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  • Laser Applications to Chemical and Environmental Analysis
  • Technical Digest (Optica Publishing Group, 2004),
  • paper WA2

Ultra-sensitive ambient trace-gas sensor using CO2 lasers and photoacoustic spectroscopy

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Abstract

An ambient trace-gas sensor based on photoacoustic spectroscopy and CO2 lasers has been developed with a minimum detectivity for ammonia better than 50 parts-per-trillion. This sensor has been deployed in an intercomparison with ion chromatography.

© 2004 Optical Society of America

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