共查询到20条相似文献,搜索用时 78 毫秒
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以花色苷收率为评价指标,采用单因素实验及响应面法优化微波辅助磷酸水溶液提取紫甘薯花色苷的工艺条件,确定最优提取工艺为:微波功率400 W、磷酸浓度1.2%、液料比15∶1(mL∶g)、微波辐照时间4min,在此条件下,紫甘薯花色苷收率达到51.21 mg·(100g)~(-1),与响应面模型预测值[53.61 mg·(100g)~(-1)]的相对误差为-4.48%。HPLC分析结果表明,紫甘薯的微波辅助磷酸水溶液提取液的主要成分与磷酸提取液、柠檬酸提取液基本一致。微波辅助磷酸水溶液提取紫甘薯花色苷具有成本低、省时、节能、环保等特点。 相似文献
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摘要:以蓝莓果渣为原料,在单因素实验的基础上通过响应面优化得到超声波辅助酶法提取花色苷的最佳工艺,并通过构建降解动力学模型考察不同光照时间和温度对花色苷稳定性的影响。结果表明:超声波辅助酶法提取蓝莓花色苷工艺的最佳参数为:乙醇体积分数60%、液料比40:1(mL/g)、酶解时间80 min,花色苷得率为10.571±0.080 mg/g。花色苷在不同光照时间和温度下的降解模型均符合零级动力学方程。紫外光、日光灯、避光条件对花色苷稳定性影响程度依次减弱,4℃下保存花色苷其损失量仅为5.5%;在40~80℃范围内,花色苷的热降解速率随着温度的升高而增加,半衰期随着温度的升高而降低,温度系数Q10随温度的升高而增大,活化能Ea为46.6729 kJ/mol。此外,由热力学参数可知花色苷热降解为非自发反应。研究结果可为蓝莓资源的有效利用及其应用潜力和价值的提升提供参考。 相似文献
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对国产红豆越橘中花色苷的提取工艺进行了研究,得到了最佳提取工艺,即pH值为2的酸性水液提取,超滤法纯化。 相似文献
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本文采用溶剂浸提法提取紫甘蓝花色苷,通过单因素实验和正交实验,以浸提液吸光度A为考察指标,对影响花色苷提取效果的各因素进行了研究。结果表明,各因素对紫甘蓝花色苷提取效果的影响程度依次为:浸提次数浸提温度乙醇浓度料液比浸提时间;紫甘蓝花色苷的最优提取工艺条件为以60%的乙醇水溶液为浸提剂,料液比1∶75(g∶ml),在80℃下恒温提取80min,提取2次。 相似文献
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采用乙醇提取蓝莓花色苷,对提取剂浓度,料液比,pH值和提取温度及时间进行研究,结果表明其最佳工艺条件为:60%乙醇浓度,料液比为1 g∶10 mL,pH 4.0,50℃下提取60 min。研究了K+、Ca2+、Al3+、Fe2+对蓝莓花色苷稳定性的影响,其中K+、Ca2+对蓝莓花色苷稳定性无明显影响,Al3+对蓝莓花色苷有增色作用,Fe2+对蓝莓花色苷稳定性有破坏作用,使吸光值急剧下降,过氧化氢对蓝莓花色苷稳定性影响较大。 相似文献
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采用正交实验法(采用b(34))对桑叶中黄酮多酚类物质提取条件进行了分析,优化乙醇浓度、料液比、提取时间和温度等因素对桑叶中总黄酮与桑多酚提取率的影响。结果表明:当料液比1:60,乙醇体积浓度60%,提取温度100℃,提取时间2.5h,从桑叶中提取的总黄酮与桑多酚的提取率达最高。 相似文献
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总结了花色苷的提取方法,主要有浸取法(包括水提法、有机溶剂提取法)、超声提取法、微波提取法、酶解提取法、超高压提取法等,对各种提取方法的优缺点进行了比较,并对花色苷提取方法的研究前景进行了展望。 相似文献
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Eun-Ji Go Byeong-Ryeol Ryu Su-Ji Ryu Hyun-Bok Kim Hyun-Tai Lee Jin-Woo Kwon Jong-Suep Baek Jung-Dae Lim 《International journal of molecular sciences》2021,22(22)
Mulberry fruits are rich sources of anthocyanins that exhibit beneficial biological activity. These anthocyanins become instable in an aqueous media, leading to their low bioavailability. In this study, a colloidal dispersion was produced by processing mulberry samples with hot-melt extrusion. In this process, hydrophilic polymer matrices were used to disperse the compound in an aqueous media. Mulberry samples were processed with hot-melt extrusion and in the presence of an ionization agent and sodium alginate to form mulberry-extrudate solid formulations. The particle size of mulberry-extrudate solid formulations decreased, while the total phenol content, the total anthocyanin content, and solubility increased. Fourier transform infrared spectroscopy (FT-IR) revealed that mulberry-extrudate