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超声提取植物有效成分的动力学研究 总被引:6,自引:0,他引:6
超声波对植物粉末中提取有效成分过程的作用进行了实验研究,并以大豆粉末为原料,以70%乙醇水溶液为溶剂进行了循环超声提取大豆异黄酮的实验。以实验测得的大豆异黄酮提取率随提取时间变化的数据,按照无扩散阻力的缩核模型和有效成分扩散控制模型分别进行了数据处理。结果表明,无扩散阻力的缩核模型能较好地描述植物粉末有效成分的超声提取过程,其控制步骤主要是颗粒中核一壳界面层细胞破碎过程。 相似文献
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采用表面活性剂辅助-微波法提取金盏花的叶黄素。研究了表面活性剂种类及浓度、微波提取时间、温度、料液比对叶黄素提取率的影响。利用单因素法和响应曲面分析法研究表面活性剂辅助-微波法提取金盏花叶黄素的最佳条件为:浓度42mg·mL~(-1)的月桂酰肌氨酸钠(OLI-4208),料液比为1︰20 mg/mL,微波提取温度68℃,微波提取时间5 min,金盏花叶黄素的提取率可达70.35%。 相似文献
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类胡萝卜素是烟草中重要的香气前体化合物,是评价烟叶调制好坏的重要指标。论文利用超声萃取-超高效液相色谱技术,建立了快速、稳定的分析方法测定烟草中的类胡萝卜素。论文建立的方法可有效防止类胡萝卜素氧化,优化其提取效率,在0.8~32.0μg/mL叶黄素和0.48~19.2μg/mLβ-胡萝卜素浓度范围内具有良好线性度和较大色谱峰响应;叶黄素和β-胡萝卜素的加标回收率分别为98.7%和87.0%;叶黄素和β-胡萝卜素精密度分别为3.9%、3.7%。方法的准确性和可操作性可满足日常大批量烤烟种类胡萝卜素的快速检测要求。 相似文献
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微波-表面活性剂协同提取万寿菊叶黄素工艺研究 总被引:4,自引:0,他引:4
以提高万寿菊叶黄素的提取率为目的,采用单因数实验结合正交实验的方法.研究了微波-表面活性剂协同提取万寿菊花中叶黄素的丁艺.结果表明:万寿菊叶黄素的微波-表面活性剂协同提取最优工艺为:以乙酸乙酯为提取剂,表面活性剂Tween-20为最佳助萃取剂(质量分数为0.03%),提取固液比1∶60(g/mL),微波功率400 W,微波提取温度为60℃,提取时间2 min.在此工艺下,万寿菊叶黄素的提取量为3.209 mg/g. 相似文献
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This paper established a viable process for the simultaneous reaction, extraction, and primary purification of lutein in marigold flower by the isopropanol–KOH aqueous two-phase system (ATPS). In this process, the liposoluble lutein esters were translated into water-soluble lutein by saponification reaction in ATPS and distributed to the top phase. Meanwhile, the water-soluble flavonoids in marigold were also extracted and distributed to the bottom phase. The concentrations of phase-forming isopropanol and KOH, the added mass of marigold flower powder, temperature, and time were investigated to evaluate their effects on the extraction and partition behaviour of lutein and flavoniods in ATPS. Under the optimal conditions (38% isopropanol, 18% KOH, 0.05 g of marigold flower powder, 500°C and 1.5 h extraction time), the leaching efficiency, extraction efficiency, and partition coefficient of lutein were 84.64%, 86.73%, and 5.115, respectively, and at this point, the saponification rate of lutein reached 93.98%. Meanwhile, the leaching efficiency, extraction efficiency, and partition coefficient of flavoniods were 96.68%, 78.31%, and 0.2167, respectively. This method shows the superiority to the conventional one for it can not only efficiently extract lutein in marigold flower, but also achieve a high saponification rate of lutein esters and simultaneously separate two major pigments. 相似文献
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微波-超声波协同萃取银杏黄酮的工艺研究 总被引:4,自引:0,他引:4
以银杏叶为材料,研究了乙醇浓度、微波功率、微波处理时间、料液比、银杏叶粉碎颗粒大小以及微波-超声波协同作用对银杏黄酮提取效率的影响。结果表明微波处理,微波-超声波协同处理可以显著提高银杏黄酮的提取率。确定了最佳的微波处理条件:70%乙醇为萃取液,料液比1∶20,粉末颗粒80目,微波功率50W,微波处理时间4 m in,处理后水浴回流提取2 h所得提取液的黄酮提取率达到81.76%,比直接水浴提取提高了1.3倍,微波-超声波协同处理的黄酮提取率达到83.54%。 相似文献
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Eleven carotenoid pigments were found in the bud, leaf, flower petal, seedling and seed of the cotton plant; nine were identified
and quantitated. The most abundant carotenoids in the green tissue of the cotton plant were β-carotene and lutein. Carotene
hydrocarbons comprised 12% of the total carotenoids in the seed, 15% in the 1-day-old flower petal, 51% in the bud and 57%
in green leaves. Only 5,8-epoxy carotenoids were found in the flower petals and only 5,6-epoxides in the other tissue but
both were present in the seed. The colorless phytoene precursors to the carotenoids comprised from 20% to 38% of the total
carotenoid pigment in the growing tissue of the plant.
In cooperation with the Mississippi Agricultural Experiment Station, State College. 相似文献
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采用超声辅助乙醇提取女贞子中黄酮类化合物,考察乙醇浓度、超声功率、超声时间和料液比对提取率的影响。结果表明,最佳提取条件为:乙醇体积分数为50%,料液比1∶70(g/mL),600 W功率下提取20 min,并通过实验确定在此条件下黄酮类化合物的提取率达到13.61%。 相似文献
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微波和超声波辅助提取穿心莲内酯 总被引:2,自引:1,他引:1
用正交法对微波和超声波辅助提取穿心莲内酯的工艺条件进行优化。微波辅助法提取穿心莲内酯的最佳工艺条件为温度40℃、提取溶剂为体积分数75%的乙醇、提取时间8 min;超声波辅助法提取穿心莲内酯的最佳工艺条件是提取溶剂为体积分数75%的乙醇,超声效率40%、超声时间50 min。微波提取法的平均回收率为99.9%,RSD为0.31%;超声波提取法的平均回收率为100.5%,RSD为0.21%。与超声波提取法相比,微波提取法提取时间较短,提取得率较高。 相似文献
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为获得最佳的荞麦粉黄酮超声提取工艺,在考察单因素的基础上,采用四因素三水平的正交试验,获得最佳的超声提取黄酮工艺条件为:乙醇浓度65%,料液比为1∶45,超声温度60℃,超声时间25 min。在最优工艺条件黄酮得率最高,为20.5 mg/g。 相似文献