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This document is the Intellectual Property of SGS AXYS Analytical Services Ltd. and contains Proprietary and Confidential Business <br />Information. It may not be reproduced or distributed without written permission of the owner. © SGS AXYS Analytical Services Ltd, 2020. <br />SGS AXYS Analytical Services Ltd, 2045 Mills Road W., Sidney, BC, Canada, V8L 5X2. Tel. (250) 655-5800, fax (250) 655-5811. <br />This is not a controlled document; it is subject to change without notification. <br /> <br />SGS AXYS Analytical Services Ltd. <br /> <br />MSU-110 Rev 14, 28-May-2020 Summary of MLA-110 Rev 02 Ver 07 Page 1 of 23 <br />SGS AXYS confidential, not to be distributed without written permission <br />SUMMARY OF SGS AXYS METHOD MLA-110 REV. 02 VER. 07 <br />Analytical Procedure for the Analysis of Per- and Polyfluoroalkyl <br />Substances (PFAS) in Aqueous Samples, Solids, Tissues, AFFF <br />Products, Blood/ Serums and Solvent Extracts by LC-MS/MS <br /> <br /> <br /> <br />This method describes the analysis of per- and polyfluoroalkyl substances (PFAS) in aqueous, <br />solid, biosolid, tissue, blood/serum, AFFF product samples and solvent extracts, determined as <br />the total of linear and branched isomers. After spiking with isotopically labeled surrogate <br />standards samples are extracted and cleaned up by Solid Phase Extraction (SPE). The extracts <br />are then analyzed by liquid chromatography/mass spectrometry (LC-MS/MS). Final sample <br />concentrations are determined by isotope dilution/internal standard quantification. <br />Typical reporting limits are shown below, for the method default sample sizes: <br />Analyte groups Aqueous <br />sample Extract 1 Solid 2 Biosolid 3 Tissues 4 AFFF <br />Products5 <br />Blood, <br />Serum <br />Typical sample size 0.5 L 0.75 mL 5 g 2.5 g 2.0 g 0.02 g 2 mL <br />Units ng/L ng/mL ng/g ng/g ng/g ng/g ng/mL <br />Perfluoroalkyl carboxylates 0.8-3.2 0.53-2.1 0.08-0.32 0.16-0.64 0.2-0.8 10-40 0.2-0.8 <br />Perfluoroalkyl sulfonates 0.8 0.53 0.08 0.16 0.2 10 0.2 <br />Fluorotelomer sulfonates 3.2 2.1 0.32 0.64 0.8 40 0.8 <br />Perfluorooctane <br />sulfonamides 0.8 0.53 0.08 0.16 0.2 10 0.2 <br />Perfluorooctane <br />sulfonamidoacetic acids 0.8 0.53 0.08 0.16 0.2 10 0.2 <br />Perfluorooctane <br />sulfonamide ethanols 8 5.3 0.8 1.6 2.0 100 2.0 <br />Per- and polyfluoroether <br />carboxylates 3.2 2.1 0.32 0.64 0.8 N/A 0.8 <br />Ether sulfonates 3.2 2.1 0.32 0.64 0.8 N/A 0.8 <br />1 Detection limits for extract samples depend on the samples size processed. The reporting limits <br />provided here are based on the typical extract sample size listed above. <br />2 A maximum of 10 g wet, or 5 g dry, solid may be analyzed. <br />3 A maximum of 5 g wet, or 0.5 g dry, biosolid may be analyzed. <br />4 A maximum of 2 g of tissue may be analyzed. <br />5 A maximum of 0.02 g of AFFF Product is analyzed. Reporting limits are based on the calibration A point. <br />The method is not currently validated for ether carboxylates/sulfonates in AFFF samples. Only Class B <br />aqueous film forming foams (AFFF) or alcohol-resistant AFFF (AR-AFFF) samples are part of this scope. <br />All samples will be logged in under an “AQIP” (Aqueous Industrial Product) matrix code in LIMS. Other <br />AFFF products such as fluoroprotein foams may be analyzed using this method but need special <br />www.axysanalytical.com <br />Page 6 of 94