共查询到18条相似文献,搜索用时 125 毫秒
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采用超声波法从姜黄中提取姜黄素类化合物,比较了浸渍提取法与超声波提取法的提取效果;并在单因素实验的基础上,利用Design-expert进行了响应面优化分析,得出姜黄素的最佳提取工艺。结果表明:超声波提取法比浸渍提取法的效率明显提高;提取温度、料液比和乙醇浓度三者对姜黄素提取率的影响较为显著,不同存储期的姜黄中姜黄素的含量相差显著。响应面优化结果显示,姜黄素的最佳提取工艺为:提取温度为48℃,料液比为1∶30 g/mL,乙醇浓度为75%,最佳提取率为2.716 mg/g。 相似文献
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《生物质化学工程》2003,(4)
Z0 31 73 黄芩总黄酮苷元提取工艺 公开号 :CN 1 35990 3A ,公开日 :2 0 0 2 .7.2 4 以黄芩为原料 ,粉碎为粗粉 ,加入 1~ 1 0倍生药量水 ,煮沸后冷却 ,搅拌均匀 ,加盖密封 ,静置取出烘干。照流浸膏和浸膏剂项的渗漉法 ,加入 0 .2 2倍量乙醇 ,搅拌均匀 ,湿润装入渗漉筒 ,加入 0 .2 2倍量乙醇密封浸泡 ,继续加至 52 0倍量的乙醇渗漉 ,渗漉减压回收至相对密度 1 .0 1 1 .0 4 ,烘干即得。Z0 31 74 甲醛封闭吸除剂及其制备方法和使用方法 公开号 :CN 1 359992A ,公开日 :2 0 0 2 .7.2 4 主要由几丁聚糖、乙酸和水所组成。甲醛封闭吸… 相似文献
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超临界CO_2配合萃取巴戟天中的有害元素 总被引:3,自引:1,他引:2
以二乙基二硫代氨基甲酸钠(NaDDC)作为配合剂,乙醇为改性剂,采用超临界CO2配合萃取广东道地药材巴戟天中的有害元素Cu,Pb,As。考察了配合萃取方式、时间、压力、温度、配合剂用量等因素对中药材中有害元素萃取的影响。通过正交实验,建立了有害元素萃取工艺为:萃取压力28 MPa,萃取温度60℃,m(药材)∶m(NaDDC)=5∶1,m(药材)∶m(乙醇)=1∶1,静态萃取1 h,动态萃取2 h。在此条件下,巴戟天中Cu,Pb,As的脱除率均达60%以上,萃取后的药材中有害元素质量比达到美国FDA标准,而生理活性成分巴戟天多糖的质量比保持不变,研究成果为中药材中有害元素的脱除开辟了一条新途径。 相似文献
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研究了从荠菜中提取总黄酮的工艺条件及其含量的测定条件,探讨了乙醇浓度、提取时间和投料液同比(荠菜质量与乙醇用量比)对提取率的影响.结果表明最佳提取工艺为:乙醇浓度70%,提取时间11 h,固液比为1:14;用分光光度法进行含量测定的适宜条件为:测定波长为510 nm,NaNO25%、Al(NO3),10%、NaOH 4... 相似文献
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Luciana M. Rodriguez María B. Fernández Ethel E. Pérez Guillermo H. Crapiste 《European Journal of Lipid Science and Technology》2021,123(1):2000132
The main goal of this work is to evaluate the extraction of sunflower oil from enzyme-treated collets using ethanol and isopropanol (IPA) as solvents. The sunflower collets are pretreated with the multienzyme complex Viscozyme L prior to solvent extraction by the Soxhlet method. The influence of the moisture content of the collets, pretreatment, processing time, and solvent type on the amount of total extracted material and the oil extraction efficiency is studied. Some quality parameters such as phospholipid content of the oil and chlorogenic acid content of the residual meal are also analyzed. At low moisture content (7%) the solvents exhibit similar oil extraction ability (98–99%), but with increasing moisture the extraction efficiency of ethanol decreases to about 85%, while no significant differences are observed for IPA. The enzymatic treatment increases the extraction efficiency for all times, especially for ethanol. It is observed that IPA is more efficient in the extraction compared to ethanol, and the amount of nonlipid material is reduced by ≈70%. In addition, the oil extracted with IPA have lower phospholipid content and the residual meal presents a higher chlorogenic acid content. Practical Applications:This work would contribute toward the use of green solvents in the extraction of sunflower oil from collets. Ethanol and isopropanol, used as solvents, present attractive advantages, including low toxicity, good operational security, as well as being obtained from a renewable source. The obtained data provide up-to-date information on the use of these alcohols in the extraction of sunflower oil from collets and the influence of operating conditions, such as moisture content, enzymatic pretreatment of the collets, and the extraction time. Information about oil and meal quality is also reported. 相似文献
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以当归多糖得率为指标,采用正交实验法对提取过程中水用量、提取时间、提取次数及醇沉浓度对多糖得率的影响进行研究。结果表明,最优提取工艺为8倍用水量,提取时间3 h,提取次数2次,醇沉浓度为60%。 相似文献