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Applied Optics

Applied Optics


  • Editor: James C. Wyant
  • Vol. 47, Iss. 29 — Oct. 10, 2008
  • pp: 5337–5340

Nitrogen dioxide monitoring using a blue LED

Feng Xu, Zhe Lv, Xiutao Lou, Yungang Zhang, and Zhiguo Zhang  »View Author Affiliations

Applied Optics, Vol. 47, Issue 29, pp. 5337-5340 (2008)

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We report on a monitoring technique for nitrogen dioxide based on broadband absorption spectroscopy using a blue light-emitting diode (LED) operating around 465 nm . The technique is suited for real-time measurements of nitrogen dioxide due to the use of a straightforward data evaluation method, limited interference from other gases, and a low degree of complexity compared with other real-time optical detection techniques having the same precision. Additionally, the use of a LED can reduce the cost of nitrogen dioxide monitoring. Real-time measurements of nitrogen dioxide concentration were demonstrated at atmospheric pressure, which is of great interest for industrial nitrogen dioxide emission monitoring; a detection limit of about 3 ppm using a 50 - cm -long gas cell with 2 s integration time was achieved.

© 2008 Optical Society of America

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(300.1030) Spectroscopy : Absorption
(300.6550) Spectroscopy : Spectroscopy, visible

ToC Category:

Original Manuscript: March 10, 2008
Revised Manuscript: August 30, 2008
Manuscript Accepted: September 10, 2008
Published: October 7, 2008

Feng Xu, Zhe Lv, Xiutao Lou, Yungang Zhang, and Zhiguo Zhang, "Nitrogen dioxide monitoring using a blue LED," Appl. Opt. 47, 5337-5340 (2008)

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