微波辅助提取花生壳中总黄酮的工艺研究

研究了微波辅助提取花生壳中总黄酮的工艺条件,考察了乙醇浓度、料液比、微波时间、微波温度、微波功率对总黄酮提取率的影响,通过正交试验优化了提取工艺。结果表明最佳工艺条件为：乙醇浓度80%、料液比1：18、微波时间6min、微波温度70℃、微波功率500W,在此条件下,总黄酮提取率可达10.660mg/g。     

响应面法优化超声辅助提取佛手瓜总黄酮的工艺研究

本试验研究了超声辅助提取佛手瓜中总黄酮的工艺。在单因素试验基础上,考察乙醇浓度、超声温度、液料比和超声时间对佛手瓜总黄酮提取率的影响。根据Box-Benhnken中心组合试验设计原理,采用响应面法对佛手瓜总黄酮提取的关键参数进行了优化,建立了佛手瓜总黄酮提取率的数学模型。结果表明:4个因素对佛手瓜总黄酮提取率影响的大小顺序是超声温度超声时间液料比乙醇浓度。佛手瓜总黄酮的最佳提取工艺条件为:乙醇浓度69%、超声温度71℃、液料比25 m L/g、超声时间31 min,在此条件下总黄酮提取率为3.402%,与理论预测值相对误差为0.526%。与传统热水浸提法相比,提取率提高了12.69%。     

响应面法优化酸藤子叶总黄酮的超声提取工艺

为了利用响应面法优化酸藤子叶中总黄酮的超声提取工艺,以总黄酮提取率为评价指标,在单因素试验的基础上,根据Box-Behnken响应面分析法确定最佳工艺条件。结果表明:各因素对总黄酮提取率的影响大小依次为乙醇浓度液料比提取时间;提取酸藤子叶总黄酮的最佳工艺条件为乙醇浓度58%,液料比21∶1,提取时间40 min,根据此条件酸藤子叶总黄酮的提取率为1.009%。说明采用响应面法优化酸藤子叶总黄酮提取工艺切实可行。     

正交优化微波辅助提取艾叶中总黄酮工艺条件研究

以艾叶为原料,研究采用微波法辅助提取艾叶中总黄酮的提取工艺。实验中以总黄酮的提取率为考察指标,考察乙醇体积分数、料液比、微波温度、微波时间、微波功率五个因素对艾叶中总黄酮提取率的影响。通过正交试验优化艾叶中总黄酮的提取工艺,结果表明,最佳工艺条件是：乙醇体积分数为50％、料液比为1：20、微波温度为60℃、微波时间为5min、微波功率300W。在此最佳工艺条件下,艾叶中总黄酮的提取率为3．684％。     

野菊花中总黄酮不同提取方法工艺研究

以野菊花为原料,在单因素实验基础上,分别采用超声波辅助和微波辅助提取野菊花中总黄酮,并对提取工艺进行优化。结果表明:超声波提取的最佳工艺条件为超声时间30 min、料液比1∶15、乙醇浓度50%、超声温度60℃。微波辅助提取的最佳工艺条件为:料液比1∶25、微波时间2 min、乙醇浓度70%、微波温度60℃。在最佳提取工艺条件下,超声波法的总黄酮提取率(8.984%)高于微波法的总黄酮提取率(8.482%)。     

超声法与闪式提取法提取枳实总黄酮的工艺对比研究

为优化枳实总黄酮的提取工艺，分别采用超声法和闪式提取法提取枳实总黄酮并比较。单因素试验考察提取溶剂浓度、料液比、时间和功率，正交试验优化最佳工艺。以枳实总黄酮(柚皮苷、新橙皮苷)提取率为指标，采用超快速液相色谱法测定枳实总黄酮含量以确定最佳提取方法。结果显示最佳工艺为：闪式提取法以50%乙醇为溶剂、料液比1∶70、提取3 min,提取率为18.65%。与超声法相比，闪式提取法省时、高效，更适合工业化生产，可为枳实在兽药领域的应用提供参考。     

