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Gas chromatography: data obtained (view source)
Revision as of 15:46, 3 September 2014
, 15:46, 3 September 2014→Example of loss of C15+ fraction
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[[:file:oiloil-and-oilsource-rock-correlations_fig8-15.png|Figure 11]] shows a gas chromatogram of saturated hydrocarbons in a source rock extract from which the extracting solvent was evaporated too vigorously, leading to loss of some of the C<sub>15+</sub> fraction. This problem can be recognized by looking at the ''n''-C<sub>17</sub> and ''n''-C<sub>18</sub> peaks. Normally they are almost the same size, but in this case the ''n''-C<sub>17</sub> peak is much smaller. Pristane has also been depleted relative to phytane, leading to an erroneous pristane–phytane ratio unless some correction is made.
[[:file:oiloil-and-oilsource-rock-correlations_fig8-15.png|Figure 11]] shows a gas chromatogram of saturated hydrocarbons in a [[source rock]] extract from which the extracting solvent was evaporated too vigorously, leading to loss of some of the C<sub>15+</sub> fraction. This problem can be recognized by looking at the ''n''-C<sub>17</sub> and ''n''-C<sub>18</sub> peaks. Normally they are almost the same size, but in this case the ''n''-C<sub>17</sub> peak is much smaller. Pristane has also been depleted relative to phytane, leading to an erroneous [[pristane-phytane ratio]] unless some correction is made.
===Example of loss of light ends===
===Example of loss of light ends===