Molecular and isotopic analysis of oils by solid phase microextraction of gasoline range hydrocarbons

被引：31

作者：

Harris, SA ^{[1
]}

Whiticar, MJ ^{[1
]}

Eek, MK ^{[1
]}

机构：

[1] Univ Victoria, Sch Earth & Ocean Sci, Victoria, BC V8W 2Y2, Canada

来源：

ORGANIC GEOCHEMISTRY | 1999年 / 30卷 / 8A期

基金：

加拿大自然科学与工程研究理事会;

关键词：

gasoline range hydrocarbons; SPME; headspace sampling; purge and trap; stable carbon isotopes; oil correlation; hydrocarbon fingerprinting; CF-IRMS;

D O I：

10.1016/S0146-6380(99)00056-X

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：

An improved method for molecular and stable isotope analysis of gasoline range hydrocarbons (C(5)-C(10)) in oils uses Solid Phase Microextraction. Analytes are sampled from the headspace above oil droplets and analyzed by gas chromatography and continuous-flow isotope-ratio mass spectrometry. Analytical considerations with this sampling technique include equilibration times, vapor pressure/temperature effects, and the presence of a complex matrix. Instrumentation factors such as column/split flows are also considered. The results are compared with an alternative purge and trap method. Molecular analyses prove reproducible between the two methods, however, stable carbon isotope ratios exhibit a non-systematic depletion and enrichment of 0.2-2.0 parts per thousand for 16 pre-selected compounds. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：721 / 737

页数：17

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