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龙牙楤木总皂苷提取工艺的优化 总被引：1，自引：0，他引：1
目的确定龙牙楤木总皂苷的最佳提取工艺。方法采用正交试验比较超声提取法、微波提取法和热回流浸提法提取龙牙楤木总皂苷的工艺及效率。结果超声法的最佳提取工艺为:料液比1:30、80%乙醇、时间60min,皂苷得率为7.56﹪;微波法的最佳提取工艺为:料液比1:25、80%乙醇、时间50s、功率6400w,皂苷得率为7.32﹪;热回流法的最佳提取工艺为:料液比1:25、时间2.5h、60%乙醇、温度60℃,皂苷得率为7.19﹪;结论超声提取法优于微波提取法和回流提取法。 相似文献
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目的对人参的快速提取工艺方法进行了考察,为工业化生产提供可靠的实验数据和理论依据。方法采用正交实验设计提取方法,HPLC法测定人参皂苷Rg1、Re含量。结果提取人参中的人参皂苷Rg1＋Re最佳提取工艺为A2B2C2;提取人参浸膏最佳提取工艺为A2B3C2;对Rg1＋Re影响因素的大小依次为：料液比、电场强度、脉冲数;对浸膏得率影响因素的大小依次为：电场强度、料液比、脉冲数。此法提取人参中的人参皂苷Rg1＋Re达0.381%,得膏率达40.983%。结论本提取工艺可行,经济、省时、回收率高。 相似文献
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目的：在保证原工艺基本稳定的前提下，对附子理中片中人参提取时间进行优化。方法：以人参皂苷Re的含量为检测指标，采用高效液相色谱法测定各样品的含量，结合浸膏收率进行综合评价，确定最佳的提取时间。结果：浸膏收率和人参皂苷Re含量相对较高的两次煎煮时间分别为135min、75min。结论：该研究方法简便，准确，优化得到的工艺可以用于大工业生产。 相似文献
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采用响应面法优化超声波辅助提取薏苡仁低聚糖的工艺条件。在单因素试验基础上,选取液料比、超声波时间以及超声波功率3个因素结合Box-Behnken试验建立数学模型,分析考察3个因素对薏苡仁低聚糖响应值的影响程度,优化工艺参数。各因素对薏苡仁低聚糖提取率影响程度从大到小顺序依次为:超声波功率超声波时间液料比。响应面设计法优化出其最佳超声波提取条件为:超声波温度70℃,液料比33∶1(m L/g),超声波时间27 min,超声波功率450 W。在该条件下,薏苡仁低聚糖提取率为0.94%,与模型预测值0.98%接近。说明使用响应面法优化超声波辅助提取薏苡仁低聚糖的工艺条件是可行的。 相似文献
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目的探讨新型辅料人参———葛根人参的加工工艺,并建立葛根人参及红参中人参皂苷Re的含量比较方法。方法采用70%乙醇超声提取葛根中的有效成分,旋转蒸发仪适当浓缩,浸入人参煎煮,待葛根提取液完全浸入参体后烘箱35℃低温干燥得葛根人参;以甲醇超声提取红参及葛根人参,点板(硅胶G板),进行薄层扫描(λS=550 nm,λR=650nm)。结果人参皂苷Re点样量在2～18ul范围内,点样量与峰面积呈良好的线性关系,得标准曲线Y=161.2X-166.84,r=0.9994;红参及葛根人参中人参皂苷Re的含量分别为0.19%和0.21%。结论薄层扫描法操作简便,结果准确,可以用作比较红参及葛根人参中人参皂苷Re的含量。 相似文献
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目的考察不同提取方法对西洋参皂苷含量的影响。方法分别选择甲醇、乙醇、水三种不同试剂结合浸泡提取法、回流提取法、超声提取法三种方法提取皂苷,采用高效液相色谱法测定上述不同提取液中Rgl、Re、Rb。的含量。结果人参皂苷Rgl、Re、Rb。在测定范围内具有良好的线性关系。该实验方法可以在相关工作生产中实际应用。不同提取方法中人参皂苷Rbl含量略有影响。结论乙醚脱脂50％乙醇超声提取法中的人参皂苷Rgl和Re含量高于其他提取方法．乙醚脱脂甲醇回流提取法中人参皂苷Rb,含量高于其他提取方法。 相似文献
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该研究以人参籽为原料,采用超临界CO2流体技术萃取人参籽油,通过正交试验优化了萃取人参籽油工艺参数,再将其与通过冷榨法及溶剂法提取的人参籽油进行对比,测定和比较了不同工艺制取的人参籽油的脂肪酸组成。试验结果表明,在萃取压力26MPa、萃取温度50℃、萃取时间2 h工艺条件下,人参籽油得率为16.2%。经检测,人参籽油脂肪酸组成为不饱和脂肪酸占99%以上,其中油酸含量极高,可达73.93%。通过不同制取方法所得到的人参籽油的脂肪酸组成分析表明,超临界CO2萃取法与溶剂萃取法所提取人参籽油的脂肪酸明显多于压榨法的脂肪酸成分;且超临界CO2萃取法具有无有机化学试剂残留的明显优势,因此,是未来人参籽油提取中可以应用的一种绿色环保的提取工艺和技术。 相似文献
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《Industrial Crops and Products》1999,9(3):171-181
Sunflower heads are a promising commercial source of low-methoxyl pectin. Although previously reported research was based on a batch extraction process, examples of continuous, countercurrent processes are found with other commodities (beet sugar, vegetable oil). The two types of processes were compared using ground, washed, and dried sunflower heads with 0.75% sodium hexametaphosphate (SHMP) extractant. Under the conditions of pH 2–3.5 at liquid-to-solid (L/S) ratio 32, and L/S ratio 30–45 at pH 3.23, the maximum pectin recovery was similar for the two processes. However, the continuous process maintained maximal recovery over a wide range of pH and L/S ratio. Pectin productivity, which is the rate of pectin extraction per working volume, was much higher in the continuous process than the batch process. At pH 2.5 and L/S ratio 32, it was more than 100% higher. Consequently, the continuous process achieved adequate pectin recovery with less solvent and can be conducted with smaller-size equipment than the batch. 相似文献
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Monica Gallo Manuela Vitulano Anna Andolfi Marina DellaGreca Esterina Conte Martina Ciaravolo Daniele Naviglio 《Plant foods for human nutrition (Dordrecht, Netherlands)》2017,72(2):141-148
