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本文采用超声-溶剂法提取蒿籽油,通过单因素试验和正交试验,探讨了超声功率、超声温度、超声时间、浸提温度、浸提时间和溶剂固液比对蒿籽出油率的影响,研究结果表明,粉碎度40目、固液比1∶4、超声功率50W、超声温度50℃、超声时间30min、浸提温度50℃、浸提时间3h,此条件下蒿籽的出油率为4.23g,出油率21.1%,提取率为91.0%.通过与溶剂提取法对比,证明超声是一种可靠、高效的提取蒿籽油的方法. 相似文献
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本文采用超声-溶剂法提取蒿籽油,通过单因素试验和正交试验,探讨了超声功率、超声温度、超声时间、浸提温度、浸提时间和溶剂固液比对蒿籽出油率的影响,研究结果表明,粉碎度40目、固液比1:4、超声功率50W、超声温度50℃、超声时间30min、浸提温度50℃、浸提时间3h,此条件下蒿籽的出油率为4.23g,出油率21.1%,提取率为91.0%。通过与溶剂提取法对比,证明超声是一种可靠、高效的提取蒿籽油的方法。 相似文献
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脱脂小麦胚芽为原料,筛选影响固定化酶制备麦胚蛋白工艺的重要影响因子,并利用贡献大的影响因子优化固定化酶制备麦胚蛋白工艺。选取麦胚目数、料液比、浸提温度、浸提时间、麦胚乳pH值、酶水解温度和酶水解时间为实验影响因子,利用Plackett-Burman试验设计,筛选出有显著贡献的影响因子。依据筛选因子,利用Box-Behnken进行响应曲面优化试验。结果显示,主要影响因子从大到小依次为:麦胚乳的pH值>酶水解温度>料液比;响应面分析试验得到麦胚蛋白得率回归方程,方程达到极显著水平,拟和很好。固定化酶制备麦胚蛋白优化工艺参数:料液比为1∶7.8、麦胚乳pH值为5.0和酶水解温度为58.5℃。在此条件下,麦胚蛋白质得率达到80.11%。 相似文献
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响应面法优化小麦胚芽总黄酮的提取工艺 总被引:1,自引:0,他引:1
《中国食品添加剂》2017,(6)
以小麦胚芽为原料,研究了以乙醇为溶剂,提取麦胚中黄酮类物质的工艺条件。在单因素基础上应用响应面法优化小麦胚芽中黄酮类物质提取的工艺参数,适宜工艺条件为:液料比25∶1,提取时间为3.1h,提取温度52℃,麦胚中黄酮类物质的提取量为34.50mg/g,与预测值35.56mg/g的相对误差小于1%,表明优化得到的回归模型具有良好的预测性。 相似文献
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以黑莓籽为原料,采用索氏法提取黑莓籽油。考察了溶剂性质、粉碎度、提取温度、提取时间及料液比对黑莓籽油出油率的影响。通过正交实验设计优化索氏法提取黑莓籽油的最佳工艺条件为:以石油醚为提取剂,黑莓籽粉碎过80目筛,提取时间2h,温度为90℃,料液比1:15(g:mL),在此条件下实验测得黑莓籽油平均出油率为22.855%。 相似文献
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Nurhan Turgut Dunford Minquan Zhang 《Food research international (Ottawa, Ont.)》2003,36(9-10):905-909
This study examined the pressurized solvent extraction of wheat germ oil. The effects of temperature (45–135 °C at 1500 psi), extraction time, sample size and solvent type on the extraction efficiency and oil quality were studied. Extraction efficiency of the normal-hexane was compared to that of the iso- and high purity-hexane, iso-propanol, ethanol and acetone. The extracts were analyzed for n-3 and n-6 polyunsaturated fatty acid content. Pressurized solvent extraction reduced extraction time significantly as compared to Soxhlet extraction. The time required for complete oil recovery was dependent on the amount of wheat germ used for extraction. The amount of extract collected was highest when ethanol was used as a solvent for pressurized solvent extraction. Soxhlet and pressurized solvent extractions resulted in similar oil yields when hexane was used as a solvent. Fatty acid composition of the extracts was not affected by either temperature or extraction method. The experimental results indicate that a pressurized solvent extraction technique reduces solvent consumption and extraction time with no adverse effect on the extraction yield and fatty acid composition of the oil. 相似文献
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研究了混合溶剂浸提富含黄酮、VE的麦胚油。对正己烷、正己烷/乙酸乙酯、正己烷/正丁醇、正己烷/丙酮、甲醇/丙酮、异丙醇/1,2-二氯乙烷6种浸出溶剂进行筛选,发现正己烷/丙酮浸出效果较理想。兼顾提油效率、所提麦胚油的VE含量和黄酮含量,采用单因素实验和正交实验得出正己烷/丙酮浸出麦胚油的理想工艺条件为:浸出温度45℃,浸出溶剂滴速5.5 mL/min(原料100g),浸出时间45 min。该条件下,脱脂麦胚残油率0.354%,麦胚油VE含量3.794 9 g/kg,黄酮含量10.29 g/kg。 相似文献