瑞香狼毒生物农药成分提取条件优化

采用超声醇提的方法对瑞香狼毒(Stellera chamaejasma L.)中具有代表性的总黄酮进行提取,通过开展超声时间、超声功率、料液比、乙醇浓度4个因素单因素试验和正交试验探索狼毒总黄酮提取的最佳提取条件。数据分析得到显著(P0.05)影响狼毒总黄酮提取的因素分别为:乙醇浓度超声时间料液比超声功率,其中最优提取条件为超声时间20min,超声功率240 W,料液比1/10,乙醇浓度80%。     

超声波辅助乙醇-硫酸铵双水相体系提取绞股蓝总黄酮工艺研究

本文采用超声波辅助乙醇-硫酸铵双水相体系提取绞股蓝总黄酮,并优化其工艺条件。在单因素试验的基础上结合正交试验,以总黄酮提取量为指标,探讨料液比、乙醇浓度、硫酸铵用量、超声功率和超声温度对绞股蓝总黄酮提取量的影响。结果表明：超声辅助乙醇-硫酸铵双水相提取绞股蓝总黄酮的最优工艺为：料液比1:30 （g/mL）,乙醇浓度50%,硫酸铵用量0.25 g/mL,超声功率240 W,超声时间40 min,超声温度70 ℃。在此条件下,总黄酮提取量为15.90 mg/g。超声波辅助乙醇-硫酸铵双水相提取绞股蓝总黄酮的效果较好,是提取绞股蓝中总黄酮的有效方法。 [关键词] 绞股蓝|总黄酮|超声波|乙醇-硫酸铵|双水相体系     

微波辅助提取茄子根中总黄酮工艺条件研究

以烘干茄子根为原料,以茄子根中总黄酮提取率为指标,利用微波辅助提取茄子根中总黄酮。选取乙醇浓度、微波时间、微波温度、微波功率、料液比为单因素试验,在单因素试验基础上,以正交试验设计方法优化提取工艺。结果表明,最佳工艺条件为:乙醇浓度为80%、微波时间为4min、微波温度为60℃、微波功率为300W、料液比1∶20(g/mL),在此最佳条件下,茄子根总黄酮的提取率达1.652%。     

苦荞壳和苦荞籽中总黄酮的提取及含量比较

本实验研究了苦荞壳和苦荞籽中总黄酮的超声提取工艺。在单因素实验研究的基础上通过正交实验优化了提取工艺条件。优化所得最佳超声提取苦荞壳总黄酮工艺条件为:乙醇体积分数60%,超声功率200W,超声时间60min,料液比1:25g/m L,超声温度60℃;最佳苦荞籽总黄酮提取工艺条件为:乙醇体积分数60%,超声功率200W,超声时间50min,料液比1:25g/m L,超声温度60℃。对应的最佳提取条件下,苦荞壳和苦荞中总黄酮的提取率分别为4.052%、6.559%、苦荞壳中总黄酮含量丰富,作为苦荞的副产物完全可以在饲料中开发利用,提高苦荞壳的经济价值。     

响应面分析法优化党参总黄酮提取工艺研究

研究响应面分析法优化党参中黄酮的提取工艺。在乙醇浓度、料液比、提取时间和提取温度4个单因素实验基础上,通过响应面法优化党参中黄酮的提取条件。结果表明,党参黄酮的最佳提取工艺条件为：提取时间68 min,提取温度85℃,乙醇浓度90%,料液比1∶40（g.mL-1）。在此条件下黄酮提取率的实测值为0.839%,理论值为0.834%,两者的相对误差为0.60%,说明采用响应面法优化得到的提取条件切实可行。     

