岩石氯仿抽提物及原油中异构烷烃和环烷烃的分析

A NEW METHOD OF ANALYSING ISOMERIC AND CYCLIC ALKANES IN OIL AND EXTRACTED BITUMEN FROM SOURCE ROCKS

本文应用毛细管气相色谱分离分析技术,利用色谱仪进样器填充有5(?)分子筛的石英内衬管作为分离管,来实现岩样和原油中微量的异构烷烃和环烷烃与大量共存的正构烷烃的分离,获取能完整地展示其中异构烷烃、环烷烃全貌的色谱图。此法简单可靠,具有样品失真小、耗损小、分析灵敏度和准确度高、分析速度快的特点,对微量样品的测定也能得到满意的结果。

Methods of analysing isomeric and cyclic alkanes in oil and extracted bitumen from source rocks are still in an immatured state.Analysis of more abundant pristane and phytane or isoprenoid alkane is common by corried out at present in geochemical study,This paper presents a modern separating technique of using a capillary gas chromatography to realize the separation of traces of isomeric alkane and cycloalkane from a great deal of coexisting n -alkane in rock samples or in oils,as a result of obtaining the chromatograms in which the characteristics of isomeric alkane and cycloalkane can be entirely shown.A separating tube With quartz lining,filled with a molecular sieve 5(?),in the sampler of the chromatography is used in the method,It is si- mple and reliable and with a characteristic of low distortion and losses of sa- mples,high analystic accuracy and fast rate,A satisfactory result of dete- cting trace content in samples can be also obtained.