Hydrocarbon distribution in sediments of Jakarta Bay

The analysis of sediments from stations 1, 29, 9, 15, 17 and 25 located in Jakarta Bay were carried out. Samples were Soxhlet-extracted for 14 hours with methylene chloride : methanol (1:1), followed by saponification using KOH in methanol and benzene. Unsaponification parts were extracted using n-hexanes. Extracted samples were analyzed using gas chromatography with capiler column of SPB-1. From chromatogram results it was noted that the analysis of sea sediment sea from each station in Jakarta'Bay indicate the distribution of n-alkanes in the range of C sub(14)-C sub(26) which were dominated by an even carbon. From the results it is assumed that Jakarta Bay sediment may have natural hydrocarbon sources which may come from either the red or blue algae.