IFP Énergies nouvelles, Rond-point de l'échangeur de Solaize, BP 3, 69360 Solaize, France.
J Chromatogr A. 2012 Mar 16;1229:298-301. doi: 10.1016/j.chroma.2012.01.030. Epub 2012 Jan 18.
Overcoming high-temperature (HT) two-dimensional gas chromatography (GC × GC) limits is critical for the analysis of heavy hydrocarbons, particularly those contained in heavy petroleum fractions. To reach this goal, HT-GC × GC analysis was adapted from HT-GC Simulated Distillation (HT-GC SimDist) operating conditions as this analysis embraces compounds whose boiling point ranges from 35 °C to 700 °C and from a previous study that enabled the elution of linear alkane nC(60) and tetraaromatic compounds by HT-GC × GC. This paper shows that HT-GC × GC analysis using CO(2) cryogenic modulator and short wide bore columns with a thin film of stationary phase allows the elution of linear alkanes up to nC(68) (641 °C) as well as of highly aromatic hydrocarbons like coronene. Furthermore, compared to previous studies, an on-column injector was used to reduce discrimination of high boiling point compounds.
克服高温（HT）二维气相色谱（GC×GC）的限制对于重质烃类，特别是重质石油馏分中所含重质烃类的分析至关重要。为了达到这一目标，HT-GC×GC 分析是从 HT-GC 模拟蒸馏（HT-GC SimDist）操作条件中改编而来的，因为这种分析包含沸点范围从 35°C 到 700°C 的化合物，并且从先前的研究中可以看出，通过 HT-GC×GC 可以洗脱线性烷烃 nC（60）和四环芳烃化合物。本文表明，使用 CO（2）低温调制器和短宽径柱以及薄的固定相薄膜进行 HT-GC×GC 分析，可以洗脱直至 nC（68）（641°C）的线性烷烃，以及类似蒄的高度芳烃化合物。此外，与以前的研究相比，使用柱上进样器减少了对高沸点化合物的歧视。
