Use of cavity ringdown spectroscopy (CRDS) to deliver nitrate radicals for indoor surface chemistry

Details

• Personal Author:
  Flemmer MM ; Ham JE
• Description:
  Cleaning and room deodorizing are common activities that can introduce a number of volatile organic compounds into the indoor environment. Application of these chemicals leads to diffuse gasphase "clouds" and/or adsorption to surfaces also present indoors. These compounds can then react both in the gas phase and/or on surfaces with indoor oxidants such as the nitrate radical (NO3.) resulting in the formation of new chemical species that can be emitted into the indoor environment and affect occupant exposure. In order to simulate real world concentrations (1 - 58 ppt) of nitrate radicals that are expected to be indoors as modelled by Sarwar et al. (Sarwar, 2002) and measured Nojgaard (Nojgaard, 2010), a sensitive absorption technique such as cavity ringdown spectroscopy (CRDS) may be employed. CRDS can be used to deliver accurate NO3. concentrations for gas or surfacephase experiments. Several CRDS measurements of NO3. have been made in the atmospheric environment with instruments having detection limits in the sub ppt range (Ayers, 2005, Brown, 2005). To investigate the reactions of the nitrate radical with aterpineol on a silanized glass surface, a custom CRDS system was developed. This platform will describe the instrument, show NO3. calibration curves from this system, and discuss the preliminary results from aterpineol/ NO3./silanized glass reactions. [Description provided by NIOSH]
• Subjects:
  Air Pollution, Indoor Environmental Exposure Environmental Health Environmental Pollution Nitrates Occupational Health Risk Assessment Risk Factors Safety
• Keywords:
  Aterpineol Author Keywords: Cavity Ringdown Spectroscopy Cleaning-compounds Deodorizers Environmental-exposure Environmental-hazards Exposure-levels Gases Indoor-air-pollution Indoor-environmental-quality Indoor Surface Chemistry Nitrate Radicals Organic-compounds Risk-factors Volatiles

  More +
• ISBN:
  9781627482721
• Publisher:
  International Society of Indoor Air Quality and Climate (ISIAQ)
• Document Type:
  Text
• Genre:
  Proceedings
• Place as Subject:
  California ; OSHA Region 3 ; OSHA Region 6 ; OSHA Region 9 ; Texas ; West Virginia
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  HELD - Health Effects Laboratory Division
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  344-345
• NIOSHTIC Number:
  nn:20043035
• Citation:
  Proceedings of Indoor Air '11, The 12th International Conference on Indoor Air Quality and Climate, June 5-10, 2011, Austin, Texas. Santa Cruz, CA: International Society of Indoor Air Quality and Climate (ISIAQ), 2011 Jun; 1:344-345
• Email:
  Jason.Ham@cdc.hhs.gov
• Federal Fiscal Year:
  2011
• Peer Reviewed:
  False
• Source Full Name:
  Proceedings of Indoor Air '11, The 12th International Conference on Indoor Air Quality and Climate, June 5-10, 2011, Austin, Texas
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:5636b565bd77e710d9a3087994baa77bce34815e036b10c7b35d11ed910803c775d5add26a6f69faa37bd5b9deaa0c3fbe74f82d1bd26112cc0936c3983a2b56
• Download URL:
  https://stacks.cdc.gov/view/cdc/195059/cdc_195059_DS1.pdf
• File Type:
  [PDF - 52.23 KB ]