超声波协同双水相体系提取茴香茎中总黄酮及其抗氧化性研究

将超声波技术和双水相体系萃取技术综合应用于提取茴香茎中总黄酮。通过单因素试验和正交试验相结合,得出影响茴香茎中黄酮提取因素的主要次序为提取液浓度>提取时间>料液比。最佳提取工艺条件为乙醇体积分数50%、料液比1∶15、超声时间20 min。抗氧化能力检测表明,该提取物抗氧化性显著,且浓度越高,其抗氧化性越强。     

唐古特白刺中黄酮类化合物正交提取工艺与体外抗菌活性研究

用索氏回流法正交提取唐古特白刺中的黄酮类化合物,用黄酮类化合物最大吸光度（吸收波长510 nm）对提取物进行可见光谱检测,测定黄酮类化合物的含量。以芦丁标准品做对照,对比选取最佳提取工艺;并对两种供试菌进行体外最小抑制浓度（MIC）测定。结果表明,乙醇浓度、乙醇用量、回流时间、超声功率、超声时间的不同对唐古特白刺中黄酮的提取均有影响。其最佳工艺参数为：乙醇浓度65%、乙醇体积250 mL（唐古特白刺10.0 g）、回流时间1 h、超声功率70%、超声时间40 min;对大肠埃希氏杆菌、金黄色葡萄球菌的MIC分别为0.35 mg/mL和0.50 mg/mL。     

Content Determination of Total Flavonoids from Rosa laevigata Michx. Fruits and Optimization of Cellulase-assisted Extraction

To determine the content of total flavonoids from Rosa laevigata Michx. fruits, and optimize the process of cellulase-assisted extraction, the content of total flavonoids from Rosa laevigata Michx. fruits were determined with a double-wavelength spectrophotometry with detection wavelength were 500 nm and 580 nm as the reference, using rutin as a standard material, and the process of cellulase-assisted extraction designed by orthogonal test was optimized with the yield of flavonoids as the evaluation index, and the effects of extraction temperature, concentration of ethanol, cellulase dosage, ratio of liquid to material and other 4 factors on the content of total flavonoids were investigated. It showed a good linearity (r=0.9981) between absorbance difference(ΔA) and the rutin mass ranging of 19.90 to 398.00 μg, the standard curve equation was y=0.0008x-0.0047, and the yield of total flavonoids was 87.94 mg/g, the average recovery and RSD were 98.23% and 8.77%, respectively. And the optimumcellulase-assisted extraction conditions of total flavonoids from Rosa laevigata Michx. fruits by orthogonal array design were extraction temperature of 80℃, concentration of ethanol of 40%, cellulase dosage of 0.5%, ratio of liquid to material of 40:1, extraction time of 90 min, pH of 6.0, and extraction numbers of 2. Various factors affecting extracting yield were in a order of extraction temperature > cellulase dosage > ratio of liquid to material > concentration of ethanol. In this condition of extraction, yield of total flavonoids from Rosa laevigata Michx. fruits was (93.35±3.15) mg/g. Therefore, it was suggested that extraction of total flavonoids from Rosa laevigata Michx. fruits by cellulase-assisted extraction was feasible, and the yield of total flavonoids was higher and its conditions was mild.     

金樱子总黄酮的含量测定及酶提工艺优化

为了测定金樱子中的总黄酮含量,并对其纤维素酶辅助提取工艺进行优化,本研究以芦丁为对照品,采用双波长分光光度法,确定测定波长500 nm,参比波长580 nm,对金樱子中的总黄酮含量进行测定;以总黄酮得率为评价指标,考察提取温度、乙醇浓度、纤维素酶用量、液料比等4个因素对总黄酮得率的影响,正交优化纤维素酶辅助提取金樱子总黄酮的工艺。结果表明,在19.90~398.00 μg范围内,芦丁的质量与吸光度差值ΔA呈良好的线性关系（r=0.9981）,标准曲线方程为y=0.0008x-0.0047,该方法下测得其得率为87.94 mg/g,平均加样回收率98.23%,相对标准偏差为8.77%;正交试验优化的纤维素酶法辅助提取金樱子总黄酮的最佳工艺条件为：提取温度80℃、乙醇浓度40%、纤维素酶用量0.5%、液料比40：1、提取时间90 min、pH为6.0、提取次数2次,且各因素对金樱子总黄酮提取得率的影响顺序为：提取温度 > 纤维素酶用量 > 液料比 > 乙醇浓度;在该提取条件下,金樱子总黄酮得率为（93.35±3.15）mg/g。因此,纤维素酶法辅助提取金樱子总黄酮可行,得率较高,条件温和。     

