共查询到19条相似文献,搜索用时 468 毫秒
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采用超声波辅助法从黑米粉末中提取黑米色素.通过单因素实验考查了提取温度、提取时间、料液比、超声波功率对色素提取率的影响.在单因素试验基础上,结合正交试验优化提取工艺.实验数据分析得出:提取温度为35℃,提取时间为35 min,料液比为1:6 g/mL,超声波功率为70 W时,黑米色素的提取率最高. 相似文献
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基于紫杉醇的抗癌功效,探究何种条件(乙醇浓度,固液比,提取时间,提取次数,提取功率,温度,颗粒直径,溶媒,提取方法,提取部位)下,能在有限的红豆杉中最大量的提取紫杉醇很有必要。在单因素条件的基础上,选取预处理中影响紫杉醇提取的4个因素(固液比,提取时间,超声波功率,温度)进行4因素3水平(L9(34))正交实验。然后对K值进行分析,得出结论:最优的超声波预处理实验组合为温度50℃、固液比为1:35、超声波提取时间为40 min、超声波功率为70%。最后采取氧化铝柱层析进一步除杂,通过高效液相色谱结果,对提取纯化的效果进行分析。 相似文献
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采用单因子试验和L9(34)正交试验设计,比较了热水浸提、超声波辅助热水浸提中料液比、提取时间、提取温度、盐浓度和超声波功率对蒲公英糖蛋白提取率的影响。热水浸提蒲公英糖蛋白的最佳工艺参数为:料液比1∶25、温度80℃,浸提时间3 h、盐浓度0.1 mol/L。超声波辅助提取的最佳工艺参数为:料液比1∶15、功率120 W、时间15 min、盐浓度0.1 mol/L。两种方法相比,超声波辅助法所需时间更短,但糖蛋白提取率较热水浸提低,在实际应用时需要综合考虑。 相似文献
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《分离科学与技术》2012,47(5):673-681
Artemisinin is a compound extracted from Artemisia annua L. with a remarkable curative effect against malaria. It can be extracted using ultrasound-assisted extraction (UAE) and then detected via HPLC. In this study, response surface methodology (RSM) was used to optimize UAE conditions for obtaining the maximum yield of artemisinin. Three independent variables (ratio of solvent to material, extraction temperature, and ultrasonic power) were evaluated using the Box-Behnken experimental design, with the yield of artemisinin as a response variable. Experimental data were highly fitted to a mathematical-regression model using multiple linear regression (MLR). Based on response surface plots, the three independent variables exhibited interactive effects on the yield of artemisinin. The optimal extraction conditions were as follows: 42.71 mL/g ratio of solvent to material, 41.86°C extraction temperature and 120 W ultrasonic power. The predicted yield of artemisinin by model was 0.7848%, whereas the actual yield in the extracts was 0.7826% ± 0.0790% in adjusted optimal conditions, with a relative error of 0.28%. The results undoubtedly demonstrated that RSM could be used to explore the optimum conditions of artemisinin extraction. 相似文献
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气升式反应器超声破碎海带提取硫酸酯多糖 总被引:10,自引:0,他引:10
在内径8cm、有效容积为1L的气升式循环超声破碎浸提装置中,进行了超声波强化海带硫酸酯的多浸提实验。在pH5.0、提取温度40℃、液固比45、提取时间25min、通气量75L/h、超声功率120W、超怕作用时间百分比为100%的工艺条件下,硫酸酯多糖的提取率可达1.86%,比传统水提法高,且大地缩短了提取时间,比相同条件下不用超声时的提取率(1.11%)高得多。此法所得多糖的SO4^2-含量(26.5%)比水法浸提(20.8%)和相同条件下不用超声时(21.3%)都要高,显示出超声波在强化海带硫酸酯多糖浸提方面的良好应用前景。 相似文献
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