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The isotopic compositions of anthropogenic and natural NO\n                      <jats:sub>2<\/jats:sub>\n                      sources are wide\u2010ranging, and they can be used to constrain sources of ambient NO\n                      <jats:sub>2<\/jats:sub>\n                      and associated atmospheric deposition of nitrogen compounds. While passive sample collection of NO\n                      <jats:sub>2<\/jats:sub>\n                      isotopes has been used in field studies to determine NO\n                      <jats:sub>x<\/jats:sub>\n                      source influences on atmospheric deposition, this approach has not been evaluated for accuracy or precision under different environmental conditions.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>\n                      The efficacy of NO\n                      <jats:sub>2<\/jats:sub>\n                      passive sampler collection for NO\n                      <jats:sub>2<\/jats:sub>\n                      isotopes was evaluated under varied temperature and relative humidity (RH) conditions in a dynamic flux chamber. The precision and accuracy of the filter NO\n                      <jats:sub>2<\/jats:sub>\n                      collection as nitrite (NO\n                      <jats:sub>2<\/jats:sub>\n                      <jats:sup>\u2013<\/jats:sup>\n                      ) for isotopic analysis were determined using a reference NO\n                      <jats:sub>2<\/jats:sub>\n                      gas tank and through inter\u2010calibration with a modified EPA Method 7. The bacterial denitrifer method was used to convert 20 \u03bcM of collected NO\n                      <jats:sub>2<\/jats:sub>\n                      <jats:sup>\u2013<\/jats:sup>\n                      or nitrate (NO\n                      <jats:sub>3<\/jats:sub>\n                      <jats:sup>\u2013<\/jats:sup>\n                      ) into N\n                      <jats:sub>2<\/jats:sub>\n                      O and was carried out on an Isoprime continuous flow isotope ratio mass spectrometer.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>\n                      \u03b4\n                      <jats:sup>15<\/jats:sup>\n                      N\u2010NO\n                      <jats:sub>2<\/jats:sub>\n                      values determined from passive NO\n                      <jats:sub>2<\/jats:sub>\n                      collection, in conditions of 11\u201334 \u00b0C, 1\u201378% RH, have an overall accuracy and precision of \u00b12.1 \u2030, and individual run precision of \u00b10.6 \u2030. \u03b4\n                      <jats:sup>18<\/jats:sup>\n                      O\u2010NO\n                      <jats:sub>2<\/jats:sub>\n                      values obtained from passive NO\n                      <jats:sub>2<\/jats:sub>\n                      sampler collection, under the same conditions, have an overall precision of \u00b1 1.3 \u2030.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusions<\/jats:title>\n                    <jats:p>\n                      Suitable conditions for passive sampler collection of NO\n                      <jats:sub>2<\/jats:sub>\n                      isotopes are in environments ranging from 11 to 34 \u00b0C and 1 to 78% RH. The passive NO\n                      <jats:sub>2<\/jats:sub>\n                      isotope measurement technique provides an accurate method to determine variations in atmospheric \u03b4\n                      <jats:sup>15<\/jats:sup>\n                      N\u2010NO\n                      <jats:sub>2<\/jats:sub>\n                      values and a precise method for determining atmospheric \u03b4\n                      <jats:sup>18<\/jats:sup>\n                      O\u2010NO\n                      <jats:sub>2<\/jats:sub>\n                      values. The ability to measure NO\n                      <jats:sub>2<\/jats:sub>\n                      isotopes over spatial gradients at the same temporal resolution provides a unique perspective on the extent and seasonality of fluctuations in atmospheric NO\n                      <jats:sub>2<\/jats:sub>\n                      isotopic compositions. Copyright \u00a9 2017 John Wiley &amp; Sons, Ltd.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/rcm.7885","type":"journal-article","created":{"date-parts":[[2017,4,20]],"date-time":"2017-04-20T23:36:57Z","timestamp":1492731417000},"page":"1211-1220","source":"Crossref","is-referenced-by-count":7,"title":["Efficacy of passive sampler collection for atmospheric NO\n                    <sub>2<\/sub>\n                    isotopes under simulated environmental conditions"],"prefix":"10.1002","volume":"31","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3882-3064","authenticated-orcid":false,"given":"Justin G.","family":"Coughlin","sequence":"first","affiliation":[{"name":"Department of Geology and Environmental Science University of Pittsburgh  Pittsburgh PA 15260 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhongjie","family":"Yu","sequence":"additional","affiliation":[{"name":"Department of Geology and Environmental Science University of Pittsburgh  Pittsburgh PA 15260 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emily M.","family":"Elliott","sequence":"additional","affiliation":[{"name":"Department of Geology and Environmental Science University of Pittsburgh  Pittsburgh PA 15260 USA"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2017,6,18]]},"reference":[{"key":"e_1_2_6_2_1","first-page":"996","volume-title":"Climate Change 2007: The Physical Science Basis. 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