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The presence of petrogenic hydrocarbons was evaluated in surface sediments from the northeastern Havana littoral (Cuba). Different geochemical biomarkers were used to differentiate between biogenic and anthropogenic hydrocarbons. Sediment samples were Soxhlet extracted and analyzed by gas chromatography with flame ionization and mass spectrometer detectors. Total concentrations of aliphatic hydrocarbons ranged from 5.5 ± 0.3 to 225.7 ± 12.6 micrograms g–1. The presence of an unresolved complex mixture, and the detection of hopanes and of the isoprenoid compounds pristane and phytane revealed the occurrence of petroleum-derived hydrocarbons in the sediment samples.   En el presente trabajo se evaluo la presencia de hidrocarburos antropogenicos en sedimentos superficiales del litoral nordeste de La Habana. Se usaron diferentes biomarcadores geoquimicos con el objetivo de diferenciar entre hidrocarburos biogenicos y antropogenicos. Las muestras de sedimento fueron extraidas mediante Soxhlet y, posteriormente, analizadas utilizando la cromatografia gaseosa con detectores de ionizacion a la llama y espectrometria de masas. Las concentraciones totales de hidrocarburos alifaticos variaron de 5.5 ± 0.3 a 225.7 ± 12.6 microgramos g–1. La presencia de una mezcla compleja no resuelta y la deteccion de hopanos y de los compuestos isoprenoides pristano y fitano revelaron la existencia de hidrocarburos de origen petrogenico en las muestras de sedimentos.

Anthropogenic hydrocarbons in sediments of the northeastern Havana seaboard