||FTIR (Fourier Transform Infrared) Transmission Spectrometry for the Nondestructive Determination of Ammonium and Sulfate in Ambient Aerosols Collected on Teflon Filters.
McClenny, W. A. ;
Childers, J. W. ;
Roehl, R. ;
Palmer, R. A. ;
||Environmental Monitoring Systems Lab., Research Triangle Park, NC. ;Duke Univ., Durham, NC. Paul M. Gross Chemical Lab.
Infrared spectroscopy ;
Hazardous materials ;
Chemical analysis ;
Fourier transform spectroscopy ;
Air pollution detection
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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.
||Pub. in Atmospheric Environment, v19 n11 p1891-1898 1985. Prepared in cooperation with Duke Univ., Durham, NC. Paul M. Gross Chemical Lab.
|NTIS Title Notes
||Reprint: FTIR (Fourier Transform Infrared) Transmission Spectrometry for the Nondestructive Determination of Ammonium and Sulfate in Ambient Aerosols Collected on Teflon Filters.
|PUB Date Free Form
||7D; 14B; 99A; 68A
||PC A02/MF A01