蛇床子中蛇床子素的提取工艺研究

采用乙醇加热回流法提取蛇床子中的蛇床子素,对提取工艺进行优化。结果表明,最佳工艺条件为:提取液为75%乙醇溶液,用量为药材的8倍,提取时间为1.5 h和提取温度为80℃。     

淫羊藿苷提取工艺优化

通过正交实验优选淫羊藿苷的提取工艺,确定优化提取工艺条件为:60%乙醇、液固比为10∶1、提取1次、提取时间1.5 h,在此条件下淫羊藿苷的提取率为91.98%.     

微波无溶剂法提取薰衣草精油的工艺研究

采用微波无溶剂提取技术对威海本土种植薰衣草进行精油提取,考察微波无溶剂提取薰衣草精油工艺中提取时间、功率对薰衣草精油提取率的影响,探索微波无溶剂提取技术的最佳工艺。研究结果表明,微波无溶剂提取薰衣草精油的最佳工艺条件为:浸泡时间1.5 h,浸泡料水比1∶1.5,微波提取时间50min,微波提取功率500W,精油收得率3.75%。     

正交实验法优选黄连中盐酸小檗碱醇提工艺的研究

用乙醇提取黄连中盐酸小檗碱,采用正交实验法优化工艺条件.结果表明,优选的醇提工艺条件为：50％乙醇提取3次,每次提取时间1.5h,3次加醇量分别8,6,6倍.该醇提工艺重现性和稳定性良好.     

超声波协助提取茶多酚的工艺研究

研究了在超声波协助下采用正交设计法优选茶多酚的提取工艺。结果表明,影响茶多酚提取率的最佳工艺条件为:浸提温度70℃;时间1.5 h;料液比20∶1;乙醇浓度70%。影响茶多酚含量的最佳工艺条件为:浸提温度80℃;时间1.5 h;料液比15∶1;乙醇浓度70%。这些结果为改善茶多酚的提取条件提供了实验基础。     

草酸铵法和混合盐析法橘皮果胶提取工艺的对比研究

以汉中地产橘皮为原料,进行草酸铵法和混合盐析法橘皮果胶提取工艺条件的对比研究。实验结果表明,草酸铵法在浸提温度80℃、草酸铵浓度0.8%、料液比1∶30、浸提时间1.5h的最佳工艺条件下,果胶产率为35.6%;混合盐析法在浸提温度80℃、混合盐比12∶1、浸提时间1.5h、pH3.8的最佳工艺条件下,果胶产率为8.1%。因此,我们建议工业上用草酸铵法来提取果胶。     

荔枝核黄酮类化合物的提取工艺研究

采用回流、热浸提、微波提取等工艺提取荔枝核黄酮类化合物,采用正交实验考察了提取溶剂浓度、提取时间、微波功率、提取温度、料液比等因素对提取率的影响,优选出不同工艺的提取条件。回流提取工艺的优化条件是:50%乙醇溶液,提取温度80℃,提取时间1h,料液比1∶10,提取3次,总黄酮得率为6.76%。热浸提工艺的优化条件是:50%乙醇溶液,提取温度70℃,提取时间1.5h,料液比1∶12,提取2次,总黄酮得率达到6.37%。微波提取工艺的优化条件是:60%乙醇溶液,微波功率700W,提取时间2.5h,料液比1∶25,总黄酮得率达到6.86%。     

响应面优化酶法提取紫菜多糖工艺研究

利用纤维素酶辅助提取紫菜多糖,以酶添加量、提取温度、提取时间和pH作为响应面设计的变量.结果表明,纤维素酶辅助提取紫菜多糖的优化工艺条件为：酶添加量1.5％,提取温度51℃,pH 5.0,提取时间为80 min,在此条件下,多糖得率为19.46％.     

玛咖多糖提取工艺研究

以玛咖块根为原料,采用水提醇沉法提取玛咖多糖,通过单因素实验探究提取温度、提取时间、料液比对玛咖的多糖得率的影响。在此基础上通过正交试验和方差分析确定最佳提取工艺条件和主要影响因素。结果表明:提取温度和提取时间对玛咖多糖的得率均有显著影响,最佳提取工艺条件为温度60℃、时间1.5h、料液比1:25g/m L。在此工艺条件下,黄玛咖的多糖得率为8.72%,黑玛咖的多糖得率为8.26%,紫玛咖的多糖得率为9.02%。     

花生壳黄酮乙醇提取工艺探讨

研究了乙醇浸提工艺对花生壳总黄酮提取的影响.采用单因素实验和正交实验研究了不同工艺条件对花生壳黄酮提取效率的影响,并采用超声波辅助提取,确定了最佳浸提工艺及相关工艺参数.结果表明,最佳提取条件为:乙醇质量分数65%,料液比1∶40,pH 7.0,超声波频率40 kHz,超声波作用时间15 min,提取温度75℃,提取时间1.5 h,此时花生壳黄酮的提取量可达9.42 mg/g.     

