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Sulfur dioxide measurements using an ultraviolet light-emitting diode in combination with gas correlation techniques

Författare:
Publiceringsår: 2009
Språk: Engelska
Sidor: 699-704
Publikation/Tidskrift/Serie: Applied Physics B-Lasers and Optics
Volym: 94
Nummer: 4
Dokumenttyp: Artikel
Förlag: Springer Berlin / Heidelberg

Sammanfattning

The important air pollutant sulfur dioxide has a strong structured absorption band in the ultraviolet (UV) region around 300 nm. Recently, light-emitting diodes (LEDs) with structureless emission in a band about 15-nm wide in the UV region have become available. We demonstrate that they can be ideal sources for gas absorption measurements combined with the gas correlation technique, where an absorption cell with an optically thick column of the gas under investigation is used for analysing the target gas contents in a path between the LED and the measurement device. A sensitivity of 0.4 ppm sulfur dioxide was obtained with a 19-cm optical path length and 60-s integration time. Particularly compact and cost-effective monitors especially for industrial emissions can be envisaged.

Disputation

Nyckelord

  • Physics and Astronomy

Övriga

Published
Yes
  • ISSN: 0946-2171

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