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Study of Optimal Extraction Conditions for Achieving High Yield and Antioxidant Activity of Tomato Seed Oil 总被引:1,自引:0,他引:1
Value of tomato seed has not been fully recognized. The objectives of this research were to establish suitable processing conditions for extracting oil from tomato seed by using solvent, determine the impact of processing conditions on yield and antioxidant activity of extracted oil, and elucidate kinetics of the oil extraction process. Four processing parameters, including time, temperature, solvent-to-solid ratio and particle size were studied. A second order model was established to describe the oil extraction process. Based on the results, increasing temperature, solvent-to-solid ratio, and extraction time increased oil yield. In contrast, larger particle size reduced the oil yield. The recommended oil extraction conditions were 8 min of extraction time at temperature of 25 °C, solvent-to-solids ratio of 5/1 (v/w) and particle size of 0.38 mm, which gave oil yield of 20.32% with recovery rate of 78.56%. The DPPH scavenging activity of extracted oil was not significantly affected by the extraction parameters. The inhibitory concentration (IC(50) ) of tomato seed oil was 8.67 mg/mL which was notably low compared to most vegetable oils. A 2nd order model successfully described the kinetics of tomato oil extraction process and parameters of extraction kinetics including initial extraction rate (h), equilibrium concentration of oil (C(s) ), and the extraction rate constant (k) could be precisely predicted with R(2) of at least 0.957. Practical Application: The study revealed that tomato seed which is typically treated as a low value byproduct of tomato processing has great potential in producing oil with high antioxidant capability. The impact of processing conditions including time, temperature, solvent-to-solid ratio and particle size on yield, and antioxidant activity of extracted tomato seed oil are reported. Optimal conditions and models which describe the extraction process are recommended. The information is vital for determining the extraction processing conditions for industrial production of high quality tomato seed oil. 相似文献
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采用溶剂浸出法从米糠中提取油脂,以提油率为指标,对不同工艺条件下稻米油提取过程进行动力学分析,研究溶剂、料液比、提取温度以及辅助处理方法对米糠提油率的影响。结果表明:稻米油提取过程符合菲克第二定律,且该动力学方程能较为准确地模拟溶剂法提取稻米油的过程;提取条件不同时,提油率及提取速率差异较明显。相比无水乙醇和正己烷,异丙醇作为提取溶剂时,米糠总提油率Me和传质系数k均较高。适当地增加溶剂用量、提高提取温度以及动态处理均有助于提高总提油率和传质系数。动态处理增大了油脂扩散的传质驱动力,以异丙醇为溶剂,在提取温度为50 ℃、料液比为1∶7.5、动态处理的条件下,米糠提油率达到90.12%,比静态处理提高了0.54 倍,最大有效扩散系数达到5.172 6×10―12 m2/s。 相似文献
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目的 优化葵花籽过氧化值和酸价检测的油脂制备工艺。方法 借助超声优化油脂制备工艺,以油脂得率为评价指标,在单因素实验的基础上,采用Plackett-Burman设计和Box-Behnken Design响应面法对影响因素进行优化,然后用优化后工艺与国标法对6种葵花籽进行油脂提取并比较分析其油脂得率、过氧化值和酸价,评价优化方法可行性。结果 优化的超声最佳提取工艺为粉碎目数70目、料液比1:4 (g:mL)、浸提时间2h、超声功率312 W、超声时间37 min,经验证此优化工艺提取的油脂得率比国标法提高19%~25%,油脂制备时间由12h以上缩短至2.5h,缩短了80%的制备时间,提取效率更高,且测得的过氧化值结果更低。结论 优化的超声工艺提取油脂更多且耗时短,不仅满足了检测用油量的需求,还降低了长时间油脂提取的氧化风险,检测结果更准确,更能真实反映葵花籽的品质,经验证此方法准确可行,可用于葵花籽过氧化值和酸价检测的油脂提取制备。 相似文献