{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T02:46:53Z","timestamp":1789440413230,"version":"build-2803163510"},"reference-count":26,"publisher":"University of California Press","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2015,1,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>The growing awareness of climate change\/global warming, and continuing concerns regarding stratospheric ozone depletion, will require continued measurements and standards for many compounds, in particular halocarbons that are linked to these issues. In order to track atmospheric mole fractions and assess the impact of policy on emission rates, it is necessary to demonstrate measurement equivalence at the highest levels of accuracy for assigned values of standards. Precise measurements of these species aid in determining small changes in their atmospheric abundance. A common source of standards\/scales and\/or well-documented agreement of different scales used to calibrate the measurement instrumentation are key to understanding many sets of data reported by researchers. This report describes the results of a comparison study among National Metrology Institutes and atmospheric research laboratories for the chlorofluorocarbons (CFCs) dichlorodifluoromethane (CFC-12), trichlorofluoromethane (CFC-11), and 1,1,2-trichlorotrifluoroethane (CFC-113); the hydrochlorofluorocarbons (HCFCs) chlorodifluoromethane (HCFC-22) and 1-chloro-1,1-difluoroethane (HCFC-142b); and the hydrofluorocarbon (HFC) 1,1,1,2-tetrafluoroethane (HFC-134a), all in a dried whole air sample. The objective of this study is to compare calibration standards\/scales and the measurement capabilities of the participants for these halocarbons at trace atmospheric levels. The results of this study show agreement among four independent calibration scales to better than 2.5% in almost all cases, with many of the reported agreements being better than 1.0%.<\/jats:p>","DOI":"10.12952\/journal.elementa.000075","type":"journal-article","created":{"date-parts":[[2015,11,3]],"date-time":"2015-11-03T15:57:08Z","timestamp":1446566228000},"source":"Crossref","is-referenced-by-count":5,"title":["Comparison of halocarbon measurements in an atmospheric dry whole air sample"],"prefix":"10.1525","volume":"3","author":[{"given":"George C.","family":"Rhoderick","sequence":"first","affiliation":[{"name":"National Institute of Standards and Technology (NIST), Chemical Sciences Division, Materials Measurement Laboratory, Gaithersburg, Maryland, United States"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bradley D.","family":"Hall","sequence":"additional","affiliation":[{"name":"National Oceanic and Atmospheric Administration (NOAA), Global Monitoring Division, Earth Systems Research Laboratory, Boulder, Colorado, United States"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christina M.","family":"Harth","sequence":"additional","affiliation":[{"name":"Scripps Institution of Oceanography, La Jolla (SIO), University of California, San Diego, La Jolla, California, United States"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jin Seog","family":"Kim","sequence":"additional","affiliation":[{"name":"Korea Research Institute of Standards and Science (KRISS), Division of Metrology for Quality Life, Yusong, Daejeon, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jeongsoon","family":"Lee","sequence":"additional","affiliation":[{"name":"Korea Research Institute of Standards and Science (KRISS), Division of Metrology for Quality Life, Yusong, Daejeon, Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stephen A.","family":"Montzka","sequence":"additional","affiliation":[{"name":"National Oceanic and Atmospheric Administration (NOAA), Global Monitoring Division, Earth Systems Research Laboratory, Boulder, Colorado, United States"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jens","family":"M\u00fchle","sequence":"additional","affiliation":[{"name":"Scripps Institution of Oceanography, La Jolla (SIO), University of California, San Diego, La Jolla, California, United States"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Stefan","family":"Reimann","sequence":"additional","affiliation":[{"name":"Swiss Federal Laboratories for Materials Science and Technology (Empa), Laboratory for Air Pollution\/Environmental Technology, Dubendorf, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Martin K.","family":"Vollmer","sequence":"additional","affiliation":[{"name":"Swiss Federal Laboratories for Materials Science and Technology (Empa), Laboratory for Air Pollution\/Environmental Technology, Dubendorf, Switzerland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ray F.","family":"Weiss","sequence":"additional","affiliation":[{"name":"Scripps Institution of Oceanography, La Jolla (SIO), University of California, San Diego, La Jolla, California, United States"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"408","published-online":{"date-parts":[[2015,11,3]]},"reference":[{"key":"2021071507370098000_bibr001","doi-asserted-by":"crossref","first-page":"4944","DOI":"10.1016\/j.atmosenv.2010.08.019","article-title":"Tropospheric halocarbons and nitrous oxide monitored at a remote site in the Mediteranean","volume":"38","author":"Artuso","year":"2010","journal-title":"Atmos Environ"},{"key":"2021071507370098000_bibr002","doi-asserted-by":"publisher","first-page":"8806","DOI":"10.1029\/2002JD003367","article-title":"NMHC\u2019s and halocarbons in Asian Continental outflow during the Transport and Chemical Evolution over the Pacific (TRACE- P) Field Campaign: Comparison With PEM-West B","volume":"108","author":"Blake","year":"2003","journal-title":"J Geophys Res Lett"},{"key":"2021071507370098000_bibr003","doi-asserted-by":"crossref","first-page":"177","DOI":"10.1016\/0197-2456(86)90046-2","article-title":"Meta-analysis in clinical trials","volume":"7","author":"DerSimonian","year":"1986","journal-title":"Controlled Clin Trials"},{"issue":"D18306","key":"2021071507370098000_bibr004","doi-asserted-by":"publisher","DOI":"10.1029\/2005JD006035","article-title":"Conversion of NOAA atmospheric dry air CH4 mole fractions to a gravimetrically prepared standard scale","volume":"110","author":"Dlugokencky","year":"2005","journal-title":"J Geophys Res"},{"key":"2021071507370098000_bibr005","unstructured":"Forster\n              P\n            , RamaswamyV, ArtaxoP, BerntsenT, BettsR, et al.\n          2007. 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