Page 40 - Application Notebook - PFAS Analysis

No. SSI-LCMS-106

Table 4: Calculated concentrations for the low, mid, and high-level standards for all targets in EPA Method 8327.

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Compound RT (min) Conc % Signal/noise Conc % Conc %
(*)
Recoveries (S/N) Recoveries Recoveries

PFBA 3.382 4.48 90 3.28 42.37 106 196.7 98
M4PFBA 3.378 4.65 93 72.36 40.14 100 200.1 100
PFPeA 3.897 5.20 104 21.57 41.49 104 200.8 100
M5PFPeA 3.892 5.09 102 268.79 40.34 101 202.3 101
4-2 FTS 4.333 4.56 91 212.65 41.08 103 199.8 100
M2-4-2 FTS 4.319 4.82 96 71.11 41.48 104 200.8 100
PFHxA 4.544 4.95 99 44.95 41.10 103 198.3 99
M5PFHxA 4.542 4.99 100 830.68 40.57 101 198.5 99
PFBS 4.676 4.25 85 9.21 38.96 97 195.2 98
M3PFBS 4.674 5.15 103 172.98 39.32 98 202.2 101
PFHpA 5.219 4.99 100 37.17 39.01 98 196.1 98
M4PFHpA 5.217 4.93 99 1247.7 38.68 97 199.6 100
PFPeS 5.399 5.31 106 196.02 41.15 103 199.6 100
6-2 FTS 5.586 4.25 85 75.54 37.33 93 183.1 92
M2-6-2 FTS 5.591 4.94 99 61.36 39.19 98 205.0 103
PFOA 5.826 4.61 92 46.56 40.05 100 198.7 99
M8PFOA 5.827 4.50 90 611.9 41.73 104 195.5 98
PFHxS 6.062 5.69 114 (INF) 41.34 103 195.3 98
M3PFHxS 6.064 5.08 102 (INF) 41.46 104 204.1 102
PFNA 6.401 3.83 77 23.64 38.10 95 198.9 100
M9PFNA 6.397 5.13 103 292.26 39.58 99 195.4 98
8-2 FTS 6.681 4.04 81 (INF) 33.29 83 200.1 100
M2-8-2 FTS 6.673 4.92 98 31.79 35.90 90 198.6 99
PFHpS 6.663 4.35 87 (INF) 41.09 103 197.8 99
N-MeFOSAA 7.005 5.30 106 (INF) 39.93 100 208.6 104
d3-NMeFOSAA 7.001 5.98 120 (INF) 39.33 98 197.8 99
PFDA 6.93 5.45 109 64.37 40.68 102 201.1 101
M6PFDA 6.927 5.02 100 596.91 39.27 98 201.5 101
N-EtFOSAA 7.221 5.67 113 14.63 38.42 96 202.8 101
d5-NEtFOSAA 7.221 5.45 109 (INF) 44.72 112 200.8 100
PFOS 7.204 5.39 108 (INF) 34.56 86 196.8 98
M8PFOS 7.201 4.71 94 (INF) 36.86 92 195.4 98
PFUnA 7.426 5.42 108 21.82 41.21 103 197.1 99
M7PFUnA 7.423 5.34 107 545.68 43.51 109 203.8 102
PFNS 7.705 4.94 99 (INF) 44.30 111 198.2 99
PFDoA 7.893 5.14 103 54.66 37.82 95 205.8 103
M2PFDoA 7.889 5.11 102 (INF) 39.36 98 202.2 101
FOSA 8.207 4.95 99 (INF) 41.83 105 200.8 100
M8FOSA 8.215 4.94 99 1663.83 41.12 103 201.9 101
PFDS 8.188 4.94 99 (INF) 41.55 104 200.1 100
PFTriA 8.359 4.40 88 43.58 42.18 105 198.1 99
PFTreA 8.816 4.66 93 21.34 39.44 99 199.8 100
M2PFTreA 8.82 4.48 99 1703.08 37.43 94 198.0 99
(*) INF: S/N value when background noise is zero for a compound.

Table 5 outlines the Accuracy (spike %recovery) and Tables 6-9 outline the surrogate percent recoveries
precision (%RSD) of targets and surrogates spiked at and precision (%RSD) spiked at 160 ng/L in, reagent
80 ng/L in reagent water. The mean recovery for all water, ground water, surface water and wastewater
compounds were within 70 to 130% and the samples. Surrogate recoveries for all PFASs tested
precision (%RSD) were ≤ 20%, well within the QA were within 70 to 130% as required by the method
criteria outlined in drafted EPA method 8327. acceptance criteria and the precision (RSD%) were ≤
20%.