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Published:Journal of Chromatographic Science,
ISSN 0021-9665 Volume
46, Number 4, April 2008, pp. 332-338
A Comparison of Results Obtained Using Liquid
Injection and Headspace Solid-Phase Microextraction for Crude
Oil Analysis by GC with Mass Spectrometer Detection
Maurizio D’Auria, Rocco Racioppi, and
Vincenzina Velluzzi
Dipartimento di Chimica, Università della Basilicata,
Via N. Sauro 85, 85100 Potenza, Italy
Gas chromatographic (GC) analysis in solution
and head space solid-phaes microextraction (SPME)–GC analysis
of a sample of crude oil gave different results. The SPME technique
allowed the identification of a larger number of components than
by using usual GC–mass spectrometry (MS). The method failed
within the range of C14–C25 where GC–MS in solution
allowed to obtain more representative results; on the contrary,
SPME allowed to obtain data on the presence of volatile compounds
that can not be identified in GC–MS analysis in solution.
Furthermore, in the range C8–C12, SPME allowed to identify
approximately 30 compounds not shown in the GC–MS analysis
in solution. SPME analysis showed the presence of some alkenes
not identified in GC–MS analysis in solution. SPME–GC–MS
can be used in the analysis of crude oil in contaminated soil.
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