Development of atmospheric NO analyzer by using a laser-induced fluorescence NO2 detector

Koji Miyazaki, Jun Matsumoto, Shungo Kato, Yoshizumi Kajii

研究成果: Article

8 引用 (Scopus)

抄録

In this study, we propose a new principle for measuring atmospheric NO using a laser-induced fluorescence (LIF) NO2 detector. NO is chemically converted into NO2; then, NO2 is detected by the LIF technique. To convert NO into NO2, ozone is added to sample air. Since there exists un-reacted NO and loss of NO2 due to further reaction of NO2 with ozone depending on both the concentration of ozone and reaction time, the enhanced NO2 concentration is less than the initial NO concentration. Using chemical kinetic analysis, we successfully derive the relationship between NO concentration and LIF signals. We also propose a unique calibration method for an LIF NO2 detector without using a chemiluminescent NOx analyzer; this method is based on the gas phase titration technique. The limits of the detection of the developed instrument for NO2 and NO measurements are 14 ppt and 22 ppt, respectively. We perform ambient air measurements in a suburb of Tokyo using the developed LIF NO analyzer and a commercial chemiluminescent NO analyzer. A comparison of the measurement results reveals that they are in excellent agreement, with a slope of 0.99 and a correlation coefficient of 0.99.

元の言語English
ページ(範囲)7812-7820
ページ数9
ジャーナルAtmospheric Environment
42
発行部数33
DOI
出版物ステータスPublished - 2008 10
外部発表Yes

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laser induced fluorescence
ozone
ambient air
detector
calibration
kinetics
air
gas

ASJC Scopus subject areas

  • Atmospheric Science
  • Environmental Science(all)

これを引用

Development of atmospheric NO analyzer by using a laser-induced fluorescence NO2 detector. / Miyazaki, Koji; Matsumoto, Jun; Kato, Shungo; Kajii, Yoshizumi.

:: Atmospheric Environment, 巻 42, 番号 33, 10.2008, p. 7812-7820.

研究成果: Article

Miyazaki, Koji ; Matsumoto, Jun ; Kato, Shungo ; Kajii, Yoshizumi. / Development of atmospheric NO analyzer by using a laser-induced fluorescence NO2 detector. :: Atmospheric Environment. 2008 ; 巻 42, 番号 33. pp. 7812-7820.
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AU - Kato, Shungo

AU - Kajii, Yoshizumi

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AB - In this study, we propose a new principle for measuring atmospheric NO using a laser-induced fluorescence (LIF) NO2 detector. NO is chemically converted into NO2; then, NO2 is detected by the LIF technique. To convert NO into NO2, ozone is added to sample air. Since there exists un-reacted NO and loss of NO2 due to further reaction of NO2 with ozone depending on both the concentration of ozone and reaction time, the enhanced NO2 concentration is less than the initial NO concentration. Using chemical kinetic analysis, we successfully derive the relationship between NO concentration and LIF signals. We also propose a unique calibration method for an LIF NO2 detector without using a chemiluminescent NOx analyzer; this method is based on the gas phase titration technique. The limits of the detection of the developed instrument for NO2 and NO measurements are 14 ppt and 22 ppt, respectively. We perform ambient air measurements in a suburb of Tokyo using the developed LIF NO analyzer and a commercial chemiluminescent NO analyzer. A comparison of the measurement results reveals that they are in excellent agreement, with a slope of 0.99 and a correlation coefficient of 0.99.

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KW - Laser-induced fluorescence

KW - New calibration system

KW - Nitrogen dioxide

KW - Nitrogen oxide

KW - Ozone

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