%0 Journal Article %1 Bruns:2010p2793 %A Bruns, Emily A %A Perraud, Veronique %A Zelenyuk, Alla %A Ezell, Michael J %A Johnson, Stanley N %A Yu, Yong %A Imre, Dan %A Finlayson-Pitts, Barbara J %A Alexander, M. Lizabeth %D 2010 %J Environmental Science & Technology %K Aerosol Alkenes, Alpha-Pinene, Atmospheric Chemistry, Distributions, Formation, High-Resolution, Infrared-Analysis, Linear No3 Radical-Initiated Radicals Reactions, Size Transform Vapor-Pressures, %N 3 %P 1056--1061 %R 10.1021/es9029864 %T Comparison of FTIR and Particle Mass Spectrometry for the Measurement of Particulate Organic Nitrates %U http://pubs.acs.org/doi/abs/10.1021/es9029864 %V 44 %X While multifunctional organic nitrates are formed during the atmospheric oxidation of volatile organic compounds, relatively little is known about their signatures in particle mass spectrometers. High resolution time-of-flight aerosol mass spectrometry (HR-ToF-AMS) and FTIR spectroscopy on particles impacted on ZnSe windows were applied to NH4NO3, NaNO3, and isosorbide 5-mononitrate (IMN) particles, and to secondary organic aerosol (SOA) from NO3 radical reactions at 22 degrees C and 1 atm in air with alpha- and beta-pinene, 3-carene, limonene, and isoprene. For comparison, single particle laser ablation mass spectra (SPLAT II) were also obtained for IMN and SOA from the alpha-pinene reaction. The mass spectra of all particles exhibit significant intensity at m/z30, and for the SOA, weak peaks corresponding to various organic fragments containing nitrogen CxHyNzO8(+) were identified using HR-ToF-AMS. The NO+/NO2+ ratios from HR-ToF-AMS were 10-15 for IMN and the SOA from the alpha- and beta-pinene, 3-carene, and limonene reactions, similar to 5 for the isoprene reaction, 2.4 for NH4NO3 and 80 for NaNO3. The N/H ratios from HR-ToF-AMS for the SOA were smaller by a factor of 2 to 4 than the -ONO2/C-H ratios measured using FTIR. FTIR has the advantage that it provides identification and quantification of functional groups. The NO+/NO2+ ratio from HR-ToF-AMS can indicate organic nitrates if they are present at more than 15-60% of the inorganic nitrate, depending on whether the latter is NH4NO3 or NaNO3. However, unique identification of specific organic nitrates is not possible with either method.

@article{Bruns:2010p2793, abstract = {While multifunctional organic nitrates are formed during the atmospheric oxidation of volatile organic compounds, relatively little is known about their signatures in particle mass spectrometers. High resolution time-of-flight aerosol mass spectrometry (HR-ToF-AMS) and FTIR spectroscopy on particles impacted on ZnSe windows were applied to NH4NO3, NaNO3, and isosorbide 5-mononitrate (IMN) particles, and to secondary organic aerosol (SOA) from NO3 radical reactions at 22 degrees C and 1 atm in air with alpha- and beta-pinene, 3-carene, limonene, and isoprene. For comparison, single particle laser ablation mass spectra (SPLAT II) were also obtained for IMN and SOA from the alpha-pinene reaction. The mass spectra of all particles exhibit significant intensity at m/z30, and for the SOA, weak peaks corresponding to various organic fragments containing nitrogen [CxHyNzO8](+) were identified using HR-ToF-AMS. The NO+/NO2+ ratios from HR-ToF-AMS were 10-15 for IMN and the SOA from the alpha- and beta-pinene, 3-carene, and limonene reactions, similar to 5 for the isoprene reaction, 2.4 for NH4NO3 and 80 for NaNO3. The N/H ratios from HR-ToF-AMS for the SOA were smaller by a factor of 2 to 4 than the -ONO2/C-H ratios measured using FTIR. FTIR has the advantage that it provides identification and quantification of functional groups. The NO+/NO2+ ratio from HR-ToF-AMS can indicate organic nitrates if they are present at more than 15-60% of the inorganic nitrate, depending on whether the latter is NH4NO3 or NaNO3. However, unique identification of specific organic nitrates is not possible with either method.}, added-at = {2010-06-22T19:38:37.000+0200}, affiliation = {Univ Calif Irvine, Dept Chem, Irvine, CA 92697 USA}, author = {Bruns, Emily A and Perraud, Veronique and Zelenyuk, Alla and Ezell, Michael J and Johnson, Stanley N and Yu, Yong and Imre, Dan and Finlayson-Pitts, Barbara J and Alexander, M. Lizabeth}, biburl = {https://www.bibsonomy.org/bibtex/20eb9bb4726edec78f113bda65c3226c8/gsmith}, date-added = {2010-04-08 09:47:34 -0400}, date-modified = {2010-04-12 15:36:29 -0400}, doi = {10.1021/es9029864}, interhash = {bd1654363b35a4febe7a0b274e0b8603}, intrahash = {0eb9bb4726edec78f113bda65c3226c8}, journal = {Environmental Science {\&} Technology}, keywords = {Aerosol Alkenes, Alpha-Pinene, Atmospheric Chemistry, Distributions, Formation, High-Resolution, Infrared-Analysis, Linear No3 Radical-Initiated Radicals Reactions, Size Transform Vapor-Pressures,}, language = {English}, local-url = {file://localhost/Users/geoffreysmith/Documents/Papers/Environmental%20Science%20&%20Technology/2010/Environmental%20Science%20&%20Technology,%2044,%201056-1061%202010.pdf}, month = Jan, number = 3, pages = {1056--1061}, pmid = {000273950100034}, rating = {0}, read = {Yes}, timestamp = {2010-06-22T19:39:36.000+0200}, title = {Comparison of FTIR and Particle Mass Spectrometry for the Measurement of Particulate Organic Nitrates}, uri = {papers://E88B624E-D406-46FF-9D95-BB9C1AAE3FDC/Paper/p2793}, url = {http://pubs.acs.org/doi/abs/10.1021/es9029864}, volume = 44, year = 2010 }