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The distribution of aerosol nitrate compounds with respect to particle size: vaporization analysis with the low pressure impactor

Citation

Moskowitz, Alan Henry (1977) The distribution of aerosol nitrate compounds with respect to particle size: vaporization analysis with the low pressure impactor. Master's thesis, California Institute of Technology. http://resolver.caltech.edu/CaltechTHESIS:03292010-084112194

Abstract

The atmospheric aerosol was sampled with a low pressure impactor at a coastal, an urban, and an agricultural site in the Los Angeles air basin. The material collected on each stage was analyzed for nitrate by direct vaporization into a chemiluminescent analyzer, sensitive at nanogram levels. The method responds to inorganic nitrate compounds which vaporize or decompose below about 1200°C. The coastal nitrate size distribution consists mainly of particles which have diameters greater than 2.0 µM, whereas the nitrate in the agricultural region is found primarily in the submicron range. The urban location, exhibiting characteristics of both coastal and agricultural regions, was bimodal about the 1-2 µm range. It is believed that the submicron aerosol is ammonium nitrate while the larger size fraction is sodium nitrate.

Item Type:Thesis (Master's thesis)
Subject Keywords:Chemistry
Degree Grantor:California Institute of Technology
Division:Chemistry and Chemical Engineering
Major Option:Chemistry
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Friedlander, Sheldon K.
Thesis Committee:
  • Unknown, Unknown
Defense Date:1 December 1976
Record Number:CaltechTHESIS:03292010-084112194
Persistent URL:http://resolver.caltech.edu/CaltechTHESIS:03292010-084112194
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:5639
Collection:CaltechTHESIS
Deposited By: Tony Diaz
Deposited On:15 Apr 2010 19:14
Last Modified:26 Dec 2012 03:23

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