Whereas PFOA was detected in the SACW and in similar concentrations among profiles (30, 13 ± 5, and 22 pg L –1 ; #5, #7, and #9, respectively), FOSA showed an increasing trend from 18°S northwards to the Equator (59 ± 47, 30 ± 26, and 6 ± 2 pg L –1 , in samples #5, #7, and #9, respectively).
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