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Concentrations and trends of Perfluorinated chemicals in potential indoor sources from 2007 through 2011 in the US
Citation:
Liu, X., Z. Guo, Ken Krebs, R. Pope, AND N. Roache. Concentrations and trends of Perfluorinated chemicals in potential indoor sources from 2007 through 2011 in the US. CHEMOSPHERE. Elsevier Science Ltd, New York, NY, 98:51-57, (2014).
Impact/Purpose:
This market trend monitoring study provided a means to conduct independent assessment of the degree of success of the PFOA Stewardship Program.
Description:
Certain perfluorinated chemicals in consumer products have been associated with developmental toxicity and other adverse health effects. Temporal trends in the concentrations of selected perfluorinated chemicals (PFCs), including perfluorooctanoic acid (PFOA) and other perfluorocarboxylic acids (PFCAs), in 35 articles of commerce (AOCs) were measured from the year of 2007 through 2011. The article of commerce (AOC) samples that were collected included carpet, commercial carpet-care liquids, household carpet / fabric-care liquids, treated apparel, treated home textiles, treated non-woven medical garments, floor waxes, food-contact paper, membranes for apparel, and thread-sealant tapes. They were purchased from retail outlets in the United States between March 2007 and September 2011. The perfluorocarboxylic acid (PFCA) contents in AOCs have shown an overall downward trend. However, PFOA (C8) could still be detected in many AOCs that we monitored. Reductions of PFCAs were shown in both short-chain PFCAs (sum of C4 to C7) and long-chain PFCAs (sum of C8 to C12) over the monitored period. But there is no significant difference of changes observed between short-chain PFCAs and long-chain PFCAs. Fourteen AOC samples were analyzed to determine the amounts of perfluoroalkyl sulfonates (PFAS) they contained. These limited data show the pronounced increase of perfluoro-butane sulfonate (PFBS), an alternative to perfluorooctanoic sulfonate (PFOS), in the samples. A longer and wider range of monitoring will be required to confirm an observed trend.