solid formulations now contained new functional groups, such as –COOH group. We investigated whether mulberry-extrudate solid formulations had a positive impact on the stability of anthocyanins. The non-extrudate mulberry sample and mulberry-extrudate solid formulations were incubated with a simulated gastric fluid system and an intestinal fluid system. The number of released anthocyanins was determined with HPLC. We found that anthocyanins were released rapidly from non-extrudate mulberry extract. Mulberry-extrudate solid formulations contained a large number of available anthocyanins even after being incubated for 180 min in the intestinal fluid system. Thus, hot-melt extrusion enhanced water solubility and stability of anthocyanins with the prolonged release. 相似文献
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采用响应面法中Box-Behnken设计对树莓果渣中总花色苷和总多酚微波辅助萃取工艺进行优化,并结合液相色谱-质谱联用技术对树莓果渣中花色苷组分进行鉴定,通过SEM观察经微波萃取和常规溶剂萃取后样品的微观结构。结果表明:微波辅助萃取树莓果渣中总花色苷和总多酚的最佳工艺参数为:萃取温度61℃、液料比30∶1(mL/g)和萃取时间5 min,在该条件下,树莓果渣总花色苷和总多酚含量分别为4.14 mg C3G/g和15.88 mgGAE/g。经微波萃取后样品细胞结构遭到严重破坏,而经传统的溶剂萃取后样品细胞结构保存完好,且微波法所得的树莓果渣总花色苷和总多酚含量明显较高。经鉴定树莓果渣中含有6种花色苷组分,分别为飞燕草素-3-葡萄糖苷、矢车菊素-3-芸香糖苷、牵牛花素-3-葡萄糖苷、芍药素-3,5-二己糖苷、芍药素-3-(6-丙二酰)-葡萄糖苷和天竺葵素-3-(6-丙二酰)-葡萄糖苷。 相似文献
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Extraction of Anthocyanins Using a Laboratory Robot and Innovative Extraction Technologies 下载免费PDF全文
Solid‐liquid extraction using a laboratory robot, where anthocyanins are leached from dried red vine leaves, is evaluated with respect to precision and accuracy. The solid handling of the robot results in standard deviations between ± 0.6 and ± 1.8 depending on the particle size. For liquid handling the standard deviations are slightly higher depending on the volatility of the solvents. The validated, fully automated natural plant extraction robot achieves varying yields based on dry matter for methanol, water, and ethanol which are improved with increasing particle size. Manually performed extraction kinetics experiments are compared with the robot. With respect to process intensification, a comparison of yields obtained by microwave‐ and ultrasonic‐supported extraction compared to laboratory robot shaking and stirred single‐stage batch experiments was performed. 相似文献
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采用响应面法中Box-Behnken设计对树莓果渣中总花色苷和总多酚微波辅助萃取工艺进行优化,并结合液相色谱-质谱联用技术对树莓果渣中花色苷组分进行鉴定,通过SEM观察经微波萃取和常规溶剂萃取后样品的微观结构。结果表明,微波辅助萃取树莓果渣中总花色苷和总多酚的最佳工艺参数为:萃取温度61 ℃、液料比30:1 mL/g和萃取时间5 min,在此条件下,树莓果渣总花色苷和总多酚含量分别为4.20 mg C3G/g和16.05 mg GAE/g。经微波萃取后样品细胞结构遭到严重破坏,而经传统的溶剂萃取后样品细胞结构保存完好,且微波法所得的树莓果渣总花色苷和总多酚含量明显较高。经鉴定树莓果渣中含有6种花色苷组分,分别为飞燕草素-3-葡萄糖苷、矢车菊素-3-芸香糖苷、牵牛花素-3-葡萄糖苷、芍药素-3.5-二己糖苷、芍药素-3-(6-丙二酰)-葡萄糖苷和天竺葵素-3-(6-丙二酰)-葡萄糖苷。 相似文献
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