Systematically structural identification of nitric compounds in crude oil with chemometric resolution

来源期刊：中南大学学报(英文版)2005年第3期

论文作者：黄熠 张泰铭 梁逸曾 崔卉

文章页码：300 - 305

Key words：column chromatography; chromatography-mass spectrometry; chemometric resolution; structural identification; non-hydrocarbon compound; crude oil; nitric

Abstract: Aimed at the problem of classification of non-hydrocarbons of crude oil, the theoretical standpoint that the polarity of a compound depends on the whole structure and composition of molecule instead of a kind of heteroatom or its functional group was presented. A method was established for the systematically structural identification of nitric compounds in crude oil. The pre-fractionation of a crude oil sample into 7 fractions was performed by diadsorption column chromatography with neutral aluminum oxide and silica gel. Subsequently, the individual compo- nents were obtained by using capillary column gas chromatography, and the types of compounds were detected by a mass spectrometer. In combination with a chemometric resolution, the compounds of fraction were further identified. This method can relieve the difficulty of classical analysis in identifying those species with very low contents or without being completely separated. The structures of 168 nitric compounds in a crude oil sample were determined by this method.