DIODE LASER SYSTEM FOR MEASUREMENT OF GASEOUS AMMONIA IN AMBIENT AIR
The use of a second harmonic diode laser system for monitoring gaseous ammonia in tropospheric air is discussed. Using a 96 m White cell operated at 13 torr pressure in flow mode, a minimum detectable concentration lower than 1 ppbv was obtained. The NH-3 mixing ratio was determined by simultaneous spectroscopic analysis of an atmospheric CO-2 line used as a built-in calibration standard.
Bibliographic Reference: ENVIRONMENTAL MONITORING AND ASSESSMENT VOL. 5 (1985), PP. 271-281
Record Number: 1989124046600 / Last updated on: 1987-01-01
Available languages: en