微波辅助提取黄芩黄酮的研究

目的：利用微波辅助浸提技术从黄芩中浸提黄酮。方法：采用单因素试验考察了浸提剂、液固比、浸提温度、颗粒粒度、微波功率和浸提时间对黄芩黄酮浸提率的影响。结果：微波辅助提取黄苓黄酮的最佳工艺50％乙醇为浸提剂、液固比为20mL／g、浸提温度为90．0℃、浸提时间为8．0min,颗粒粒度为40目,微波功率为600W,此条件下黄酮的浸提率为99．42％;高于常规回流4h。结论：微波辅助提取技术应用于黄芩黄酮的提取具有省时、高效、节能等优点。     

白头翁提取方法比较

本试验采用热回流和超声两种不同提取方法,以水及不同浓度的乙醇溶液为溶剂,制备10个样品,采用高效薄层色谱法、高效液相色谱法,通过比较得膏率、色谱图、白头翁皂苷B4峰面积等,考察提取方法对白头翁活性成分的影响。结果表明,两种提取方法中,热回流提取得膏率、白头翁皂苷B4得率均较超声提取法高;乙醇浓度对皂苷B4的提取有一定影响,热回流提取70%～80%乙醇提取率最高,超声提取50%～70%乙醇提取率最高。研究结果为白头翁提取方法的选用提供了科学数据。     

正交试验法优化杜仲叶中绿原酸提取工艺研究

文章以杜仲叶为原料,采用微波辅助提取杜仲叶中的绿原酸,研究可能影响绿原酸提取率的5个因素：微波功率、微波时间、微波温度、乙醇浓度、料液比。通过正交试验法优化杜仲叶中绿原酸的提取工艺,结果表明,最佳工艺条件是：微波功率300W、微波时间为6min、微波温度为60℃,乙醇浓度为60％、料液比为1：20。在此最佳工艺条件下,绿原酸的提取率为5．168mg／g。     

Study on the Optimum Extraction Process of Mulberry Leaf Polysaccharide

The experiment was conducted to study the best extract process of mulberry leaf polysaccharide,three factors and three levels orthogonal test was designed to optimize the extraction process.Three factors were considered,including ratio of solid to liquid,decoction time,the time of extracting and the yield of mulberry leaf polysaccharide was determined with phenol-sulfurie acid colorimetry as the evaluate index.Meanwhile,the influence of ethanol concentrations on mulberry leaf polysaccharide extract was studied.The results showed that decoction times could greatest affect the extraction percent of the polysaccharides.The extraction percent of polysaccharide was the highest (4.94%) when the rate of solid to liquid was 25,the time of extracting was 2 h and decoction times was 2.While the most appropriate process was 25 times for the rate of sdid to liquid,2 h for extracting and decoction times was 3,considering with practical situations.The concentration of ethanol would significantly affect polysaccharides yield and purity.When the concentration of ethanol was 70%,the yield of mulberry leaf polysaccharid was highest.When the concentration of ethanol was 40%,the content of mulberry leaf polysaccharide was highest (41.5%),significantly higher than other ethanol concentration (P < 0.05).It suggested that the higher the ethanol concentration,the lower the polysaccharide content,but the higher the yield.The optimum extraction of mulberry leaf polysaccharides were that the rate of solid to liquid was 25,extractign for 2 h,decoction 3 times and 70% ethanol precipitation.