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Comparison of Measurements of Ambient Particle Nitrate With Semi-Continuous Instruments

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Abstract: Comparisons between two different semi-continuous monitors of ambient level particulate nitrate are interpreted for both field and laboratory studies. One instrument involves thermal desorption of particulate nitrate to form a combination of NO and NO2 gases which are detected as NO in a chemiluminescence monitor. The second instrument involves the collection of particulate nitrate in a mist chamber with subsequent analysis of nitrate ions by ion chromatography. Ambient measurements in Rubidoux, CA during July, 2003 as well as measurements in the research laboratories at the Research Triangle Park, NC indicate the occurrence of response saturation related to particulate water content. These experimental results are interpreted.

Although this work was reviewed by EPA and approved for publication, it may not necessarily reflect official Agency policy.
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Citation:Long, R. W., and W. A. Mcclenny. Comparison of Measurements of Ambient Particle Nitrate With Semi-Continuous Instruments. Presented at Symposium on Air Quality Measurement Methods and Technology, Research Triangle Park, NC, April 20-22, 2004.
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Contact: Liz Hope - (919) 541-2785 or hope.elizabeth@epa.gov
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Division: Human Exposure & Atmospheric Sciences Division
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Branch: Process Modeling Research Branch
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Product Type: Abstrct/Oral
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Presented: 04/20/2004
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Related Entries:
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Bullet Item Field Evaluation of New NOx/O3 Precursor Methods
spacer Relationship Reason:   A Project of the Product
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Last Updated on Monday, October 22, 2007
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