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Comparison of Measurement of Ambient Particle Nitrate With Semi-Continuopus Instruments

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Abstract:Comparisons between two different semi-continuos monitors of ambient level particulate nitrate are interpreted for both field and laboratory studies. One instrument involves flash vaporization of impacted 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 (IC). Ambient measurements in Rubidoux, CA during July 2003 as well as measurements in the EPA research laboratories at Research Triangle Park, NC suggest the occurrence of decreased instrumental response related to particle bound water (or other matrix) content for the monitor using flash vaporization. Both Ambient and laboratory experimental results are interpreted.

This is an abstract of a proposed presentation and does not necessarily reflect the United States Environmental Protection Agency (EPA) policy. The actual presentation has not been peer reviewed by EPA. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.
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Citation:Long, R. W., and W. A. Mcclenny. Comparison of Measurement of Ambient Particle Nitrate With Semi-Continuopus Instruments. Presented at Symposium on Air Quality Measurement Methods and Technology, Research Triangle Park, NC, April 20-22, 2004EPA/600/A-04/060 (NTIS PB2004-106814).
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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: Sympos/Conf
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Presented: 04/21/2004
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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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