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Sadanaga Y, Suzuki K, Yoshimoto T, et al. Direct measurement system of nitrogen dioxide in the atmosphere using a blue light-emitting diode induced fluorescence technique. Rev Sci Instrum. 2014;85(6):064101doi: 10.1063/1.4879821.
Sadanaga, Y., Suzuki, K., Yoshimoto, T., & Bandow, H. (2014). Direct measurement system of nitrogen dioxide in the atmosphere using a blue light-emitting diode induced fluorescence technique. The Review of scientific instruments, 85(6), 064101. https://doi.org/10.1063/1.4879821
Sadanaga, Yasuhiro, et al. "Direct measurement system of nitrogen dioxide in the atmosphere using a blue light-emitting diode induced fluorescence technique." The Review of scientific instruments vol. 85,6 (2014): 064101. doi: https://doi.org/10.1063/1.4879821
Sadanaga Y, Suzuki K, Yoshimoto T, Bandow H. Direct measurement system of nitrogen dioxide in the atmosphere using a blue light-emitting diode induced fluorescence technique. Rev Sci Instrum. 2014 Jun;85(6):064101. doi: 10.1063/1.4879821. PMID: 24985825.
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Rev Sci Instrum. 2014 Jun;85(6):064101. doi: 10.1063/1.4879821.

Direct measurement system of nitrogen dioxide in the atmosphere using a blue light-emitting diode induced fluorescence technique.

The Review of scientific instruments

Yasuhiro Sadanaga, Kazunari Suzuki, Takatoshi Yoshimoto, Hiroshi Bandow

Affiliations

  1. Graduate School of Engineering, Osaka Prefecture University, 1-1 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8531, Japan.

PMID: 24985825 DOI: 10.1063/1.4879821

Abstract

An instrument for measuring atmospheric nitrogen dioxide has been developed by a light-emitting diode induced fluorescence (LED-IF) technique. Air was introduced into a fluorescence detection cell. A pulsed blue light LED with a peak wavelength of 430 nm was irradiated to excite NO2 molecules in this cell. Fluorescence emitted from excited NO2 molecules was detected by a dynode-gated photomultiplier tube. The current detection limit of the LED-IF instrument was estimated to be 7.0 and 0.91 ppbv (parts per billion by volume) at 1-min and 1-h integration times, respectively, with a signal to noise ratio of 2. This result indicates that this LED-IF instrument can measure sufficiently precise 1-h values of NO2 concentrations in the urban atmosphere. An NO2 test observation and an intercomparison of the LED-IF instrument with an NO2 measurement system based on a photolytic converter/NO-O3 chemiluminescence method were performed in the urban atmosphere. Concentration differences between the two methods were within ±25% for about 90% of the data. It has been demonstrated by these observations that NO2 concentrations can be observed in the urban areas using the LED-IF instrument.

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