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    A Chemical Ionization Mass Spectrometer for Ground-Based Measurements of Nitric Acid

    Source: Journal of Atmospheric and Oceanic Technology:;2006:;volume( 023 ):;issue: 008::page 1104
    Author:
    Kita, Kazuyuki
    ,
    Morino, Yu
    ,
    Kondo, Yutaka
    ,
    Komazaki, Yuichi
    ,
    Takegawa, Nobuyuki
    ,
    Miyazaki, Yuzo
    ,
    Hirokawa, Jun
    ,
    Tanaka, Shigeru
    ,
    Thompson, Thomas L.
    ,
    Gao, Ru-Shan
    ,
    Fahey, David W.
    DOI: 10.1175/JTECH1900.1
    Publisher: American Meteorological Society
    Abstract: A chemical ionization mass spectrometer (CIMS) instrument has been developed for high-precision measurements of gaseous nitric acid (HNO3) specifically under high- and variable-humidity conditions in the boundary layer. The instrument?s background signals (i.e., signals detected when HNO3-free air is measured), which depend on the humidity and HNO3 concentration of the sample air, are the most important factor affecting the limit of detection (LOD). A new system to provide HNO3-free air without changing both the humidity and the pressure of the sampled air was developed to measure the background level accurately. The detection limit was about 23 parts per trillion by volume (pptv) for 50-s averages. Field tests, including an intercomparison with the diffusion scrubber technique, were carried out at a surface site in Tokyo, Japan, in October 2003 and June 2004. A comparison between the measured concentrations of HNO3 and particulate nitrate indicated that the interference from particulate nitrate was not detectable (i.e., less than about 1%). The intercomparison indicated that the two independent measurements of HNO3 agreed to within the combined uncertainties of these measurements. This result demonstrates that the CIMS instrument developed in this study is capable of measuring HNO3 mixing ratios with the precision, accuracy, and time resolution required for atmospheric science.
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      A Chemical Ionization Mass Spectrometer for Ground-Based Measurements of Nitric Acid

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4227603
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    • Journal of Atmospheric and Oceanic Technology

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    contributor authorKita, Kazuyuki
    contributor authorMorino, Yu
    contributor authorKondo, Yutaka
    contributor authorKomazaki, Yuichi
    contributor authorTakegawa, Nobuyuki
    contributor authorMiyazaki, Yuzo
    contributor authorHirokawa, Jun
    contributor authorTanaka, Shigeru
    contributor authorThompson, Thomas L.
    contributor authorGao, Ru-Shan
    contributor authorFahey, David W.
    date accessioned2017-06-09T17:23:14Z
    date available2017-06-09T17:23:14Z
    date copyright2006/08/01
    date issued2006
    identifier issn0739-0572
    identifier otherams-84284.pdf
    identifier urihttp://onlinelibrary.yabesh.ir/handle/yetl/4227603
    description abstractA chemical ionization mass spectrometer (CIMS) instrument has been developed for high-precision measurements of gaseous nitric acid (HNO3) specifically under high- and variable-humidity conditions in the boundary layer. The instrument?s background signals (i.e., signals detected when HNO3-free air is measured), which depend on the humidity and HNO3 concentration of the sample air, are the most important factor affecting the limit of detection (LOD). A new system to provide HNO3-free air without changing both the humidity and the pressure of the sampled air was developed to measure the background level accurately. The detection limit was about 23 parts per trillion by volume (pptv) for 50-s averages. Field tests, including an intercomparison with the diffusion scrubber technique, were carried out at a surface site in Tokyo, Japan, in October 2003 and June 2004. A comparison between the measured concentrations of HNO3 and particulate nitrate indicated that the interference from particulate nitrate was not detectable (i.e., less than about 1%). The intercomparison indicated that the two independent measurements of HNO3 agreed to within the combined uncertainties of these measurements. This result demonstrates that the CIMS instrument developed in this study is capable of measuring HNO3 mixing ratios with the precision, accuracy, and time resolution required for atmospheric science.
    publisherAmerican Meteorological Society
    titleA Chemical Ionization Mass Spectrometer for Ground-Based Measurements of Nitric Acid
    typeJournal Paper
    journal volume23
    journal issue8
    journal titleJournal of Atmospheric and Oceanic Technology
    identifier doi10.1175/JTECH1900.1
    journal fristpage1104
    journal lastpage1113
    treeJournal of Atmospheric and Oceanic Technology:;2006:;volume( 023 ):;issue: 008
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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