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优化超声辅助离子液体提取荷叶黄酮工艺,并评价其抗氧化活性。以荷叶提取物为原料,在单因素试验基础上,以离子液体浓度、超声功率、超声时间为影响因素,黄酮提取率为评价指标,响应面法优化提取工艺,测定黄酮对 DPPH、·OH自由基的清除作用。最佳条件为0.9 mol·L-1的1-己基-3-甲基咪唑四氟硼酸盐([C6mim]BF4)溶液作为提取溶剂,固液比1:25 g·mL-1,超声功率186W,超声时间24min,提取温度70℃,提取率为4.65%。抗氧化活性研究表明,质量浓度为1.6 mg·mL-1时,荷叶黄酮对DPPH、·OH自由基清除率分别为63.2%和55.4%,IC50分别为0.8847mg·mL-1和1.1445mg·mL-1,还原力测定吸光度为0.72Abs。该方法稳定可靠,可用于超声辅助离子液体提取抗氧化活性较强的荷叶黄酮 相似文献
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目的:优选荷叶中荷叶碱的超声提取工艺。方法:以荷叶碱的提取率为指标,首先进行单因素试验,并且在此基础上以乙醇浓度、提取温度、提取时间及料液比为影响因素进行正交设计试验,优化提取工艺。结果:当用90%的乙醇,料液比为1︰40,提取温度为60℃,提取时间为25 min,提取一次,提取率最大,此时荷叶中荷叶碱的含量占总体取物的1.12%。结论:本实验为优化荷叶中荷叶碱的超声提取工艺提供了参考依据。 相似文献
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目的 研究超声法提取索骨丹中黄酮及多糖的最佳提取工艺.方法 通过单因素实验和正交实验,测定黄酮和多糖的提取率,分析料液比(g·mL-1)、超声时间、乙醇体积分数、提取次数对索骨丹中黄酮提取率的影响;料液比、超声时间、提取次数对索骨丹中多糖提取率的影响,优选了索骨丹中黄酮和多糖超声提取的最佳工艺条件.结果 索骨丹中黄酮的超声提取最佳工艺条件为:提取3次、料液比1:20、乙醇体积分数70%、提取时间40 min,提取率为9.85%;多糖的最佳提取工艺为:提取3次、料液比1:40、提取时间40 min,提取率为1.69%.结论 本实验对索骨丹中黄酮及多糖的超声提取工艺进行了优化,为索骨丹药材的质量控制和有效成分的开发利用提供实验参考. 相似文献
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用正交试验法确定了超声提取佩兰黄酮类化合物的最佳工艺参数。最佳提取条件为:70%乙醇为溶媒,超声功率为50kHz时,超声时间30min、超声温度40℃、物料比1:15,提取4次,在此条件下能达到最佳的提取效果,稳定性良好。对佩兰提取的黄酮成分进行抗菌研究发现,其对四联球菌、金黄色葡萄球菌、大肠杆菌和枯草杆菌具有一定的抑菌作用。 相似文献
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以河北衡水湖的风干荷叶为材料,进行单因素实验,然后使用正交实验来确定荷叶黄酮的提取条件.最佳的提取条件为:超声时长45 min,温度45℃,料液比1:12(g/mL),乙醇浓度75%.抗氧化性实验表明:荷叶总黄酮具有一定的还原能力,且对自由基的清除能力与浓度成正比. 相似文献
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在单因素实验的基础上,通过响应面法分析和优化提取条件,考察超声酸提法中酸的种类、酸的质量分数、超声时间、液固比〔液体体积(m L)与固体质量(g)的比值〕、超声功率和温度对荷叶碱提取效果的影响以及D101型大孔树脂对提取物的纯化效果。得到的荷叶生物碱盐的最佳提取工艺条件为:加热温度60℃、超声功率500 W、盐酸质量分数0.3%、超声时间41 min、液固比27,在该工艺条件下荷叶碱的得率为(4.12±0.05)mg/g。以体积分数为70%的乙醇作为洗脱液,纯化后的生物碱盐经分光光度法测得纯度为40.81%。 相似文献
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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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葛根总黄酮的提取研究 总被引:1,自引:0,他引:1
用超声辅助提取葛根总黄酮,考察了超声功率、超声作用时间、提取温度和乙醇浓度等因素对葛根总黄酮提取率的影响。结果表明,超声提取葛根总黄酮的较佳工艺条件为:超声功率270 W,超声作用时间20 min,提取温度70℃,乙醇浓度为65%,此条件下总黄酮提取率为167.974 mg/100 g葛根粉。 相似文献
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Extraction optimization of oleanolic and ursolic acids from pomegranate (Punica granatum L.) flowers
《Food and Bioproducts Processing》2014,92(3):321-327
An ecofriendly ultrasonic-assisted extraction (UAE) technique was developed for rapid extraction of bioactive compounds oleanolic and ursolic acids from pomegranate flowers. Several different influential extraction parameters, such as ultrasonic power, extraction time, solvent type, aqueous ethanol concentration, loading ratio and extraction temperature, were investigated. The optimum extraction conditions were 90% ethanol solution as solvent, ultrasound power 150 W, the liquid:material ratio of 20:1 (v/w) and extraction for 50 min at 40 °C. Scanning electron microscopy showed that ultrasonic treatment resulted in a number of pits on cells of pomegranate flowers. Extracts obtained from 30 min of UAE showed higher antioxidant activity than those of other conventional methods. The UAE method was more efficient than classical methods included maceration, stirring extraction and heat reflux extraction. 相似文献
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《分离科学与技术》2012,47(13):1987-1997
Ultrasonically assisted extraction (UAE) technique was developed for the simultaneous extraction of three main flavonoids, that is, isoorientin, orientin, and vitexin, from bamboo leaves of N. affinis, a discarded waste in the locality in this present work. Extraction conditions for each compound were optimized by factorial design coupled with exploration of interaction among factors using selectivity and yield of total flavonoids as evaluation indexes. The optimum conditions for UAE of these flavonoids were obtained. Recovery test and repeatability analysis of UAE technique under the optimized conditions was proven to be satisfactory for flavonoids investigated. Compared with the conventional refluxing extraction, ultrasonic method produces higher yields for each of flavonoids investigated and total flavonoids, with comparable selectivity for three flavonoids. Highly effective extraction of ultrasonic technique for flavonoids indicated it application prospect in the extraction of topic plant. 相似文献
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