GCxGC Detective Stories: The Case of the Disappearing Diesel

How GC×GC helped to reopen the “Silent Fall” oil-spill investigation and reveal what happened to diesel buried beneath Cape Cod’s salt marsh

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The 1969 diesel spill in Cape Cod released 189,000 gallons of fuel, severely impacting marine life and leading to long-term ecological studies.
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Initial analyses using one-dimensional gas chromatography (GC) revealed a shift from identifiable hydrocarbons to an unresolved complex mixture (UCM) over time.
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GC×GC analysis provided greater resolution, revealing patterns of biodegradation and preferential loss of aromatic hydrocarbons in weathered residues.
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The findings indicated that biodegradation was vigorous initially but declined due to changing environmental conditions in the marsh.
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Techniques developed from the Florida spill have been applied to various operational spill contexts, enhancing understanding of oil weathering processes.

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