6:2 FTS ND 0.030 0.10 Compound Mean (ng L-1) MDLs (ng L-1) MQLs (ng L-1) FOSA ND 0.030 0.10 MeFOSA ND 0.030 0.10 MeFOSE ND 0.030 0.10 EtFOSE ND 0.030 0.10 MeFOSAA ND 0.030 0.10 EtFOSAA ND 0.030 0.10 a ND = not detected. Table S6. Average recoveries (%) of internal standards ± standard deviation (SD) for the field aqueous phase samples)for rivers and seas (n = 56) Internal standard Recovery ± SD [13C4]-PFBA 111 ± 29 % 87 ± 21 % [13C4]-PFOA 102 ± 23 % [13C9]-PFNA 102 ± 24 % 100 ± 24 % 97 ± 24 % 85 ± 23 % [18O2]-PFHxS 91 ± 25 % [13C4]-PFOS 102 ± 23 % [13C8]-FOSA 90 ± 21 % [d7]-MeFOSE 61 ± 21 % [d9]-EtFOSE 56 ± 20 % [d3]-MeFOSAA 107 ± 31 % [d5]-EtFOSAA 102 ± 30 % S7. Standard deviation (%) of duplicate river samples (n = 5) (ID R4, R7, R15, R17 and R23) Average SD (%) SD (%) for all PFBA PFOA PFNA PFDA PFUnDA PFDoDA FOSA PFOS PFASs Average SD (%) 11 16 30 49 38 44 42 56 36 for PFAS
6:2 FTS ND 0.030 0.10 Compound Mean (ng L-1) MDLs (ng L-1) MQLs (ng L-1) FOSA ND 0.030 0.10 MeFOSA ND 0.030 0.10 MeFOSE ND 0.030 0.10 EtFOSE ND 0.030 0.10 MeFOSAA ND 0.030 0.10 EtFOSAA ND 0.030 0.10 a ND = not detected. Table S6. Average recoveries (%) of internal standards ± standard deviation (SD) for the field aqueous phase samples)for rivers and seas (n = 56) Internal standard Recovery ± SD [13C4]-PFBA 111 ± 29 % 87 ± 21 % [13C4]-PFOA 102 ± 23 % [13C9]-PFNA 102 ± 24 % 100 ± 24 % 97 ± 24 % 85 ± 23 % [18O2]-PFHxS 91 ± 25 % [13C4]-PFOS 102 ± 23 % [13C8]-FOSA 90 ± 21 % [d7]-MeFOSE 61 ± 21 % [d9]-EtFOSE 56 ± 20 % [d3]-MeFOSAA 107 ± 31 % [d5]-EtFOSAA 102 ± 30 % S7. Standard deviation (%) of duplicate river samples (n = 5) (ID R4, R7, R15, R17 and R23) SD (%) Average SD (%) for all PFASs PFBA PFOA PFNA PFDA PFUnDA PFDoDA FOSA PFOS Average SD (%) for PFAS 11 16 30 49 38 44 42 56 36
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