Data

Laboratory Methods for Evaluating Migrated High Molecular Weight Hydrocarbons in Marine Sediments at Naturally Occurring Oil Seeps

Australian Ocean Data Network
Logan, G. ; Abrams, M. ; Dahdah, N. ; Grosjean, E.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/67376&rft.title=Laboratory Methods for Evaluating Migrated High Molecular Weight Hydrocarbons in Marine Sediments at Naturally Occurring Oil Seeps&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/67376&rft.description=A laboratory study has been conducted to determine the best methods for the detection of C10 to C40 hydrocarbons at naturally occurring oil seeps in marine sediments. The results indicate that a commercially available method using hexane to extract sediments and gas chromatography to screen the resulting extract is effective at recognizing the presence of migrated hydrocarbons at concentrations between 50 to 5,000 ppm. When the oil charge is unbiodegraded the level of charge is effectively tracked by the sum of n-alkanes in the gas chromatogram. However, once the charge oil becomes biodegraded, with the loss of n-alkanes and isoprenoids, the level of charge is tracked by the quantification of the Unresolved Complex Mixture (UCM). The use of GC-MS was also found to be very effective for the recognition of petroleum related hydrocarbons and results indicate that GC-MS would be a very effective tool for screening samples at concentrations below 50 ppm oil charge.Maintenance and Update Frequency: unknownStatement: Unknown&rft.creator=Logan, G. &rft.creator=Abrams, M. &rft.creator=Dahdah, N. &rft.creator=Grosjean, E. &rft.date=2009&rft_rights=&rft_rights=Creative Commons Attribution 4.0 International Licence&rft_rights=CC-BY&rft_rights=4.0&rft_rights=http://creativecommons.org/licenses/&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Australian Government Security ClassificationSystem&rft_rights=https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=External Publication&rft_subject=geochemistry&rft_subject=organic geochemistry&rft_subject=marine&rft_subject=EARTH SCIENCES&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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WWW:LINK-1.0-http--link

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clientservices@ga.gov.au

Brief description

A laboratory study has been conducted to determine the best methods for the detection of C10 to C40 hydrocarbons at naturally occurring oil seeps in marine sediments. The results indicate that a commercially available method using hexane to extract sediments and gas chromatography to screen the resulting extract is effective at recognizing the presence of migrated hydrocarbons at concentrations between 50 to 5,000 ppm. When the oil charge is unbiodegraded the level of charge is effectively tracked by the sum of n-alkanes in the gas chromatogram. However, once the charge oil becomes biodegraded, with the loss of n-alkanes and isoprenoids, the level of charge is tracked by the quantification of the Unresolved Complex Mixture (UCM). The use of GC-MS was also found to be very effective for the recognition of petroleum related hydrocarbons and results indicate that GC-MS would be a very effective tool for screening samples at concentrations below 50 ppm oil charge.

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Maintenance and Update Frequency: unknown
Statement: Unknown

Issued: 2009

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Subjects
Earth Sciences | External Publication | Published_External | geochemistry | geoscientificInformation | marine | organic geochemistry |

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Link to Publication

doi : http://dx.doi.org/10.1016/j.orggeochem.2008.11.009

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