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Gas chromatography: data obtained (view source)
Revision as of 19:44, 11 February 2015
, 19:44, 11 February 2015no edit summary
| part = Critical elements of the petroleum system
| part = Critical elements of the petroleum system
| chapter = Oil–oil and oil–source rock correlations
| chapter = Oil–oil and oil–source rock correlations
| frompg = 8-1
| frompg = 8-18
| topg = 8-71
| topg = 8-29
| author = Douglas W. Waples, Joseph A. Curiale
| author = Douglas W. Waples, Joseph A. Curiale
| link = http://archives.datapages.com/data/specpubs/beaumont/ch08/ch08.htm
| link = http://archives.datapages.com/data/specpubs/beaumont/ch08/ch08.htm
| isbn = 0-89181-602-X
| isbn = 0-89181-602-X
}}
}}
[[File:GCMS closed.jpg|thumb|400px|GCMS closed|Gas chromatography mass spectrometer. Photo by [https://commons.wikimedia.org/wiki/User:Polimerek Polimerek].]]
[[File:GCMS_closed.jpg|thumb|400px|GCMS closed|Gas chromatography mass spectrometer. Photo by [https://commons.wikimedia.org/wiki/User:Polimerek Polimerek].]]
In [[gas chromatography]] the distributions of [[Wikipedia:Alkane#Linear_alkanes|''n''-alkanes]] and [[Wikipedia:Terpenoid|isoprenoids]] are usually most useful. Of particular significance for correlations are the wax content (C<sub>23+</sub>), the [[Wikipedia:Carbon Preference Index|carbon preference index (CPI)]]<ref name=ch08r3>Bray, E., E., Evans, E., D., 1961, Distribution of n-paraffins as a clue to recognition of source beds; ''Geochimica et Cosmochimica Acta'', vol. 22, p. 2–15., 10., 1016/0016-7037(61)90069-2</ref> and the [[pristane-phytane ratio]] (Pr/Ph). The following figures show gas chromatograms of the [[Wikipedia:Saturate, aromatic, resin and asphaltene|saturate fractions]] of several oils, illustrating the differences that can be observed in these compound classes as a result of differences in the source material.
In [[gas chromatography]] the distributions of [[Wikipedia:Alkane#Linear_alkanes|''n''-alkanes]] and [[Wikipedia:Terpenoid|isoprenoids]] are usually most useful. Of particular significance for correlations are the wax content (C<sub>23+</sub>), the [[Wikipedia:Carbon Preference Index|carbon preference index (CPI)]]<ref name=ch08r3>Bray, E., E., Evans, E., D., 1961, Distribution of n-paraffins as a clue to recognition of source beds; ''Geochimica et Cosmochimica Acta'', vol. 22, p. 2–15., 10., 1016/0016-7037(61)90069-2</ref> and the [[pristane-phytane ratio]] (Pr/Ph). The following figures show gas chromatograms of the [[Wikipedia:Saturate, aromatic, resin and asphaltene|saturate fractions]] of several oils, illustrating the differences that can be observed in these compound classes as a result of differences in the source material.