Analysis of crocetane in crude oils and sediments: novel stationary phases for use in GC-MS

被引：8

作者：

Barber, CJ ^{[1
]}

Bastow, TP ^{[1
]}

Grice, K ^{[1
]}

Alexander, R ^{[1
]}

Kagi, RI ^{[1
]}

机构：

[1] Curtin Univ, Sch Appl Chem,Ctr Petr & Environm Organ Geochem, Western Austalian State Ctr Excellence Mass Spect, Australian Petr Cooperat Res Ctr, Perth, WA 6895, Australia

来源：

ORGANIC GEOCHEMISTRY | 2001年 / 32卷 / 05期

关键词：

crocetane; phytane; cyclodextrin stationary phases;

D O I：

10.1016/S0146-6380(01)00031-6

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Cyclodextrin GC stationary phases, well documented for their superior isomeric separation capabilities, have been investigated in the separation of crocetane (2,6,11,15-tetramethylhexadecane) and phytane (2,6,10,14-tetramethylhexadecane). Although crocetane has been attributed to methane oxidizing archaea, its general occurrence in crude oils and sediments is yet to be fully established due to difficulties associated with the CC-MS analysis since crocetane co-elutes with phytane when chromatographed on most liquid phase coated capillary columns. A method is described for the routine CC-MS analysis of crocetane and phytane in crude oils and sediments, using cyclodextrin stationary phases. Numerous derivatised cyclodextrin columns were investigated. A 50 m permethyl-beta -cyclodextrin was found to give the best resolution (R = 0.8 using hydrogen as the carrier gas and R = 0.7 using helium). (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：765 / 769

页数：5

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