Authors: Jessica L Reiner Steven G O’Connell Craig M Butt Scott A Mabury Jeff M Small Amila O De Silva Derek C G Muir Amy D Delinsky Mark J Strynar Andrew B Lindstrom William K Reagen Michelle Malinsky Sandra Schäfer Christiaan J A F Kwadijk Michele M Schantz Jennifer M Keller
Publish Date: 2012/04/04
Volume: 404, Issue: 9, Pages: 2683-2692
Abstract
Standard reference materials SRMs are homogeneous wellcharacterized materials used to validate measurements and improve the quality of analytical data The National Institute of Standards and Technology NIST has a wide range of SRMs that have mass fraction values assigned for legacy pollutants These SRMs can also serve as test materials for method development method validation and measurement for contaminants of emerging concern Because interlaboratory comparison studies have revealed substantial variability of measurements of perfluoroalkyl acids PFAAs future analytical measurements will benefit from determination of consensus values for PFAAs in SRMs to provide a means to demonstrate methodspecific performance To that end NIST in collaboration with other groups has been measuring concentrations of PFAAs in a variety of SRMs Here we report levels of PFAAs and perfluorooctane sulfonamide PFOSA determined in four biological SRMs fish tissue SRM 1946 Lake Superior Fish Tissue SRM 1947 Lake Michigan Fish Tissue bovine liver SRM 1577c and mussel tissue SRM 2974a We also report concentrations for three inhouse qualitycontrol materials beluga whale liver pygmy sperm whale liver and whitesided dolphin liver Measurements in SRMs show an array of PFAAs with perfluorooctane sulfonate PFOS being the most frequently detected Reference and information values are reported for PFAAs measured in these biological SRMsWe would like to thank S Leigh of the NIST Statistical Engineering Division for statistical analysis of the results as part of the valueassignment process for the SRMs We would also like to thank Mary Williamson from the Water Science and Technology Directorate Burlington for her help in the analyses of SRMs 1946 and 1947Specific commercial equipment instruments or materials are identified in this paper to specify adequately the experimental procedure Such identification does not imply recommendation or endorsement by the National Institute of Standards and Technology nor does it imply that the materials or equipment identified are necessarily the best available for the purpose
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