of water: 78°C, time of heating: 56 min and leaf to water ratio: 1:14 (g:mL). 相似文献
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利用响应面法优化龙葵中澳洲茄边碱的提取工艺。采用单因素实验结合Box-Behnken中心组合设计,以澳洲茄边碱提取率为指标,考察乙醇体积分数、提取时间、料液比等因素对提取效果的影响。确定龙葵中澳洲茄边碱的最优提取工艺为:乙醇体积分数80%、提取时间2.1h、料液比1∶12(g∶mL)、提取2次,在此条件下,澳洲茄边碱提取率为0.721mg·g-1,与理论值(0.712mg·g-1)相符,表明工艺可行,预测性较好。从龙葵中提取的澳洲茄边碱能明显抑制K562、HL-60、BGC-823、MCF-7、Hela等肿瘤细胞的增殖,具有较强的体外抗肿瘤活性。 相似文献
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采用均匀设计方法,用超声波提取葛根总黄酮,探讨最佳提取工艺条件,为生产提供理论依据。结果表明:最佳工艺条件为超声75min,超声波功率100w,粒度100~200目,40%乙醇,液料比20:1时,实际提取率为2.21%;采用超声波提取法具有提取时间短,设备简单,操作方便,适于葛根黄酮物质的提取;均匀设计在提取研究中是一种有效的实验设计方法 相似文献