@article {707, title = {Tracking the weathering of an oil spill with comprehensive two-dimensional gas chromatography}, journal = {Environmental Forensics}, volume = {7}, year = {2006}, note = {032ldTimes Cited:62Cited References Count:21}, month = {Mar}, pages = {33-44}, abstract = {Comprehensive two-dimensional gas chromatography (GC x GC) was used to investigate the Bouchard 120 oil spill. The latter occurred on April 25, 2003, when the barge Bouchard 120 spilled similar to 375,000 liters of No. 6 fuel oil into Buzzards Bay, Massachusetts. In order to gain a better understanding of the natural processes affecting the fate of the spilled product, we collected and analyzed oil-covered rocks from Nyes Neck beach in North Falmouth, Massachusetts. Here we discuss the data from samples collected on May 9, 2003, and six months later, on November 23, 2003. Along with standard two-dimensional gas chromatographic analysis, we employed unique data-visualization techniques such as difference, ratio, and addition chromatograms to highlight how evaporation, water washing, and biodegradation weathered the spilled oil. These approaches provide a new perspective to studying oil spills and aid attempts to remediate them.}, issn = {1527-5922}, doi = {10.1080/15275920500506758}, author = {Nelson, R. K. and Kile, B. M. and Plata, D. L. and Sylva, S. P. and Xu, L. and Reddy, C. M. and Gaines, R. B. and Frysinger, G. S. and Reichenbach, S. E.} } @article {2104, title = {The West Falmouth oil spill after thirty years: the persistence of petroleum hydrocarbons in marsh sediments}, journal = {Environ Sci Technol}, volume = {36}, year = {2002}, note = {Reddy, Christopher MEglinton, Timothy I Hounshell, Aubrey White, Helen K Xu, Li Gaines, Richard B Frysinger, Glenn S eng Research Support, Non-U.S. Gov{\textquoteright}t Research Support, U.S. Gov{\textquoteright}t, Non-P.H.S. 2002/12/19 04:00 Environ Sci Technol. 2002 Nov 15;36(22):4754-60. }, month = {Nov 15}, pages = {4754-60}, abstract = {The long-term fate of petroleum hydrocarbons in marsh sediments (West Falmouth, MA) contaminated in 1969 by the spill of the barge Florida was investigated. A 36-cm-long sediment core was collected in August 2000, and sediment extracts were analyzed by gas chromatography (GC) and comprehensive two-dimensional gas chromatography (GC x GC). The latter technique is capable of separating 1 order of magnitude more compounds than the former and was used to observe whether any compositional changes in the unresolved complex mixture (UCM) occurred. No evidence of petroleum residues was detected in the top 6 cm (0-6 cm) and the lower 8 cm (28-36 cm) of the core. However, the central sections 16-28 cm) were dominated by a UCM in the boiling range of n-C13-n-C25 alkanes, consistent with a No. 2 fuel oil source. The 12-14- and 14-16-cm sections had the highest concentrations of UCM approximately 8 mg g(-1)). These values are similar to concentrations observed shortly after the spill. Initial GC x GC analysis revealed that only the n-alkanes were completely degraded, and contrary to previous studies, pristane and phytane as well as numerous other branched alkanes are still present in the sediments. These results suggestthatatthis site hydrocarbon contamination will persist indefinitely in the sedimentary record.}, keywords = {*Accidents, Chromatography, Gas, Environmental Monitoring, Geologic Sediments/*chemistry, Hydrocarbons/*analysis, Massachusetts, Petroleum/*analysis, Ships, Time Factors, Water Pollutants, Chemical/*analysis}, isbn = {0013-936X (Print)0013-936X (Linking)}, doi = {10.1021/es020656n}, url = {https://www.ncbi.nlm.nih.gov/pubmed/12487296}, author = {Reddy, C. M. and Eglinton, T. I. and Hounshell, A. and White, H. K. and Xu, L. and Gaines, R. B. and Frysinger, G. S.} } @article {409, title = {Identification of a novel alkenone in Black Sea sediments}, journal = {Organic Geochemistry}, volume = {32}, year = {2001}, note = {id: 1946; PT: J; UT: WOS:000168692100002}, pages = {633-645}, abstract = {We report the identification of a novel long-chain ketone in Holocene Black Sea sediments. Based on chemical properties, and chromatographic and mass spectrometric characteristics, this compound has been identified as a diunsaturated C-36 ethyl ketone. Further analyses indicated the position and configuration of the double bonds, and the novel alkenone was determined to be hexatriaconta-(16E,21E)-dien-3-one. While this compound is present in only trace quantities in Unit I sediments, it is the most abundant alkenone in portions of Unit II. Its presence thus apparently pre-dates the invasion of Emiliania huxleyi in the Black Sea. The down-core profiles and isotopic compositions suggest that the precursor for the C-36:2 alkenone may be distinct from that of the C37-39 alkenones, however the biological origin of this novel compound is presently unknown. (C) 2001 Elsevier Science Ltd. All rights reserved.}, issn = {0146-6380}, doi = {10.1016/S0146-6380(01)00019-5}, author = {Xu, L. and Reddy, C. M. and Farrington, J. W. and Frysinger, G. S. and Gaines, R. B. and Johnson, C. G. and Nelson, R. K. and Eglinton, T. I.} } @article {911, title = {Identification of a novel alkenone in Black Sea sediments}, journal = {Organic Geochemistry}, volume = {32}, year = {2000}, note = {id: 1719}, pages = {633-645}, abstract = {We report the identification of a novel long-chain ketone in Holocene Black Sea sediments. Based on chemical properties, and chromatographic and mass spectrometric characteristics, this compound has been identified as a di-unsaturated C36 ethyl ketone. Further analyses indicated the position and configuration of the double bonds, and the novel alkenone was determined to be hexatriaconta-(16E,21E)-dien-3-one. While this compound is present in only trace quantities in Unit I sediments, it is the most abundant alkenone in portions of Unit II. Its presence thus apparently pre-dates the invasion of Emiliania huxleyi in the Black Sea. The down-core profiles and isotopic compositions suggest that the precursor for the C36:2 alkenone may be distinct from that of the C37-39 alkenones, however the biological origin of this novel compound is presently unknown.}, keywords = {Alkenone, Black Sea, Haptophytes, Holocene, Sediment, Structure characterization}, doi = {10.1016/S0146-6380(01)00019-5}, author = {Xu, L. and Reddy, C. M. and Farrington, J. W. and Frysinger, G. S. and Gaines, R. B. and Johnson, C. G. and Nelson, R. K. and Eglinton, T. I.} }