Validation of in situ Measurements of Atmospheric Nitrous Acid Using Incoherent Broadband Cavity-enhanced Absorption Spectroscopy

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  • NAKASHIMA Yoshihiro
    Department of Environmental Science on Biosphere, Graduate School of Agriculture, Tokyo University of Agriculture and Technology
  • SADANAGA Yasuhiro
    Department of Applied Chemistry, Graduate School of Engineering, Osaka Prefecture University

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  • Validation of <i>in situ</i> Measurements of Atmospheric Nitrous Acid Using Incoherent Broadband Cavity-enhanced Absorption Spectroscopy

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Incoherent broadband cavity-enhanced absorption spectroscopy (IBBCEAS) is a useful technique for measuring trace gaseous species in the atmosphere. Recently, IBBCEAS was used to measure concentrations of nitrous acid (HONO) in the troposphere to resolve controversies related to its formation and loss. Here, measurements of HONO and a mixture of HONO and NO2 using IBBCEAS were validated by comparing them with those obtained with a NOx analyzer. Good agreement was found between these methods, given their respective experimental uncertainties. The detection limit of our IBBCEAS instrument was 0.2 ppbv, with a signal-to-noise ratio of 1, and a 5-min integration time.

収録刊行物

  • Analytical Sciences

    Analytical Sciences 33 (4), 519-524, 2017

    社団法人 日本分析化学会

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