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变径毛细管柱GC/FTIR联用技术的研究 总被引:1,自引:0,他引:1
本文介绍了使用新型变径毛细管柱的气相色谱/傅里叶变换红外光谱联用技术(GC/FTIR)。以正构烷烃的混合物为样品,研究了载气速流、色谱进样量及柱后死体积对联用效果的影响。分别在变径毛细管柱GC/FTIR和普通毛细管柱GC/FTIR联用系统上分析了烷烃芳烃混合物和合成汽油样品,并利用软件系统提供的程序和红外标准谱库对所得光谱进行了检索。实验结果表明,变径毛细管柱GC/FTIR系统具有色谱进样量大,可鉴定组分多,分离能力强和检测灵敏度高等显著优点。 相似文献
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毛细管气相色谱用固定液的进展 总被引:4,自引:2,他引:2
一、前言 自从1979年弹性石英毛细管柱问世之后.毛细管气相色谱得到了迅速的发展。以毛细管柱代替填充柱的趋势日益明显.特别是1983年大内径厚液膜毛细管柱的发展和应用使这种趋势更加肯定了。当然目前在国内填充柱气相色谱仍在例行分析中占主导地位,但是随着毛细管色谱技术在国内的进一步发展,填充柱会逐步地被毛细管柱所取代。 相似文献
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电色谱整体柱是通过原位聚合或固化于柱管内部的方法来制备的一种新型色谱柱.与常规的填充毛细管柱不同的是,其制备方法具有简易性和易于实现色谱填料表面化学性质多样性的特点,已迅速成为优异的毛细管电色谱固定相形式.本文综述了毛细管电色谱整体柱研究的最新进展. 相似文献
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《分析测试技术与仪器》2014,(3)
正中国科学院兰州化学物理研究所色谱中心是我国从事色谱柱研发和生产历史最长、规模最大、实力雄厚的单位。60年代初就开始铜毛细管色谱柱的研究;70年代初进行玻璃毛细管柱的研究,研制和推广了独特的"有机胶法制备高效玻璃SCOT柱"的方法:80年代又进行了石英毛细管柱的研究及应用推广,获得全国科学大会奖及中国科学院科技进步二等奖;并被国家机械工业部列为"推广代替进口产品"。本中心率先将大口径毛细管柱应用于工业流程色谱,并适应国内实际应用的需要,相继成功地研制出一系列深受广大用户青睐 相似文献
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《分析测试技术与仪器》2014,(4)
正中国科学院兰州化学物理研究所色谱中心是我国从事色谱柱研发和生产历史最长、规模最大、实力雄厚的单位。60年代初就开始铜毛细管色谱柱的研究;70年代初进行玻璃毛细管柱的研究,研制和推广了独特的"有机胶法制备高效玻璃SCOT柱"的方法;80年代又进行了石英毛细管柱的研究及应用推广,获得全国科学大会奖及中国科学院科技进步二等奖;并被国家机械工业部列为"推广代替进口产品"。本中心率先将大口径毛细管柱应用于工业流程色谱,并适应国内实际应用的需要,相继成功地研制出一系列深受广大用户青睐 相似文献
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气相色谱近年的发展 总被引:1,自引:0,他引:1
简要阐述了近几年气相色谱(GC)的发展和特点。GC是一个成熟的技术,广泛地应用于各个领域,近几年GC的发展除了继续研究新的固定相和高性能的毛细管色谱柱之外,主要在全二维气相色谱(GC×GC)、快速GC、便携式GC仪和微型GC仪几个方面。近几年新研究的GC固定相主要集中在常温离子液体和各种环糊精的衍生物。现在GC研究者趋向于使用商品化的GC毛细管柱,而商品化的GC毛细管柱应用最多的是以含5%苯基的聚甲基硅氧烷为固定相的色谱柱。GC×GC发展迅猛,特别是关于调制器的研究,已开发出十多种调制模式,并广泛地应用于各个领域。为了适应大量样品的分析和现场分析,研究和开发了多种快速GC方法和仪器以及便携式GC仪。为了仪器的小型化和专属性检测,μGC仪的研究也稳步地发展起来。 相似文献
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P. Sandra F. David M. Proot G. Diricks M. Verstappe M. Verzele 《Journal of separation science》1985,8(11):782-798
The selection of stationary phases in capillary gas chromatography is discussed. Methyl silicone, phenyl methyl silicone, trifluoropropylmethyl silicone, biscyanopropyl silicone, and high molecular weight (HMW) polyethylene glycol are considered to be the basic phases. Selectivities and polarities between these phases are obtained by selectivity tuning. Selectivity tuning can be performed in three different ways, namely by synthesizing a tuned stationary phase, by mixing the basic phases, or by coupling capillary columns of different selectivities. In coupling capillary columns the variables are column length, β-value, temperature, and/or pressure. 相似文献
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Kateřina Plachká Veronika Pilařová Ondřej Horáček Taťána Gazárková Hana Kočová Vlčková Radim Kučera Lucie Nováková 《Journal of separation science》2023,46(18):2300431
Within this review, we thoroughly explored supercritical fluid chromatography (SFC) columns used across > 3000 papers published from the first study carried out under SFC conditions in 1962 to the end of 2022. We focused on the open tubular capillary, packed capillary, and packed columns, their chemistries, dimensions, and trends in used stationary phases with correlation to their specific interactions, advantages, drawbacks, used instrumentation, and application field. Since the 1990s, packed columns with liquid chromatography and SFC-dedicated stationary phases for chiral and achiral separation are predominantly used. These stationary phases are based on silica support modified with a wide range of chemical moieties. Moreover, numerous unconventional stationary phases were evaluated, including porous graphitic carbon, titania, zirconia, alumina, liquid crystals, and ionic liquids. The applications of unconventional stationary phases are described in detail as they bring essential findings required for further development of the supercritical fluid chromatography technique. 相似文献
