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Corporate Overview

The Standard – August 2018

Per- and Polyfluoroalkyl Substances (PFAS) Update

Per- and polyfluoroalkyl substances (PFAS) have been among the most studied classes of chemical pollutants in recent years. With their properties of persistence, bioaccumulation, and long-range transport, perfluorooctane sulfonate (PFOS) and its related salts were added to the Stockholm Convention on Persistent Organic Pollutants at the 4th conference of the parties in 2009.Recently, the related compounds perfluorooctanoic acid (PFOA) and perfluorohexane sulfonate (PFHxS) have been proposed to be listed under the Convention.

While many PFAS have been detected, scrutinized, and even withdrawn from production over the past two decades, recent interest has increased significantly with detection in ground and surface waters near application sites of aqueous film-forming foam (AFFF). AFFF is used extensively to suppress hydrocarbon fuel fires, and PFAS contaminants have been found in drinking water around burn sites, as well as training areas for municipal and military firefighters. Many of the compounds found in AFFF have been implicated as possible sources of groundwater contaminants such as PFOS and PFOA upon degradation.2

AFFF products were initially produced via electrofluorination processes, though shortly thereafter the formulations were made via telomerization, a process yielding compounds with even-numbered perfluoroalkyl chains and various reactive groups separated by a non-fluorinated ethyl moiety. For many years, studies identified fluorotelomer sulfonates (FTS) as a major component of AFFF commercial formulations, with a common description of x:2 for the perfluoroalkyl:ethyl chains. FTS compounds with perfluoroalkyl chain lengths of 4:2, 6:2, 8:2, and 10:2 are most commonly identified in the commercial products.3  With large volumes being introduced to the environment, and degradation pathways identified, these compounds represent a large concern for the environment and especially in water sources. CIL has recently developed native and 13C/D-labeled FTS standards, including the full set of 4:2, 6:2, 8:2, and 10:2 analytes.

In late 2016, the US EPA announced a lifetime health advisory for exposure to PFOS and PFOA in drinking water. In response to regulatory action CIL has developed a set of PFOS/PFOA calibration and spiking solutions to assist with analysis of these two compounds at very low concentrations.

CIL also continues to develop new standards and standard mixtures to assist researchers with determination of PFAS in environmental, food, water, and human-exposure samples. In addition, CIL now offers a C4-C14 PFCA native standard mixture to go along with our C4-C10 PFAS native standard mixture.

Catalog No. Description Concentration Amount
CDLM-10249-1.2 1H,1H,2H,2H-Perfluorohexanesulfonic acid (4:2 FTS) (1,2-13C2; 1,1,2,2-D4)   Inquire
ULM-9993-1.2 1H,1H,2H,2H-Perfluorooctanesulfonic acid (4:2 FTS) (unlabeled)   Inquire
CDLM-10248-1.2 1H,1H,2H,2H-Perfluorooctanesulfonic acid (6:2 FTS) (1,2-13C2; 1,1,2,2-D4) 50 µg/mL in methanol 1.2 mL
ULM-9994-1.2 1H,1H,2H,2H-Perfluorooctanesulfonic acid (6:2 FTS) (unlabeled) 50 µg/mL in methanol 1.2 mL
CDLM-10247-1.2 1H,1H,2H,2H-Perfluorodecanesulfonic acid (8:2 FTS) (1,2-13C2; 1,1,2,2-D4)   Inquire
ULM-9995-1.2 1H,1H,2H,2H-Perfluorooctanesulfonic acid (8:2 FTS) (unlabeled)   Inquire
CDLM-10246-1.2 1H,1H,2H,2H-Perfluorododecanesulfonic acid (10:2 FTS) (1,2-13C2; 1,1,2,2-D4)   Inquire
ULM-9996-1.2 1H,1H,2H,2H-Perfluorooctanesulfonic acid (10:2 FTS) (unlabeled)   Inquire
ES-5570 PFOS/PFOA Calibration Series CS1 - CS5 2 µg/mL in methanol 5 x 0.25 mL
ES-5571 PFOS/PFOA Extraction Standard Mixture 2 µg/mL in methanol 3 mL
ES-5572 PFOS/PFOA Injection Standard Mixture   Inquire
ES-5573 PFOS/PFOA Native Standard Mixture   Inquire
ES-5576 Perfluoroalkylsulfonate (PFAS) C4-C10 Native Mixture 5 µg/mL in methanol 1.2 mL
ES-5587 Perfluoroalkylcarboxylic Acid (PFCA) C4-C14 Native Mixture 2 µg/mL in methanol 1.2 mL
1. Stockholm Convention(
2. Place, B.J.; Field, J.A. 2012. Identification of Novel Fluorochemicals in Aqueous Film-Forming Foams Used by the US Military Environ Sci Technol, 46(13), 7120-7127.
3. Schultz, M.M; Baretsky, D.F.; Field, J.A. 2004. Quantitative Determination of Fluorotelomer Sulfonates in Groundwater by LC MS/MS. Environ Sci Technol, 38 (6), 1828-1835.


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