Chemiluminescent method for nitric oxide and oxides of nitrogen (nitric oxide + nitrogen dioxide) analysis

1974 ◽  
Vol 8 (2) ◽  
pp. 149-152 ◽  
Author(s):  
Francis M. Black ◽  
John E. Sigsby
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Dioxide ◽  
Oxides Of Nitrogen ◽  
Chemiluminescent Method

scholarly journals A study of the chemical quality of ambient air at selected intersections in the Durban Metropolis

2003 ◽  
Author(s):  
◽  
Shalini Singh
Keyword(s):  
Nitric Oxide ◽  
Air Pollution ◽  
Nitrogen Dioxide ◽  
Ambient Air ◽  
Urban Environments ◽  
Motor Vehicles ◽  
Chemical Quality ◽  
Oxides Of Nitrogen ◽  
Combustion Processes

Motor vehicles are considered a major source of air pollution in urban environments. Nitrogen dioxide (N02) and nitric oxide (NO) which are collectively referred to as oxides of nitrogen (NOx) are formed at high temperatures during combustion processes in the engines of motor vehicles and are emitted via the exhaust into the atmosphere. Nitrogen dioxide is regarded as an irritant of the respiratory system.

scholarly journals Improvements in the profiles and distributions of nitric acid and nitrogen dioxide with the LIMS version 6 dataset

2010 ◽  
Vol 10 (10) ◽  
pp. 4741-4756 ◽  
Author(s):  
E. Remsberg ◽  
M. Natarajan ◽  
B. T. Marshall ◽  
L. L. Gordley ◽  
R. E. Thompson ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Nitrogen Dioxide ◽  
Theoretical Calculations ◽  
Spin Splitting ◽  
Oxides Of Nitrogen ◽  
Polar Night ◽  
Chemical Effects ◽  
Satellite Sensors ◽  
Precision And Accuracy

Abstract. The quality of the Nimbus 7 Limb Infrared Monitor of the Stratosphere (LIMS) nitric acid (HNO3) and nitrogen dioxide (NO2) profiles and distributions of 1978/1979 are described after their processing with an updated, Version 6 (V6) algorithm and subsequent archival in 2002. Estimates of the precision and accuracy of both of those species are developed and provided herein. The character of the V6 HNO3 profiles is relatively unchanged from that of the earlier LIMS Version 5 (V5) profiles, except in the upper stratosphere where the interfering effects of CO2 are accounted for better with V6. The accuracy of the retrieved V6 NO2 is also significantly better in the middle and upper stratosphere, due to improvements in its spectral line parameters and in the reduced biases for the accompanying V6 temperature and water vapor profiles. As a result of these important updates, there is better agreement with theoretical calculations for profiles of the HNO3/NO2 ratio, day-to-night NO2 ratio, and with estimates of the production of NO2 in the mesosphere and its descent to the upper stratosphere during polar night. In particular, the findings for middle and upper stratospheric NO2 should also be more compatible with those obtained from more recent satellite sensors because the effects of the spin-splitting of the NO2 lines are accounted for now with the LIMS V6 algorithm. The improved precisions and more frequent retrievals of the LIMS profiles along their orbit tracks provide for better continuity and detail in map analyses of these two species on pressure surfaces. It is judged that the chemical effects of the oxides of nitrogen on ozone can be studied quantitatively throughout the stratosphere with the LIMS V6 data.

Reactions of nitric oxide and nitrogen dioxide with coenzyme Q: involvement of the isoprenic chain

2013 ◽  
Vol 11 (8) ◽  
pp. 1399 ◽  
Author(s):  
Paola Astolfi ◽  
Laurence Charles ◽  
Didier Gigmes ◽  
Lucedio Greci ◽  
Corrado Rizzoli ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Nitrogen Dioxide ◽  
Coenzyme Q
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