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Liquid-crystalline stationary phases for gas chromatography 总被引:1,自引:0,他引:1
Physico-chemical properties of new liquid-crystalline stationary phases (LCSPs) for gas chromatography are reviewed. The mechanism of chromatographic separation on liquid-crystalline stationary phases is discussed and examples of analyses of complex mixtures of organic compounds using capillary and packed columns are given. 相似文献
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Summary The synthesis of methylphenylpolysiloxane polymers and their use in the preparation of crosslinked, non-extractable stationary phases for fused-silica capillary columns are described. By preparing more viscous phenyl-containing polymers than are commercially available, stationary phase films of these polymers could be efficiently coated on fused-silica capillary columns and stabilized by a free radical crosslinking mechanism using peroxides. Four methylphenylpolysiloxane polymers containing different phenyl concentrations were prepared. These included three polymers containing 50% phenyl and one polymer containing 70% phenyl. Two of the 50% phenyl polymers had one phenyl and one methyl group attached to each silicon atom. One of these also had 1% vinyl incorporated. The third 50% phenyl polymer was synthesized in such a way that one half of the silicon atoms had two phenyl groups attached while the rest contained dimethyl groups. The 70% phenyl polymer also had 4% vinyl incorporated. Due to the intrinsic thermal stability of these phenyl phases and the enhanced film stability achieved by crosslinking, the 70% phenyl phase could be utilized up to 400 °C. Using the methods described in this paper, highly efficient and thermally stable fused silica capillary columns coated with crosslinked methylphenylpolysiloxane stationary phases can be successfully prepared. 相似文献
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<正>The present study describes guanidinium-based ionic liquids(GBILs) as stationary phases for capillary gas chromatography (CGC) and to the best of our knowledge,no related reports are available up to now.In this study,a hexaalkylguanidinium ionic liquid(DOTMG-NTf_2) was synthesized and coated statically onto capillary columns.Selectivity of the stationary phase was evaluated by separating Grob test mixture,test mixture,alcohols mixture,and fatty acid methyl esters mixture,and thermal stability was investigated as well.The present study demonstrates that GBILs as CGC stationary phases exhibit satisfactory selectivity and thermal stability and have a great potential as new candidates for CGC stationary phases. 相似文献
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采用涂布手性固定相的毛细管柱在气相色谱上进行手性化合物对映体的分离是近年发展起来的一种简便、快速分析的新方法。本文就分离机理,手性化合物的衍生化,构型分析和光学活性固定相等四个方面的新进展进行综述和讨论。 相似文献
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整体柱离子色谱的研究进展 总被引:1,自引:0,他引:1
该文介绍了离子色谱的分类,整体柱的分类、制备及特点,并以此为依据归纳总结了常规整体柱在离子色谱中的应用和毛细管整体柱在毛细管离子色谱中的应用,其中包括硅胶基质整体柱和聚合物基质整体柱,评述并展望了整体柱离子色谱的发展前景. 相似文献
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A new mixed crosslinking agent composed of dicumyl peroxide and tetra(methylvinyl)cyclotetrasiloxane was used to prepare fused silica capillary columns with in situ crosslinked stationary phases including PEG-20M, SE-54, and OV-1. These columns proved to have good thermostability and inertness. As examples of potential applications a mixture of isomers of nitrotoluene and dinitrotoluene, and pyrolyzates of polystyrene were separated by using these columns. 相似文献