{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T19:56:51Z","timestamp":1784750211835,"version":"3.55.0"},"reference-count":16,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2005,1,12]],"date-time":"2005-01-12T00:00:00Z","timestamp":1105488000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rapid Comm Mass Spectrometry"],"published-print":{"date-parts":[[2005,2,15]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    A pre\u2010concentration system has been validated for use with a gas chromatography\/mass spectrometry\/isotope ratio mass spectrometer (GC\/MS\/IRMS) to determine ambient air\n                    <jats:sup>13<\/jats:sup>\n                    C\/\n                    <jats:sup>12<\/jats:sup>\n                    C ratios for methyl halides (MeCl and MeBr) and chlorofluorocarbons (CFCs). The isotopic composition of specific compounds can provide useful information on their atmospheric budgets and biogeochemistry that cannot be ascertained from abundance measurements alone. Although pre\u2010concentration systems have been previously used with a GC\/MS\/IRMS for atmospheric trace gas analysis, this is the first study also to report system validation tests. Validation results indicate that the pre\u2010concentration system and subsequent separation technologies do not significantly alter the stable isotopic ratios of the target methyl halides, CFC\u201012 (CCl\n                    <jats:sub>2<\/jats:sub>\n                    F\n                    <jats:sub>2<\/jats:sub>\n                    ) and CFC\u2010113 (C\n                    <jats:sub>2<\/jats:sub>\n                    Cl\n                    <jats:sub>3<\/jats:sub>\n                    F\n                    <jats:sub>3<\/jats:sub>\n                    ). Significant, but consistent, isotopic shifts of \u221227.5\u2030 to \u221225.6\u2030 do occur within the system for CFC\u201011 (CCl\n                    <jats:sub>3<\/jats:sub>\n                    F), although the shift is correctible. The method presented has the capacity to separate these target halocarbons from more than 50 other compounds in ambient air samples. Separation allows for the determination of stable carbon isotope ratios of five of these six target trace atmospheric constituents within ambient air for large volume samples (\u226410\u2009L). Representative urban air analyses from Belfast City are also presented which give carbon isotope results similar to published values for\n                    <jats:sup>13<\/jats:sup>\n                    C\/\n                    <jats:sup>12<\/jats:sup>\n                    C analysis of MeCl (\u221239.1\u2030) and CFC\u2010113 (\u221228.1\u2030). However, this is the first paper reporting stable carbon isotope signatures for CFC\u201011 (\u221229.4\u2030) and CFC\u201012 (\u221237.0\u2030). Copyright \u00a9 2005 John Wiley &amp; Sons, Ltd.\n                  <\/jats:p>","DOI":"10.1002\/rcm.1791","type":"journal-article","created":{"date-parts":[[2005,1,12]],"date-time":"2005-01-12T07:16:56Z","timestamp":1105514216000},"page":"337-342","source":"Crossref","is-referenced-by-count":28,"title":["A method for carbon stable isotope analysis of methyl halides and chlorofluorocarbons at pptv concentrations"],"prefix":"10.1002","volume":"19","author":[{"given":"Marie E.","family":"Archbold","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kelly R.","family":"Redeker","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Simon","family":"Davis","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Trevor","family":"Elliot","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Robert M.","family":"Kalin","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2005,1,12]]},"reference":[{"key":"e_1_2_6_2_2","doi-asserted-by":"publisher","DOI":"10.1029\/JC088iC15p10915"},{"key":"e_1_2_6_3_2","doi-asserted-by":"publisher","DOI":"10.1029\/94JD00908"},{"key":"e_1_2_6_4_2","doi-asserted-by":"publisher","DOI":"10.1029\/1999JD900217"},{"key":"e_1_2_6_5_2","doi-asserted-by":"publisher","DOI":"10.1126\/science.251.4989.39"},{"key":"e_1_2_6_6_2","unstructured":"MontzkaSA FraserPJ et al.Scientific Assessment of Ozone Depletion: 2002 Global Ozone Research and Monitoring Project report no. 47 chap. 1. World Meteorological Organization: Geneva 2003."},{"key":"e_1_2_6_7_2","doi-asserted-by":"publisher","DOI":"10.1021\/cr0206566"},{"key":"e_1_2_6_8_2","doi-asserted-by":"publisher","DOI":"10.1002\/rcm.219"},{"key":"e_1_2_6_9_2","doi-asserted-by":"publisher","DOI":"10.1029\/2003GL018639"},{"key":"e_1_2_6_10_2","doi-asserted-by":"publisher","DOI":"10.1029\/JC085iC12p07383"},{"key":"e_1_2_6_11_2","doi-asserted-by":"publisher","DOI":"10.1023\/A:1019820208377"},{"key":"e_1_2_6_12_2","doi-asserted-by":"publisher","DOI":"10.1073\/pnas.101129798"},{"key":"e_1_2_6_13_2","doi-asserted-by":"publisher","DOI":"10.1021\/es991329r"},{"key":"e_1_2_6_14_2","doi-asserted-by":"publisher","DOI":"10.1021\/es0106467"},{"key":"e_1_2_6_15_2","doi-asserted-by":"publisher","DOI":"10.1023\/A:1022116304550"},{"key":"e_1_2_6_16_2","doi-asserted-by":"publisher","DOI":"10.1023\/A:1016105030624"},{"key":"e_1_2_6_17_2","doi-asserted-by":"publisher","DOI":"10.1002\/rcm.1246"}],"container-title":["Rapid Communications in Mass Spectrometry"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1002%2Frcm.1791","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/analyticalsciencejournals.onlinelibrary.wiley.com\/doi\/pdf\/10.1002\/rcm.1791","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,26]],"date-time":"2025-10-26T13:55:57Z","timestamp":1761486957000},"score":1,"resource":{"primary":{"URL":"https:\/\/analyticalsciencejournals.onlinelibrary.wiley.com\/doi\/10.1002\/rcm.1791"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2005,1,12]]},"references-count":16,"journal-issue":{"issue":"3","published-print":{"date-parts":[[2005,2,15]]}},"alternative-id":["10.1002\/rcm.1791"],"URL":"https:\/\/doi.org\/10.1002\/rcm.1791","archive":["Portico"],"relation":{},"ISSN":["0951-4198","1097-0231"],"issn-type":[{"value":"0951-4198","type":"print"},{"value":"1097-0231","type":"electronic"}],"subject":[],"published":{"date-parts":[[2005,1,12]]}}}