ISSN:
1573-0662
Keywords:
Optimized chemiluminescence
;
detector
;
tropospheric
;
NO
;
NO x
;
measurements
;
interferences
;
vertical profile
;
ozone generator
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Geosciences
Notes:
Abstract A detector for the chemiluminescent measurement of NO in background air is described. A large reduction of interferences is achieved by using a stabilized ozone generator which allows operation of the instrument at lower O3 concentrations. Purification and humidification of the O3 stream further reduces interferences and shortens the instrumental clean-up time, which is important for aircraft missions. From a series of laboratory tests and from measurements performed aboard an aircraft it is demonstrated that the remaining interferences are acceptable for measurements in the undisturbed troposphere. In particular, no remnant NO signal is observed in clean air at night. During flight, a detection limit (2σ) of 20 ppt is achieved for a 1 min integration time.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00051078
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