Panda Saroj K, Schrader Wolfgang, Andersson Jan T
Institute of Inorganic and Analytical Chemistry, University of Münster, Corrensstrasse 30, 48149 Münster, Germany.
J Chromatogr A. 2006 Jul 28;1122(1-2):88-96. doi: 10.1016/j.chroma.2006.04.026. Epub 2006 May 6.
The separation of highly alkylated polycyclic aromatic compounds according to the size of their aromatic system is investigated using the polycyclic aromatic sulfur heterocycles in vacuum gas oil. A large number of reference compounds containing several parent ring systems and different alkylation patterns were first investigated to characterize the retention of polycyclic aromatic compounds likely to occur in high-boiling petroleum samples. A beta-cyclodextrin phase, Merck ChiraDex, was found to be more suitable than chemically bonded aminopropanosilane and tetrachlorophthalimide in normal-phase HPLC with respect to a combination of selectivity towards the number of aromatic double bonds and degree of influence of the alkyl groups of the aromatic compounds. Finally the preseparated polycyclic aromatic sulfur heterocycles from a vacuum gas oil were fractionated according to the number of condensed aromatic rings on the ChiraDex phase and were characterized by Fourier transform ion cyclotron resonance mass spectrometry.
利用减压瓦斯油中的多环芳香硫杂环化合物，研究了高度烷基化多环芳香化合物根据其芳香体系大小的分离情况。首先研究了大量含有多个母环体系和不同烷基化模式的参考化合物，以表征可能存在于高沸点石油样品中的多环芳香化合物的保留情况。对于芳香双键数量的选择性和芳香化合物烷基基团的影响程度的组合，发现在正相高效液相色谱中，默克手性环糊精β-环糊精相比化学键合的氨基丙硅烷和四氯邻苯二甲酰亚胺更合适。最后，从减压瓦斯油中预分离出的多环芳香硫杂环化合物在ChiraDex相上根据稠合芳香环的数量进行分馏，并通过傅里叶变换离子回旋共振质谱进行表征。
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