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微波萃取法提取水豆腐中大豆异黄酮工艺研究 总被引:1,自引:0,他引:1
文章以乙醇为溶剂,采用微波萃取法,对水豆腐中大豆异黄酮的提取工艺进行探究.通过单因素实验考察了乙醇浓度、提取温度、微波萃取时间、固液比对微波提取率的影响.结果表明:从水豆腐中提取大豆异黄酮的最佳提取工艺为:乙醇浓度70%,提取温度50℃,微波萃取时间30 min,固液比1∶12. 相似文献
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本文以烘干恒重的党参粉末为原料,研究微波提取法和乙醇浸提法的提取工艺和影响因素,并将这两种优化工艺条件进行比较。这两种方法都是以乙醇作为提取溶剂,分别研究溶剂浓度、液固比、提取时间、乙醇浸提的提取温度或微波提取的微波功率对党参皂甙提取率的影响。结果表明,微波提取法中4个因素影响党参皂甙提取率的主次顺序为乙醇浓度加热时间液固比微波功率,此方法的最佳提取工艺条件为:乙醇浓度为70%,液固比为80mL.g-1,提取时间为10×20s,微波功率为320W,皂甙提取率为3.15%。乙醇浸提法中4个因素影响党参皂甙提取率的主次顺序为乙醇浓度液固比加热时间提取温度,此方法的最佳提取工艺条件优化条件为:乙醇浓度为70%,液固比80mL.g-1,加热时间为80min,提取温度70℃,提取率为2.17%。结果证明,微波提取党参皂甙具有简便快速、高效节能、重复性好的优点。 相似文献
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研究微波辅助提取山竹夹层中黄酮类化合物的提取工艺与条件。采用正交试验法确定提取优化条件为:90%甲醇为提取溶剂,原料与提取剂的固液比1∶100,微波功率800 W,微波提取时间15 s,提取次数两次。对比传统溶剂提取法,微波辅助提取的一次提取量是传统溶剂提取法的1.65倍,提取时间则是后者的1/80。 相似文献
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文章以乙醇为溶剂,采用微波萃取法,对水豆腐中大豆异黄酮的提取工艺进行探究。通过单因素实验考察了乙醇浓度、提取温度、微波萃取时间、固液比对微波提取率的影响。结果表明:从水豆腐中提取大豆异黄酮的最佳提取工艺为:乙醇浓度70%,提取温度50℃,微波萃取时间30 min,固液比1∶12。 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
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香椿叶中总黄酮的提取工艺研究 总被引:2,自引:0,他引:2
研究了溶剂法提取香椿叶总黄酮的工艺条件。在单因素试验的基础上,用正交实验法对香椿叶总黄酮的提取工艺进行优选,考察乙醇体积分数、固液比、提取时间、浸提温度对香椿叶总黄酮提取率的影响。结果表明,在浸提3次条件下,得到叶片总黄酮最佳工艺条件为:乙醇浓度80%、固液比为1∶10(g/mL)、提取温度80℃、提取时间2 h,在此条件下香椿叶片总黄酮提取率为61.13%;叶轴总黄酮最佳提取条件为:乙醇浓度70%、固液比为1∶10(g/mL)、提取温度80℃、提取时间1 h,在此条件下香椿叶轴总黄酮提取率为71.71%。 相似文献
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Chlorophylls were extracted by using ultrasonic from Spirulina platensis. Single factor examination and response surface analysis experiments were adopted to investigate the effects of extraction time, extraction solvent, solvent concentration, ratio of liquid to solid and extraction grade. The results showed that the optimal process parameters for this method were: extraction time of 56.5 min, ethanol concentration of 48.3% (vol) of ethanol/acetone solvent, and ratio of liquid to solid of 7. 9 ml·g-1. The optimized chlorophylls extraction yield was 1.28%. The comparison experimental results indicated that the yield of chlorophylls by ultrasonic extraction was higher than that obtained from conventional solvent extraction. 相似文献
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The extraction of phosphoric acid by tributyl phosphate (TBP) in kerosene from hydrochloric acid leach liquor of El-Sebaeya low-grade phosphate ore was carried out. The influence of various factors affecting the leaching process such as particle size, reaction time, acid concentration, liquid/solid mass ratio, reaction temperature and stirring speed were thoroughly studied to estimate the favor phosphate ore dissolution in relation to impurity. Thereafter, the effects controlling the extraction step, including shaking time, solvent concentration, aqueous/organic phase ratio, and reaction temperature, have been studied in terms of the maximum P2O5 extraction efficiency and the minimum impurities extraction efficiency. The obtained loaded organic solvent was subjected to the stripping stage using double-distilled water. The outlet stripping liquor was concentrated by evaporation up to 62% P2O5. 相似文献
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Betulinic acid (3β, hydroxy-lup-20(29)-en-28-oic acid) is a bioactive triterpenic acid which was identified in various botanical sources and in considerable amounts in the bark of plane tree (Platanus acerifolia L.). In this work, the recovery of betulinic acid from plane tree bark was studied using different liquid solvent based extraction methods, namely solid–liquid extraction (SLE), ultrasound assisted extraction (UAE) and pressurized liquid extraction (PLE). Furthermore, preliminary studies of the supercritical fluid extraction (SFE) of plane tree bark are also reported.The liquid solvent based extraction techniques (SLE, UAE and PLE) were carried out using ethanol and ethyl acetate, and produced a recovery of betulinic acid in the range 10–15 mg/g of bark, with concentrations around 25–35% mass. A betulinic acid enrichment in the ethanolic extracts was possible by means of a simple precipitation step adding water. The precipitate contained 42–46% mass of betulinic acid and high recovery (>95%). Increasing the extraction temperature, by means of the PLE assays, has not resulted in an improvement of betulinic acid recovery.The preliminary SFE assays produced lower recoveries of betulinic acid (0.5–8 mg/g) with respect to liquid extraction. The addition of ethanol as cosolvent produced a significant improvement of both betulinic acid recovery and concentration in the SFE extract. 相似文献