运用GC-MS对准噶尔盆地煤样及孤岛稠油样中的饱和烃生物标志化合物进行分析,首次检测到了丰富的无环类异戊二烯烷烃类化合物:iC18(2,6,10-三甲基十五烷)、Pr(2,6,10,14-四甲基十五烷)和Ph(2,6,10,14-四甲基十六烷)及其非对映异构体.并考察了色谱柱类型、长度、程序升温等对类异戊二烯烷烃非对映异构体分离效果的影响,同时确定了程序升温色谱分离类异戊二烯烷烃非对映异构体的最佳条件,对样品中的降姥鲛烷、姥鲛烷、植烷与其非对映异构体进行了分离,对姥鲛烷、植烷的分离度最高可分别达0.7及0.9.%The separation of diastereoisomers of acyclic isoprenoid alkanes on HP-5 columns was firstly reported by gas ehromatography and mass speetrometry (GC-MS). The biomarkers of saturated hydrocarbons from coal samples of the Junggar Basin and crude oils of Gudao area were determined, and iC18(2,6,10-trimethyl penta-decane) , Pr (2,6,10,14-tetramethyl pentadecane) , Ph (2,6,10,14-tetramethyl hexadecane) and their diastereoisomers were identified from coal samples and crude oils. The effects of type and length of chromato-graphic column and temperature programming on the separation of diastereoisomers of acyclic isoprenoid alkanes were investigated. The most favorable separation conditions were concluded. The diastereoisomers were separated from nor-pristane, Pr and Ph, and the maximal resolution factors of Pr and Ph are 0.7, 0.9, respectively.
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