10.6084/m9.figshare.942507.v3
Brent J. Williams
Brent
J. Williams
John T. Jayne
John T.
Jayne
Andrew T. Lambe
Andrew T.
Lambe
Thorsten Hohaus
Thorsten
Hohaus
Joel R. Kimmel
Joel R.
Kimmel
Donna Sueper
Donna
Sueper
William Brooks
William
Brooks
Leah R. Williams
Leah R.
Williams
Achim M. Trimborn
Achim
M. Trimborn
Raul E. Martinez
Raul
E. Martinez
Patrick L. Hayes
Patrick L.
Hayes
Jose L. Jimenez
Jose L.
Jimenez
Nathan M. Kreisberg
Nathan M.
Kreisberg
Susanne V. Hering
Susanne V.
Hering
David R. Worton
David R.
Worton
Allen H. Goldstein
Allen
H. Goldstein
Douglas R. Worsnop
Douglas R.
Worsnop
The First Combined Thermal Desorption Aerosol Gas Chromatograph—Aerosol Mass Spectrometer (TAG-AMS)
Taylor & Francis Group
2014
thermal
desorption
aerosol
spectrometer
2014-03-21 15:58:34
Journal contribution
https://tandf.figshare.com/articles/journal_contribution/The_First_Combined_Thermal_Desorption_Aerosol_Gas_Chromatograph_8212_Aerosol_Mass_Spectrometer_TAG_AMS_/942507
<div><p>To address the critical need for improving the chemical characterization of the organic composition of ambient particulate matter, we introduce a combined thermal desorption aerosol gas chromatograph—aerosol mass spectrometer (TAG-AMS). The TAG system provides <i>in-situ</i> speciation of organic chemicals in ambient aerosol particles with hourly time resolution for marker compounds indicative of sources and transformation processes. However, by itself the TAG cannot separate by particle size and it typically speciates and quantifies only a fraction of the organic aerosol (OA) mass. The AMS is a real-time, <i>in-situ</i> instrument that provides quantitative size distributions and mass loadings for ambient fine OA and major inorganic fractions; however, by itself the AMS has limited ability for identification of individual organic compounds due to the electron impact ionization detection scheme used without prior molecular separation.</p>
<p>The combined TAG-AMS system provides real-time detection by AMS followed by semicontinuous analysis of the TAG sample that was acquired during AMS operation, achieving simultaneous and complementary measurements of quantitative organic mass loading and detailed organic speciation. We have employed a high-resolution time-of-flight mass spectrometer (HR-ToF-MS) to enable elemental-level determination of OA oxidation state as measured on the AMS, and to allow improved compound identification and separation of unresolved complex mixtures (UCM) measured on the TAG. The TAG-AMS interface has been developed as an upgrade for existing AMS systems. Such measurements will improve the identification of organic constituents of ambient aerosol and contribute to the ability of atmospheric chemistry models to predict ambient aerosol composition and loadings.</p>
<p>Copyright 2014 American Association for Aerosol Research</p>
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