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超临界流体萃取技术的应用及研究进展 总被引:7,自引:0,他引:7
超临界流体萃取技术近年来被广泛应用于中草药、食品、香料、化工及环境保护等领域。介绍了超临界流体萃取技术与传统的萃取方法相比所具备的优势及其发展前景。 相似文献
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超临界流体色谱在手性分离中的应用 总被引:4,自引:0,他引:4
综述了超临界流体色谱在手性分离中的应用,讨论了3类手性固定相、二元流动相、三元流动相和温度对分离的影响。对超临界流体色谱的手性分离中的应用作了展望。 相似文献
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The separation method using chiral stationary phase (CSP) for the preparation of enantioselective compound was widely used. In this work, supercritical fluid chromatography(SFC) was proposed to resolve the chiral mixtures. To determine the optimum operating conditions for the chiral separation of the racemic ibuprofen, the retention factors and resolutions with the change in pressure, temperature and the content of IPA (%, by volume) in supercritical CO2 were investigated. Experiments showed that the retention factor decreased with the increase of pressure and decrease in temperature. The retention factor was also influenced by the content of IPA in mobile phase, as the content of IPA in the supercritical fluid increased, the retention factor decreased. The resolution of the enantiomers became worse with the increase of IPA in the supercritical fluid. Through optimizing the experimental conditions, a SFC procedure with 13MPa, 311.15K and 4% IPA in CO2 was obtained. The peak shape of the enantiomers was symmetric with supercritical fluid chromatography when compared to the asymmetric peak shape obtained by the conventional liquid chromatography. This work demonstrated that the developed supercritical fluid chromatography procedure was suitable for the chiral separation of ibuprofen enantiomers. 相似文献
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将超临界流体色谱技术应用于青蒿萃取液中青蒿素的提纯。采用ZorBaxSB-C18色谱柱(9.4mm×250mmI.D.,5μm),在改性剂含量约0%~10%,CO2流速6~30g·min·1,压力10~16MPa,温度313.15~338.15K范围内考察了青蒿素的纯化效果,确定了较适宜的色谱提纯条件为:CO2流速22g·min·1,柱温313.15K,柱压11MPa;此条件下提纯青蒿提取液,得到的产品纯度为74.83%(wt)。研究了提纯过程中的保留值规律,将青蒿素的容量因子与密度和温度的关系进行了关联,计算值和实验值的平均相对偏差为6.002%,二者吻合较好。 相似文献
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