A COMPARISON OF DIFFERENT TECHNIQUES FOR WATER-BASED EXTRACTION OF PECTIN FROM ORANGE PEELS

The extraction of pectin from orange peels has been studied using microwave and conventional extraction, with operating conditions including different extraction periods, different solvent pHs, and different types of solvent systems. The extracted pectin from orange peels was initially precipitated with concentrated ethanol and was quantified by the carbazole assay. For microwave extraction, the greatest total amount of pectin yield was found to be 5.27% on a dry basis for 15 minutes of extraction, although the greatest amount of material per unit time (%/min) was obtained after 5 minutes. This amount was the same as that extracted using Soxhlet extraction for three hours. The 15-minute microwave extraction period was further investigated at pH values of 1.5, 2.0, 5.5, and 10.0. The greatest amount of pectin was extracted from orange peels at the most strongly acidic condition of pH 1.5. The effect of a solvent system containing ethanol and EDTA (ethylenediamine tetraacetic acid) with a 15-minute extraction period and a pH of 1.5 was studied, giving approximately double the amount of pectin extracted using distilled water.     

A COMPARISON OF DIFFERENT TECHNIQUES FOR WATER-BASED EXTRACTION OF PECTIN FROM ORANGE PEELS

The extraction of pectin from orange peels has been studied using microwave and conventional extraction, with operating conditions including different extraction periods, different solvent pHs, and different types of solvent systems. The extracted pectin from orange peels was initially precipitated with concentrated ethanol and was quantified by the carbazole assay. For microwave extraction, the greatest total amount of pectin yield was found to be 5.27% on a dry basis for 15 minutes of extraction, although the greatest amount of material per unit time (%/min) was obtained after 5 minutes. This amount was the same as that extracted using Soxhlet extraction for three hours. The 15-minute microwave extraction period was further investigated at pH values of 1.5, 2.0, 5.5, and 10.0. The greatest amount of pectin was extracted from orange peels at the most strongly acidic condition of pH 1.5. The effect of a solvent system containing ethanol and EDTA (ethylenediamine tetraacetic acid) with a 15-minute extraction period and a pH of 1.5 was studied, giving approximately double the amount of pectin extracted using distilled water.     

氨性乙醇溶液从甘草中提取甘草酸工艺研究

以内蒙古赤峰甘草作为原料,对甘草酸粗提取的众多影响因素进行了深入研究。结果表明,氨性乙醇溶液提取法适合提取高纯度的甘草酸。最佳提取工艺为：含0．45％氨的30％乙醇溶液回流提取3次,第1次加入4倍量溶剂回流提取1．0h,第2,3次各加3倍量溶剂回流提取1．5h,提取液浓缩,调节pH至1．5,沉淀减压干燥至干,用D-101型大孔树脂纯化粗产品结果比较理想。     

镍电解一次铁渣浸出的研究

控制不同工艺条件浸出镍电解一次铁渣研究表明,升高温度有利于铁渣中铁、镍、铜元素的浸出;当反应体系温度≥60℃时,采用浓度为20%的硫酸浸出镍电解一次铁渣,反应1.5 h,可以将铁渣中的绝大多数铁、镍、铜元素浸出;正交实验表明,当控制反应时间为1.5 h时,镍电解一次铁渣浸出的最佳工艺条件为:硫酸浓度20%,反应液固比10∶4,反应温度90℃。     

绿茶中儿茶素的最佳提取条件研究

为了获得儿茶素乙醇提取工艺的最佳条件,主要研究了乙醇浓度、浸提温度和浸提时间对儿茶素乙醇提取效果的影响。依据儿茶素与香荚兰素的羟醛缩合生成红色产物的显色反应原理,以无机强酸为催化剂,用分光光度法对提取物中儿茶素含量进行测定。结果表明乙醇浓度、浸提温度、浸提时间对提取效果均有影响。正交试验结果表明,儿茶素的最佳提取和纯化条件为:乙醇浓度为75%,浸提温度为88.4℃,浸提时间为1.5 h,影响儿茶素提取效果的因素依次为:浸提温度>浸提时间>乙醇浓度。     

附子中总生物碱的提取工艺及含量测定

采用索式回流提取法用乙醇提取附子总生物碱,采用酸碱滴定法测定附子中总生物碱的含量。结果表明,总生物碱的最佳提取工艺:水的倍数为10,时间为1.5 h,提取次数为2次。     

超临界二氧化碳萃取腐竹中脂类物质的研究

采用超临界CO2萃取技术分离腐竹中的脂类物质,以脱油率为考察指标,研究了萃取压力、萃取温度对萃取最终脱油率的影响,并确定了超临界CO2流体萃取腐竹中脂类物质最佳工艺条件：萃取压力35 MPa,萃取温度45℃,分离温度30℃,萃取时间1.5 h,此工艺条件下出油率为4.79%。     

籽瓜皮果胶的提取工艺研究

为探究提取分离新疆籽瓜皮中果胶的最佳工艺,采用酸提醇析法探讨了原料预处理、萃取剂的种类、浓度和加入量、萃取温度、时间和浓缩比例等因素对果胶产率的影响.运用正交实验确定最佳的工艺条件为:以细渣状沸水浴灭酶3 min,硫酸为萃取剂,萃取液pH值为1.5,料液比为1:15,萃取2次,萃取温度为90℃,萃取时间分别为2.5 h和1 h,浓缩比例为1/4,冷却后经1:1.5倍乙醇沉淀,果胶产率为19.5%.