THERMAL RELEASE OF NITRIC OXIDE FROM AMBIENT AIR AND DIESEL PARTICLES

In recent years, there have been many reports of an association between daily increases in particle air pollution (PM10) and daily increases in mortality and morbidity. Despite these reports, there are still unresolved issues with these studies, including the problem of finding a plausible biological mechanism by which small increases in daily particle levels could cause adverse human effects. Chemical characterisation of particles is a crucial step in testing any biological mechanism. The research reported in this paper has characterised gas-phase material associated with particles from various sources, and found that measurable amounts of nitrogen oxide (NO) can be thermally released from these particles. NO was analysed using chemiluminescence and Fourier transform infared (FTIR) spectroscopy techniques. The paper outlines the experimental procedure used, and reports the quantitative results of releasing NO from four National Institute of Standards and Technology (NIST) reference materials when samples were heated for one hour. Two of the materials were ambient to air particulate samples, and two were diesel particulate samples. These experiments showed that NO can be released from some particles at physiological temperatures (37C).

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0013936X
• Corporate Authors:

  American Chemical Society

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  Washington, DC  United States  20036
• Authors:
  • Ball, J C
  • HURLEY, M D
  • STRACCIA, A
  • GIERCZAK, C
• Publication Date: 1999-4-15

Language

• English

Media Info

• Features: References;
• Pagination: p. 1175-8
• Serial:
  • Environmental Science & Technology
  • Volume: 33
  • Issue Number: 8
  • Publisher: American Chemical Society
  • ISSN: 0013-936X
  • EISSN: 1520-5851
  • Serial URL: http://pubs.acs.org/journal/esthag

Subject/Index Terms

• TRT Terms: Air pollution; Concentration (Chemistry); Diesel engines; Diseases and medical conditions; Fatalities; Infrared radiation; Nitrogen; Oxides; Particles; Physiology; Pollutants; Samples; Temperature; Test procedures
• Uncontrolled Terms: Increase
• ITRD Terms: 2452: Air pollution; 7132: Concentration (chem); 1314: Diesel engine; 2442: Emission; 1602: Fatality; 2134: Illness; 9032: Increase; 6797: Infrared; 7128: Nitrogen; 7372: Oxide; 4511: Particle; 2062: Physiology; 6251: Sample (mater); 6722: Temperature; 6288: Test method
• Subject Areas: Safety and Human Factors;

Filing Info

• Accession Number: 00767113
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Aug 6 1999 12:00AM