超临界流体色谱法测定固体在二氧化碳中的溶解度

开发了一种测定超临界二氧化碳中大分子溶质的溶解度的方法。这一方法将微型超微界流体萃取直接与超临界色谱相耦合，超临界流体色谱采用ＦＩＤ作为检测器。实验中两者具有同一压力、温度及同样的ＣＯ２流速度。     

超临界流体制备生物柴油研究进展

生物柴油是一种环境友好的绿色能源。目前国内外的制备方法主要有酸催化法、碱催化法、生物酶催化法以及超临界流体法。文章主要阐述了各种超临界法制备生物柴油的国内外研究最新进展,介绍了其反应机理及反应动力学,并与传统的方法做了比较,指出其优点在于无需使用催化剂、反应速度快、提纯分离过程简单、对环境友好、无污染等。     

超临界流体技术制备生物柴油的研究进展

综述了超临界流体技术制备生物柴油的最新研究进展。介绍了反应机理和反应动力学、工艺操作条件、原料中的水和游离脂肪酸、共溶剂和附加催化剂对酯交换反应的影响,并提出了超临界流体技术的优势、存在问题以及发展方向。     

超临界流体技术制备生物柴油

制备生物柴油的超临界流体技术是使用动、植物油脂与超临界甲醇反应生产脂肪酸甲酯的新工艺.与传统的催化反应技术相比,超临界技术生产生物柴油的反应时间由1～8 h缩短至3～4min,而且反应不需催化剂,简化了产品提纯过程,提高了酯交换反应后脂肪酸甲酯的产率,并对环境友好.     

超临界流体制备生物柴油的研究进展

着重论述了国内外超临界流体在制备生物柴油方面的研究进展.制备生物柴油的超临界流体技术是利用动植物油脂与超临界流体反应生产脂肪酸甲酯的新工艺.与传统的催化反应技术相比,超临界流体生产技术具有时间短,提纯过程简单,脂肪酸甲酯产率高,对环境友好无污染等特点.     

超临界流体色谱法及其应用

介绍了超临流体色谱法的技术特点和应用，并与气相谱法和液相色谱法进行了比较。     

超临界流体的应用现状

超临界流体技术是近年来发展迅速的一项新技术,有着广泛的应用前景。本文综述了其在分离、分析及材料制造方面的应用现状。     

超高效液相色谱法测定柴油中多环芳烃含量

利用超高效液相色谱法测定柴油中多环芳烃含量.采用Acquity UPLC BEH Phenyl C18柱分离甲醇溶解固相萃取后的溶液,采用外标法的定性定量分析,得到荧光检测器的测定结果.设置乙腈用量为0.1mL、解吸液流速为0.128mL·min-1、样品溶液流速为0.15mL·min-1、选择0.02mol·L-1的...     

超临界流体的应用与研究进展

综述了超临界流体的基础理论研究及其在分离提纯、材料制备、化学反应、环境保护和分析化学等方面的应用。     

Supercritical Fluid Chromatography of Polycyclic Aromatic Compounds: A Review

An overview of supercritical fluid chromatography as a method of analysing complex mixtures of polycyclic aromatic compounds is given.     

Supercritical Fluid Extraction and Chromatography of Lipids in Bilberry

A supercritical fluid extraction (SFE) method has been developed for the extraction of lipids in bilberry. Experimental design was used to optimize pressure, temperature and extraction time using CO₂ as solvent. Best SFE condition for total lipids was 450 bar, 60 °C and 45 min. The SFE method was compared to conventional Bligh & Dyer (B&D) extraction. The amount of fatty acid methyl esters (FAME) was found to be 4.84 ± 0.06 mg and 4.564 ± 0.003 mg per g of the freeze‐dried bilberry sample for the developed SFE and B&D methods, respectively, while the amount of total lipids was found to be 54.40 ± 6.06 mg and 65.70 ± 0.67 mg per g of sample for SFE and B&D, respectively. This discrepancy between FAME and total lipids could be explained by the presence of wax esters, sterol esters, carotenoids and phospholipids, as determined by supercritical fluid chromatography.     

