Record Display for the EPA National Library Catalog


Main Title FTIR (Fourier Transform Infrared) Transmission Spectrometry for the Nondestructive Determination of Ammonium and Sulfate in Ambient Aerosols Collected on Teflon Filters.
Author McClenny, W. A. ; Childers, J. W. ; Roehl, R. ; Palmer, R. A. ;
CORP Author Environmental Monitoring Systems Lab., Research Triangle Park, NC. ;Duke Univ., Durham, NC. Paul M. Gross Chemical Lab.
Year Published 1985
Report Number EPA/600/J-85/272;
Stock Number PB86-157807
Additional Subjects Infrared spectroscopy ; Hazardous materials ; Chemical analysis ; Particles ; Sulfates ; Ammonium ; Aerosols ; Reprints ; Fourier transform spectroscopy ; Air pollution detection
Library Call Number Additional Info Location Last
NTIS  PB86-157807 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 10p
Fourier transform infrared transmission spectroscopy is used to analyze directly for sulfate and ammonium present in ambient aerosol particles deposited on Teflon filters. Integrated infrared peak areas for sulfate and ammonium are linearly related to x-ray fluorescence measurements for total sulfur. The detection limit, in terms of total sulfur, is 450 ng/cu.m. using samples volumes of 21.6 cu.m. The actual detection limit may be less since uncertainties of 5-8% occur in the x-ray fluorescence measurements and all sulfur may not be in the form of ammonium sulfate. In order to determine the influence of site-dependent variations in collected particles on the infrared measurement, samples from four widely different sites were analyzed.