Page 17 - Shimadzu Journal vol.7 Issue1

Environmental Analysis

Fig. 7 Schematic of the ASTM D7979 extraction

SSI provided a secondary validation of ASTM D7979 . During the water ratios cannot be changed. If the ratio is lowered, loss of analyte
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course of our method ruggedness study, we discovered a few details occurs. If the ratio is higher, the sample is diluted.
that needed clarification. First, as shown in Fig. 8, the 50:50 methanol
200.00%
180.00% PFBA
PFPeA
160.00% PFHxA
140.00% PFBS
PFHpA
120.00% PFOA
PFHxS
100.00% PFNA 10%
80.00% PFDA
PFOS
60.00% PFUnA
40.00% PFDoA
PFTriA
20.00% PFTreA
0.00%
0.0 100.0 200.0 300.0 400.0
140.00%
PFBA
120.00% PFPeA
PFHxA
100.00% PFBS
PFHpA
80.00% PFOA
PFHxS
60.00% PFNA 30%
PFDA
PFOS
40.00% PFUnA
PFDoA
20.00% PFTriA
PFTreA
0.00%
0.0 100.0 200.0 300.0 400.0
140.00%
120.00% PFBA
PFPeA
100.00% PFHxA
PFBS
PFHpA
80.00% PFOA
PFHxS 50%
PFNA
60.00% PFDA
PFOS
40.00% PFUnA
PFDoA
PFTriA
20.00% PFTreA
0.00%
0.0 100.0 200.0 300.0 400.0
Fig. 8 Recovery of PFAS in different methanol concentrations
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