Lipidomics by Supercritical Fluid Chromatography

This review enlightens the role of supercritical fluid chromatography (SFC) in the field of lipid analysis. SFC has been popular in the late 1980s and 1990s before almost disappearing due to the commercial success of liquid chromatography (LC). It is only 20 years later that a regain of interest appeared when new commercial instruments were introduced. As SFC is fully compatible with the injection of extracts in pure organic solvent, this technique is perfectly suitable for lipid analysis and can be coupled with either highly universal (UV or evaporative light scattering) or highly specific (mass spectrometry) detection methods. A short history of the use of supercritical fluids as mobile phase for the separation oflipids will be introduced first. Then, the advantages and drawbacks of SFC are discussed for each class of lipids (fatty acyls, glycerolipids, glycerophospholipids, sphingolipids, sterols, prenols, polyketides) defined by the LIPID MAPS consortium.     

超临界流体在环境保护中的应用和展望

超临界流体技术广泛应用于化工、医药、生物、食品、陶瓷等领域。将超临界流体技术用于环境保护则是一个新的研究方向,由于该技术对废物处理具有经济、快速、高效等特点,近几年来发展异常迅速。综述了超临界流体的特性以及超临界流体技术（超临界萃取、超临界色谱和超临界水氧化）在环境保护方面的应用现状。     

色谱法测定烷烃和芳烃在高碳烷烃中的亨利系数

用气相色谱法测定了５０－１００℃下烷烃和芳烃分别在正十六烷、正十七烷、正二十烷、正二十四烷、正三十烷中的亨利系数考虑了固定液流失量和上非理想性的校正。讨论了亨利系数Ｈ与溶质碳数和溶剂碳数之间的关系。结果证明：亨利系数随着溶碳数和溶剂碳数的增加而减少。     

A Practical Method for Analysis of Triacylglycerol Isomers Using Supercritical Fluid Chromatography

Triacylglycerol (TAG) isomers have been reported to have differing physical and nutritional properties. The analysis of TAG isomers is therefore important for understanding the physical properties of lipids as well as their digestion and absorption. However, methods for the quantitative analysis of TAG regioisomers and enantiomers in vegetable oils and biological samples are still under development. Recently, methods using recycle high-performance liquid chromatography (HPLC) and silver ion column-HPLC have been reported. However the recycle HPLC method requires more than 1 hour, in general, for each sample that is analyzed. Furthermore, existing methods are unable to quantify regioisomers and enantiomers simultaneously. Thus, we aimed to develop a practical method to simultaneously quantify regioisomers and enantiomers of TAG. Three isomers of sn-POO, OPO, and OOP were separated by supercritical fluid chromatography coupled with triple quadrupole mass spectrometer (SFC/MS/MS) using a CHIRALPAK^® IG-U column with acetonitrile and methanol as mobile phase. The separation was completed in 40 min, which is a shorter run time than the conventional techniques published to date. Linear calibration curves with standards were obtained and used to quantify sn-OPO, sn-POO, and sn-OOP in extra virgin olive oil, refined olive oil, palm oil, palm olein, and interesterified palm olein.     

气相色谱法测定芳烃组成

本文章建立了以HP7890A气相色谱仪及HP-INNOWAX毛细管柱快速分析芳烃类样品组成的方法,对同一样品测定的相对标准偏差为3.87％.此方法准确性好,精密度高,分析速度快,操作简便,适用于日常分析工作.     

超临界流体萃取植物精油的研究

超临界萃取技术是一种新兴的分离技术,本文论述了超临界流体萃取技术的重要性,对超临界流体萃取技术在植物精油提取方面的最新应用研究进行了总结,对植物精油超临界萃取的数学建模进行了综述,其中包括两相模型、多组分多孔球解吸附-溶解-扩散(DDD)模型、微分质量守恒模型等,并对各个模型的萃取机理和模型的求解方法进行了分析和论述。     

超临界流体色谱手性分离布洛芬

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.     

超临界流体在化工生产中的应用

介绍了超临界流体的性质,说明在其在萃取和化学反应中的应用。