Photoacoustic detection of ozone with a red laser diode

The photoacoustic detection of ozone using the Chappuis band is demonstrated. A visible red laser diode emitting at 638 nm was employed as a light source. The photoacoustic cell consisted of a conventional resonance tube with a MEMS (microelectromechanical systems) microphone placed outside an openi...

Full description

Saved in:
Bibliographic Details
Published inTalanta (Oxford) Vol. 223; no. Pt 2; p. 121890
Main Authors Keeratirawee, Kanchalar, Hauser, Peter C.
Format Journal Article
LanguageEnglish
Published Netherlands Elsevier B.V 01.02.2021
Subjects
calibration
detection limit
diodes
light
measurement
MEMS microphone
microphones
Ozone
Photoacoustic spectroscopy
Red laser diode
MEMS microphone
Ozone
Photoacoustic spectroscopy
Red laser diode
Online AccessGet full text

Cover

More Information
Summary:The photoacoustic detection of ozone using the Chappuis band is demonstrated. A visible red laser diode emitting at 638 nm was employed as a light source. The photoacoustic cell consisted of a conventional resonance tube with a MEMS (microelectromechanical systems) microphone placed outside an opening along the tube. A calibration curve for the range from 33 ppmV to 215 ppmV was found to be highly linear with a coefficient of determination (r2) of 0.9999, when allowing for different measurement frequencies to account for shifts in the speed of sound due to changes in the gas matrix. The limit of detection was found to be 1.6 ppmV for an optical power of the laser diode of about 130 mW. [Display omitted] •A visible laser diode is employed for the first time.•The light source is inexpensive.•The detection limit is in the low ppmV range.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0039-9140
1873-3573
1873-3573
DOI:10.1016/j.talanta.2020.121890