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川佛手中黄酮类物质的微波和超声波联合提取工艺优化 总被引:1,自引:0,他引:1
《应用化工》2017,(11):2154-2157
采用微波和超声波联合提取技术提取川佛手中的黄酮,在微波功率800 W和微波提取时间40 min条件下,考察了乙醇浓度、提取温度、超声时间和料液比对提取效率的影响。结果表明,超声波提取川佛手中黄酮类物质的最佳工艺参数为:乙醇浓度80%,温度55℃,提取时间1.5 h,料液比1∶20 g/mL。在最佳提取工艺条件下,川佛手黄酮的提取率约为44.05 mg/g。 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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通过正交试验优化了马占相思树皮中原花色素的3种提取方法的最佳提取工艺条件。结果显示,传统溶剂提取法的最佳工艺为:60%乙醇、70℃、70 min、料液比1∶18(g∶mL,下同),原花色素得率为7.42%;微波辅助提取法的最佳工艺条件为:60%乙醇、微波功率200 W、微波时间8 min、料液比1∶18,得率为7.05%;超声波辅助提取法的最佳工艺为:70%乙醇、超声波温度50℃、超声波时间50 min、料液比为1∶16,得率为8.57%。超声波辅助提取法效果最好,浸提温度低,得率高。进一步对超声波提取物不同溶剂萃取物的体外抗氧化活性和抗肿瘤活性进行了研究。结果表明,乙酸乙酯萃取物对DPPH·清除效果最好,其半数抑制浓度(IC50)为17.94 mg/L,低于对照样维生素C(Vc)的IC50值;乙酸乙酯萃取物对人肝癌细胞Bel-7404具有明显的抑制效果,IC50值为4.86 mg/L,与抗肿瘤药依托泊苷效果相当。 相似文献
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用微波辅助甲醇提取洋葱籽中的皂苷类成分,考察甲醇浓度、微波时间、微波功率、料液比对皂苷类成分得率的影响。结果表明,最佳提取工艺条件为:甲醇浓度100%,料液比1∶25 g/m L,微波功率400 W,微波时间25 min,总皂苷提取率为6.87%。 相似文献
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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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采用微波辐射技术,以乙醇提取苹果渣中黄酮类化合物。考察了乙醇浓度、微波功率、处理时间、料液比和浸泡时间对总黄酮提取率的影响。结果表明,最佳工艺条件为:70%乙醇,微波萃取2 min,微波功率为350 W,料液比1∶30(g/mL),总黄酮1次提取率0.683 7%。 相似文献
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A mathematical model has been developed to simulate and predict the dynamic behavior of liquid extraction counter current operations in mixer-settler units. Murphree efficiency has been included in the model. The behavior of a multistage glass mixer-settler has been studied under start-up transient conditions. Very good agreement between the simulation results and the experimental findings have been obtained. The simulation results showed that this model can efficiently be used to determine the optimum number of stages, the capacity of each stage, the phase ratio and the time required for each unit to attain steady state conditions. Other controlling parameters in operating such units are investigated. 相似文献
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M. H. I. Baird 《加拿大化工杂志》1991,69(6):1287-1301
The solvent extraction area is perceived by some chemical engineers as being mature and fully developed. The present review shows that this is not the case. Many chemical engineering problems must be solved before equipment can be confidently designed from first principles. The review also outlines progress in extraction process chemistry, and in new techniques such as membrane extraction. 相似文献
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张文兵 《化学推进剂与高分子材料》2004,2(4):47-48
根据生产实践,总结蒽醌法生产双氧水中影响萃余液中双氧水含量的各种因素,指出萃余液中H2O2超标的危害,找到控制萃余的有效途径。 相似文献
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番茄红素含量测定中提取方法研究 总被引:1,自引:0,他引:1
采用紫外一可见分光光度法测定番茄酱中番茄红素的含量。在提取时间,提取次数,提取剂的选择等方面考察了影响番茄红素测定效果。试验结果表明:影响番茄酱中番茄红素的提取因素主次顺序为:料液比〉混合液〉提取时〉间提取次数:采用乙酸乙酯+乙醇(9+1)做提取剂,料液比为1:2,提取时间为30min.提取次数为1次,为番茄酱中番茄红素测定提取的最优组合。 相似文献
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竹叶黄酮提取分析方法的研究及其新进展 总被引:2,自引:0,他引:2
从竹叶黄酮的基本性质着手,根据其溶解性,显色反应等特性,选取适当的提取方法。综述了五种应用较广泛的提取新方法、新技术,及分析方法,并简要论述了各种新技术和方法的原理以及应用于竹叶黄酮工业生产方面的情况。 相似文献
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Eleni P. Kalogianni Despoina Georgiou Aggelos Charisis Stylianos Exarhopoulos Paraskevi Tzika 《Journal of the American Oil Chemists' Society》2023,100(4):317-327
This work examines the potential valorization of mullet roe by-products for the production of mullet roe oil using mild processes. Three different extraction methods with potential of scale-up for the food industry, namely pressure (PE), supercritical fluid extraction (SFE), and solvent extraction (SE) are examined. Mild temperature conditions to prevent oil oxidation and (wherever applicable) food-grade solvents are used. The oil yield, the composition of oils in fatty acids by GC-FID, the level of oil oxidation (peroxide value (PV), p-anisidine value (AV), K232 K268, TOTOX)) and the antioxidant activity (DPPH, ABTS) are determined. SE provided the highest oil recovery, followed by SFE and PE (68%, 28% and 10% respectively). The extracted oils had a high concentration of EPA and DHA and a total of 20.7%–24.3% of identified PUFAs among the fatty acids. Oxidation was the lowest in the SFE extracted oil followed by PE, PV was <2.5 meqO2, AV≤10 and TOTOX <15 in all examined oil samples. Further research is needed to optimize processing conditions for the increase in oil recovery. 相似文献