Ozone chemiluminescent detection of olefins: Potential applications for real-time measurements of natural hydrocarbon emissions

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A chemiluminescence analyzer has been constructed that takes advantage of the temperature dependence of the ozone-hydrocarbon reaction. When operated at a temperature of 170 C, the analyzer functions as a total nonmethane hydrocarbon analyzer with sensitivities 10--1,000 times better than a conventional FID. However, with operation at varying temperatures, the chemiluminescent signal reflects the differences in rates of reaction of the hydrocarbons with ozone. Preliminary studies at room temperature indicated that the relative rates of reaction of isoprene, {alpha}-pinene, {beta}-pinene, and limonene with ozone correlated with the observed chemiluminescence signal. When hydrocarbons are grouped in classes of similar structure, their ... continued below

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4 p.

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Marley, N.A.; Gaffney, J.S. & Cunningham, M.M. October 1, 1997.

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Description

A chemiluminescence analyzer has been constructed that takes advantage of the temperature dependence of the ozone-hydrocarbon reaction. When operated at a temperature of 170 C, the analyzer functions as a total nonmethane hydrocarbon analyzer with sensitivities 10--1,000 times better than a conventional FID. However, with operation at varying temperatures, the chemiluminescent signal reflects the differences in rates of reaction of the hydrocarbons with ozone. Preliminary studies at room temperature indicated that the relative rates of reaction of isoprene, {alpha}-pinene, {beta}-pinene, and limonene with ozone correlated with the observed chemiluminescence signal. When hydrocarbons are grouped in classes of similar structure, their rates of reaction with electrophilic atmospheric oxidants (e.g., OH, O{sub 3}, NO{sub 3}) can be correlated with each other. By varying the temperature of the reaction chamber, the chemiluminescence analyzer can be tuned to more reactive classes of hydrocarbons. Therefore, the chemiluminescence analyzer has the ability to determine atmospheric hydrocarbon concentrations as a function of class and will also provide a measure of the atmospheric reactivity of the hydrocarbons.

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4 p.

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OSTI as DE98050538

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  • 10. joint conference on the applications of air pollution meteorology, Phoenix, AZ (United States), 11-16 Jan 1998

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  • Other: DE98050538
  • Report No.: ANL/ER/CP--94819
  • Report No.: CONF-980116--
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 565401
  • Archival Resource Key: ark:/67531/metadc697674

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  • October 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Dec. 16, 2015, 1:04 p.m.

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Marley, N.A.; Gaffney, J.S. & Cunningham, M.M. Ozone chemiluminescent detection of olefins: Potential applications for real-time measurements of natural hydrocarbon emissions, article, October 1, 1997; Illinois. (digital.library.unt.edu/ark:/67531/metadc697674/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.