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麦胚中天然维生素E的SFE—CO2最佳提取工艺的研究 总被引:14,自引:1,他引:13
本研究以小麦胚芽为原料,利用超临界流体萃取技术从麦胚中提取天然维生素E。将萃取压力、萃取温度和CO2流量作为中心组合旋转设计的变量,进行响应曲面分析,确定了其最佳工艺参数和条件。结果表明:麦胚中天然维生素E的超临界CO2的取的最佳工艺参数为萃取压力为29.1MPa,萃取温度为316K,CO2流量为2ml/min。 相似文献
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不同萃取条件对麦胚中天然维生素E的SFE—CO2提取的影响 总被引:5,自引:0,他引:5
研究以小麦胚芽为试验材料,利用超临界流体萃取技术从麦胚中提取了天然维生素E。结果表明:麦胚中天然维生素E的超临界CO2适宜萃取条件为萃取压力28 ̄35MPa、萃取温度40 ̄45℃,CO2流量2mL/min,萃取时间90min。 相似文献
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微波稳定化处理小麦胚为原料,研究影响超临界CO2萃取小麦胚芽油的因素,并利用有影响贡献的因素优化了超临界CO2萃取小麦胚芽油的工艺。选取小麦胚粉碎颗粒目数、麦胚水分含量、萃取压力、萃取温度、萃取剂流量和萃取时间为试验影响因素,利用Plackett-Burman进行试验设计,筛选影响超临界CO2萃取小麦胚芽油的因素。根据筛选出的因素,利用Box-Behnken进行响应曲面优化水平组合试验。结果显示,因素影响从大到小依次为萃取剂流量萃取压力和萃取时间萃取温度麦胚目数,而3.3%~4.7%样本水分对萃取影响极小;响应面分析试验得到小麦胚芽油萃取率回归方程,方程达到极显著水平,拟和很好。超临界CO2萃取小麦胚芽油最佳工艺参数:麦胚目数为60目、萃取剂流量为30 L/h、萃取压力为25 MPa、萃取时间为141 min和萃取温度40℃。在此条件下小麦胚芽油萃取率达到82.79%。 相似文献
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采用超临界CO2流体萃取技术提取花生油.通过单因素实验及正交实验研究了萃取压力、萃取温度、CO2流量和萃取时间等因素对油脂萃取率的影响,确定了超临界CO2流体萃取技术提取花生油的最佳工艺条件.结果表明,在实验范围内各影响因素对花生油萃取率作用的大小顺序依次为:萃取压力>萃取温度>CO2流量>萃取时间.超临界CO2流体萃取技术提取花生油的最佳工艺参数为:萃取压力25MPa,萃取温度45℃,CO2流量18kg/h,萃取时间150min,在该工艺条件下花生油萃取率达到49.87%. 相似文献
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花生壳中木犀草素的超临界CO2萃取工艺研究 总被引:1,自引:0,他引:1
目的:研究超临界CO2萃取花生壳中木犀草素的最佳工艺条件。方法:采用HPLC法测定木犀草素含量,以提取率为指标,应用单因素和正交实验,分别考察萃取温度、萃取压力、分离温度、分离压力以及CO2流量等5个因素影响,并将筛选工艺与目前文献的乙醇提工艺进行对比分析。结果:超临界CO2萃取木犀草素的最佳工艺条件:萃取温度为50℃,萃取压力为35MPa,分离温度为30℃,分离压力为10MPa,CO2流量为7L/h。结论:与传统乙醇提取工艺相比,超临界CO2萃取工艺提取花生壳中木犀草素的提取率提高了2.63倍。 相似文献
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Optimization of the Supercritical Fluid Extraction of Natural Vitamin E from Wheat Germ Using Response Surface Methodology 总被引:1,自引:0,他引:1
ABSTRACT: Natural vitamin E was extracted by supercritical fluid extraction of carbon dioxide (SFE-CO2 ) from wheat germ. Several SFE-CO2 parameters, such as extracting pressure, extracting temperature, and flow rate of carbon dioxide were examined as the independent variables of central composite rotate design (CCRD). Through the response surface methodology (RSM), the optimal processing conditions were determined and the quadratic response surfaces were drawn from the mathematical models. The results demonstrated that the extracting pressure, temperature, pressure × temperature interaction, and flow rate of CO2 significantly affected the yield of the natural Vitamin E's extraction, while two interactions containing the flow rate of CO2 had no significant effect on the yield of natural vitamin E. The optimal processing conditions of the extraction of natural vitamin E in wheat germ by SFE-CO2 were: extracting pressure 5000 PSI, extracting temperature 316 K, and flow rate of carbon dioxide 1.7 ml/min. Optimum value predicted by RSM for the concentration of natural vitamin E was 2307 mg/100g. Close agreement between experimental and predicted values was obtained. 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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Kar Lin Nyam Chin Ping Tan Roselina Karim Oi Ming Lai Kamariah Long Yaakob B Che Man 《Food chemistry》2010
Tocopherol-enriched oil was extracted by supercritical fluid extraction of carbon dioxide (SFE-CO2) from Kalahari melon and roselle seeds. The SFE-CO2 process was optimised using response surface methodology (RSM) with central composite design (CCD). Three SFE-CO2 parameters namely extracting pressure, extracting temperature, and flow rate of carbon dioxide were examined. The optimal SFE-CO2 conditions were determined and the quadratic response surfaces were drawn from the mathematical models. The optimal SFE-CO2 conditions for the extraction tocopherol-enriched oil from Kalahari melon seeds were: extracting pressure 290 bar, extracting temperature 58 °C, and flow rate of carbon dioxide 20 ml/min. The optimum conditions for roselle seeds were extracting pressure 200 bar, extracting temperature 80 °C, and flow rate of carbon dioxide 20 ml/min. These optimum conditions yielded tocopherol concentration of 274.74 and 89.75 mg/100 g oil from Kalahari seed and roselle seed, respectively. No significant (P > 0.05) differences were obtained between the experimental and predicted values. 相似文献
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猕猴桃籽油的超临界二氧化碳萃取研究 总被引:22,自引:3,他引:22
本文根据超临界流体萃取技术的基本原理,以猕猴桃籽为原料,采用单因素试验的方法,考察了原料粉碎度、投料量、萃取压力、萃取温度、CO2流量、时间、分离温度等对超临界CO2萃取的影响。气相色谱分析了猕猴桃籽油的组成,α-亚麻酸含量高达60.71%,根据国家标准方法分析了猕猴桃籽油的品质,证明优于溶剂法提取得到的猕猴桃籽油。 相似文献