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Petroleum molecular fossil (biomarker) determination constitutes a formidable analytical challenge, because it demands detecting and quantifying specific trace-level molecules within highly complex hydrocarbon mixtures. This article highlights certain results of importance to organic geochemistry, which have been possible thanks to the use of mass spectrometry as a highly sensitive and selective detection system, in conjunction with the high resolution provided by one-dimensional or comprehensive (GC × GC) gas chromatography. Representative examples of recent biomarker studies in petroleum and environmental geochemistry have been selected.

La cromatografía de gases acoplada a espectrometría de masas como herramienta de alta selectividad para caracterizar fósiles químicos en el petróleo