Stevioside and rebaudioside A are the main diterpene glycosides present in the leaves of the Stevia rebaudiana plant, which is used in the production of foods and low-calorie beverages. The difficulties associated with their extraction and purification are currently a problem for the food processing industries. The objective of this study was to develop an effective and economically viable method to obtain a high-quality product while trying to overcome the disadvantages derived from the conventional transformation processes. For this reason, extractions were carried out using a conventional maceration (CM) and a cyclically pressurized extraction known as rapid solid-liquid dynamic extraction (RSLDE) by the Naviglio extractor (NE). After only 20 min of extraction using the NE, a quantity of rebaudioside A and stevioside equal to 1197.8 and 413.6 mg/L was obtained, respectively, while for the CM, the optimum time was 90 min. From the results, it can be stated that the extraction process by NE and its subsequent purification developed in this study is a simple, economical, environmentally friendly method for producing steviol glycosides. Therefore, this method constitutes a valid alternative to conventional extraction by reducing the extraction time and the consumption of toxic solvents and favouring the use of the extracted metabolites as food additives and/or nutraceuticals. As an added value and of local interest, the experiment was carried out on stevia leaves from the Benevento area (Italy), where a high content of rebaudioside A was observed, which exhibits a sweet taste compared to stevioside, which has a significant bitter aftertaste. 相似文献
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In the search for bioactive natural products, our lab screens hydrophobic extracts from marine fungal strains. While hydrophilic active substances were recently identified from marine macro-organisms, there was a lack of reported metabolites in the marine fungi area. As such, we decided to develop a general procedure for screening of hydrophobic metabolites. The aim of this study was to compare different processes of fermentation and extraction, using six representative marine fungal strains, in order to define the optimized method for production. The parameters studied were (a) which polar solvent to select, (b) which fermentation method to choose between solid and liquid cultures, (c) which raw material, the mycelium or its medium, to extract and (d) which extraction process to apply. The biochemical analysis and biological evaluations of obtained extracts led to the conclusion that the culture of marine fungi by agar surface fermentation followed by the separate extraction of the mycelium and its medium by a cryo-crushing and an enzymatic digestion with agarase, respectively, was the best procedure when screening for hydrophilic bioactive metabolites. During this development, several bioactivities were detected, confirming the potential of hydrophilic crude extracts in the search for bioactive natural products. 相似文献
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为优化罗望子果肉浸提工艺,提供罗望子果肉加工与罗望子果肉活性物质研究的理论依据。本研究以多糖提取率、原料利用率、总酚提取率和总黄酮提取率为响应值,以熵权法赋权,通过响应面法对罗望子果肉纤维素酶法浸提工艺进行优化,并对其浸提过程中浸提液的抗氧化活性变化进行了研究。结果发现罗望子浸提液对于OH?清除能力极强,均大于190 mg/100 mL,OH?清除能力和ABTS +?清除能力对提取条件的变化敏感。考虑实际情况得到最佳提取工艺的提取时间为51 min,料液比为1:10.9（g/mL）,纤维素酶添加量为质量比1.5‰,在此条件下,罗望子果肉多糖提取率为12.66%,原料利用率为88.24%,总酚提取率为4.79‰,总黄酮提取率为4.38‰,与理论预测值接近。该模型能较好预测罗望子果肉的浸提工艺,可以用于保健饮料加工。 相似文献
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为了分析香水莲花的植物甾醇含量并优化其超声提取工艺,采用高效液相色谱（HPLC）法测定香水莲花中菜籽甾醇、菜油甾醇和β-谷甾醇的含量,再以上述3种甾醇提取量为评价指标,对液料比、超声提取温度和超声提取时间进行单因素试验,在此基础上,再采用Box-Behnken响应面法优化香水莲花甾醇提取工艺并进行验证。结果表明,影响香水莲花甾醇提取量的主次因素是液料比>提取时间>提取温度,其最优工艺条件为以95%乙醇为提取溶剂、超声功率100 W、液料比30∶1（mL/g）、超声提取温度60 ℃、超声提取时间30 min;在最优工艺条件下进行验证实验,得出香水莲花中甾醇含量为菜籽甾醇64.61 mg/100 g、菜油甾醇40.77 mg/100 g、β-谷甾醇99.04 mg/100 g,总甾醇204.42 mg/100 g,综合评分与预测值相比差异不显著（P<0.05）。研究结果为香水莲花资源的开发和利用提供参考。 相似文献