Interlaboratory Study of Polyethylene and Polydimethylsiloxane Polymeric Samplers for Ex Situ Measurement of Freely-Dissolved Hydrophobic Organic Compounds in Sediment Porewater

dc.contributor.authorLotufo, Guilherme R.
dc.contributor.authorMichalsen, Mandy M.
dc.contributor.authorReible, Danny D.
dc.contributor.authorGschwend, Philip M.
dc.contributor.authorGhosh, Upal
dc.contributor.authorKennedy, Alan J.
dc.contributor.authorKerns, Kristen M.
dc.contributor.authorRakowska, Magdalena I.
dc.contributor.authorOdetayo, Adesewa
dc.contributor.authorMacFarlane, John K.
dc.contributor.authorYan, Songjing
dc.contributor.authorBokare, Mandar
dc.date.accessioned2022-06-09T23:10:28Z
dc.date.available2022-06-09T23:10:28Z
dc.date.issued2022-05-05
dc.description.abstractThis study evaluated the precision and accuracy of multi-laboratory measurements for determining freely dissolved concentrations (C free) of polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in sediment porewater (PW) using polydimethylsiloxane (PDMS) and low-density polyethylene (LDPE) polymeric samplers. Four laboratories exposed performance reference compound (PRC) pre-loaded polymers to actively mixed and static ex situ sediment for ~ 1 month; two laboratories had longer exposures (i.e., 2 and 3 months). For C free results, intra-laboratory precision was high for single compounds (CV ≤50%), and for most PAHs and PCBs interlaboratory variability was low (magnitude of difference ≤ factor 2) across polymers and exposure methods. Variability was higher for the most hydrophobic PAHs and PCBs, which were present at low concentrations and required larger PRC-based corrections, and for naphthalene, likely due to differential volatilization losses between laboratories. Overall, intra- and interlaboratory variability between methods (PDMS vs. LDPE, actively mixed vs. static exposures) was low. Results showed C free polymer equilibrium was achieved in ~ 1 month during active exposures, suggesting use of PRCs may be avoided for ex situ analysis using comparable active exposure; although such ex situ testing may not reflect field conditions. Polymer-derived C free concentrations for most PCBs and PAHs were on average within a factor of 2 compared to concentrations in isolated PW, which were directly measured by one laboratory; difference factors of up to 6 were observed for naphthalene and the most hydrophobic PAHs and PCBs. C free results were similar for academic and private sector laboratories. Demonstrated accuracy and precision for determination of C free using polymer sampling is anticipated to increase regulatory acceptance and confidence in method use.en_US
dc.description.sponsorshipThe Environmental Security Technology Certification Program (ESTCP ER-201735) funded the present study. The authors thank private sector laboratories participants in this study, namely Battelle Memorial Institute, Analytical Resources, Inc., SGS-Axys Enviro Lab, and Test America Lab. The authors also thank Alison Suess (Seattle District, U.S. Army Corps of Engineers), Mingta Lin (Pyron Environmental Inc.), and Marc Mills, Matthew Lambert (U.S. Environmental Protection Agency).en_US
dc.description.urihttps://setac.onlinelibrary.wiley.com/doi/epdf/10.1002/etc.5356en_US
dc.format.extent51 pagesen_US
dc.genrejournal articlesen_US
dc.identifierdoi:10.13016/m28bzr-lyfv
dc.identifier.citationLotufo, G.R., Michalsen, M.M., Reible, D.D., Gschwend, P.M., Ghosh, U., Kennedy, A.J., Kerns, K.M., Rakowska, M.I., Odetayo, A., MacFarlane, J.K., Yan, S. and Bokare, M. (2022), Interlaboratory Study of Polyethylene and Polydimethylsiloxane Polymeric Samplers for Ex Situ Measurement of Freely-Dissolved Hydrophobic Organic Compounds in Sediment Porewater. Environ Toxicol Chem. Accepted Author Manuscript. https://doi.org/10.1002/etc.5356en_US
dc.identifier.urihttps://doi.org/10.1002/etc.5356
dc.identifier.urihttp://hdl.handle.net/11603/24883
dc.language.isoen_USen_US
dc.publisherWileyen_US
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Chemical, Biochemical & Environmental Engineering Department Collection
dc.relation.ispartofUMBC Student Collection
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.en_US
dc.rightsPublic Domain Mark 1.0*
dc.rights.urihttp://creativecommons.org/publicdomain/mark/1.0/*
dc.titleInterlaboratory Study of Polyethylene and Polydimethylsiloxane Polymeric Samplers for Ex Situ Measurement of Freely-Dissolved Hydrophobic Organic Compounds in Sediment Porewateren_US
dc.typeTexten_US

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