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Perfluorochemicals (PFCs) are widely found in the water environment. In this study, a total of 19 PFCcompounds were monitored in surface waters collected from different locations in the highly urbanizedMarina Catchment of Singapore. Analysis results showed concentrations of PFCs ranging from sub ng/Lto tens ng/L. Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) were observed to bethe dominant species among the PFCs. Compounds regularly detected were perfluoroalkanoic acids (C7to C12) and perfluoroalkyl sulfonates (C6 and C8). In particular, intermediate PFCs such asperfluorooctanesulfonamide (FOSA), 2-(N-methylperfluorooctanesulfonamido) acetic acid (NMeFOSAA),and 2-(N-ethylperfluorooctanesulfonamido) acetic acid (N-EtFOSAA) were measured fromundetectable levels to 10 ng/L. In general, the concentrations of PFCs fluctuated with varying conditions of weather and water regime. Includes references, figures.

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Edition: Vol. - No. Published: 11/01/2009 Number of Pages: 7File Size: 1 file , 840 KB