Perfluoroalkylated substances in the global tropical and subtropical surface oceans

n this study, perfluoroalkylated substances (PFASs) were analyzed in 92 surface seawater samples taken during the Malaspina 2010 expedition which covered all the tropical and subtropical Atlantic, Pacific and Indian oceans. Nine ionic PFASs including C6-C10 perfluoroalkyl carboxylic acids (PFCAs), C4 and C6-C8 perfluoroalkyl sulfonic acids (PFSAs) and two neutral precursors perfluoroalkyl sulfonamides (PFASAs), were identified and quantified. The Atlantic Ocean presented the broader range in concentrations of total PFASs (131-10900 pg/L, median 645 pg/L, n=45) compared to the other oceanic basins, probably due to a better spatial coverage. Total concentrations in the Pacific ranged from 344 to 2500 pg/L (median=527 pg/L, n=27) and in the Indian Ocean from 176 to 1976 pg/L (median=329, n=18).(…)

Belén González-Gaya , Jordi Dachs , Jose Luis Roscales , Gemma Caballero , and Begoña Jiménez, Environ. Sci. Technol., Just Accepted Manuscript, October 17, 2014
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