Abstract
A method of interference correction for improving the sensitivity of
non-dispersive infrared (NDIR) gas analysis system is demonstrated. Based on the
proposed method, the interference due to water vapor and carbon dioxide in the NDIR
NO analyzer is corrected. After interference correction, the absorbance signal at
the NO filter channel is only controlled by the absorption of NO, and the
sensitivity of the analyzer is improved greatly. In the field experiment for
pollution source emission monitoring, the concentration trend of NO monitored by
NDIR analyzer is in good agreement with the differential optical absorption
spectroscopy NO analyzer. Small variations of NO concentration can also be resolved,
and the measuring correlation coefficient of the two analyzers is 94.28%.
© 2011 Chinese Optics Letters
PDF Article
More Like This
Cited By
You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.
Contact your librarian or system administrator
or
Login to access Optica Member Subscription