Vendeuvre Colombe, Bertoncini Fabrice, Espinat Didier, Thiébaut Didier, Hennion Marie-Claire
Direction Physique et Analyse, Institut Français du Pêtrole, BP3, 69390 Vernaison, France.
J Chromatogr A. 2005 Oct 7;1090(1-2):116-25. doi: 10.1016/j.chroma.2005.06.087.
A multidimensional method providing the composition of a heavy naphtha in paraffins, isoparaffins, olefins, naphthenes, and aromatics (PIONA) in the C8-C14 range is presented. The analytical set-up consists in a silver modified silica olefin trap on-line coupled to comprehensive two-dimensional gas chromatography (GC x GC). In this configuration, hydrocarbons are separated, in gaseous state, in two fractions, saturate and unsaturate, each fraction being subsequently analysed by GC or by GC x GC. The resolution between saturates and olefins was found to be improved compared to a single GC x GC run. The characterisation of the olefin trap highlights the benefits and the limits related to the use of that stationary phase as a double bond selective fractionation medium.
提出了一种多维方法，用于测定碳数范围为C8 - C14的重石脑油中石蜡、异石蜡、烯烃、环烷烃和芳烃（PIONA）的组成。分析装置包括一个银改性硅胶烯烃捕集阱，该捕集阱在线连接到全二维气相色谱（GC×GC）。在此配置下，烃类以气态分离为两个馏分，即饱和馏分和不饱和馏分，每个馏分随后通过气相色谱或全二维气相色谱进行分析。与单次全二维气相色谱运行相比，饱和烃和烯烃之间的分离度有所提高。烯烃捕集阱的表征突出了使用该固定相作为双键选择性分馏介质的优点和局限性。
