Quantitative analysis of nitrate ion in ambient aerosols by Fourier-transform infrared spectroscopy

Abstract

We thank Robert Hyer and Dr. J. D. Helmer for their help in conducting the set II experiments. We also thank T. D. Macy and D. A. Dickson for technical assistance.

Sol-Gel Processing of Silica Nuclear Waste Glasses

“… ions were observed only with the Sr-and Nd-doped silicate gels dried at 70˚C, whereas with the Cs-and Sr-doped gels, only free, non-coordinated nitrate ions were observed instead (ν3 NO 3 at 1384 cm -1 , v. strong and ν1 + ν3 3 NO  at 2360 cm -1 , v. weak), which is in accord with the observations of Bogard et al [19]. Free nitrate ions were observed with all samples heated at 450˚C and their traces appeared even at 800˚C with Sr or Nd dopants present.…”

Fourier Transform Infrared Spectroscopy of Aerosol Collected in a Low Pressure Impactor (LPI/FTIR): Method Development and Field Calibration

“…The nitrate ions in NaNO, also absorbed at 835 cm-' and were included in total nitrate ion quantifications. Molar absorptivities of the nitrate ion in the 818-838 cm-' region were relatively constant for the nitrate salts of ammonium, potassium, sodium, calcium, and magnesium (Bogard et al, 1982). Sodium nitrate had previously been found together with ammonium nitrate in 3.3-11 p m aerosols (Kadowaki, 1977;Wall et al, 1988).…”

“…Infrared spectroscopy was used extensively in the 1970s and early 1980s to probe the composition of atmospheric aerosol (Blanco and McIntyre, 1972;Cunningham et al, 1974Cunningham et al, , 1976Kellner, 1978;Bogard et al, 1982); however, these methods were largely abandoned because of difficult sample collection, lack of sensitivity, and the semiquantitative nature of infrared spectra. Recent advances in infrared optics and detectors have now overcome many of these problems and it is now possible to directly analyze picogram quantities of sample with little or no sample preparation (Kellner and Malissa, 1989).…”

Atmospheric particulate matter characterization by Fourier transform infrared spectroscopy: a review of statistical calibration strategies for carbonaceous aerosol quantification in US measurement networks

“…In this approach, the observed absorption is related to a reference measurement (typically gravimetric mass) of the compounds on the substrate. In this way, calibration of nitrate and sulfate salts (Cunningham et al, 1974;Cunningham and Johnson, 1976;Bogard et al, 1982;McClenny et al, 1985;McClenny, 1992, 1994;Pollard et al, 1990;Tsai and Kuo, 2006;Reff et al, 2007), silica dust (Foster and Walker, 1984;Weakley et al, 2014;Wei et al, 2017), and organic functional groups (Allen and Palen, 1989;Paulson et al, 1990;Pickle et al, 1990;Mylonas et al, 1991;Palen et al, 1992Palen et al, , 1993Holes et al, 1997;Blando et al, 1998;Maria et al, 2002Maria et al, , 2003Sax et al, 2005;Gilardoni et al, 2007;Reff et al, 2007;Coury and Dillner, 2008;Day et al, 2010;Takahama et al, 2013;Faber et al, 2017) has been studied. The organic carbon and organic aerosol mass reconstructed has typically ranged between 70 % and 100 % when compared with collocated evolved-gas analysis or mass spectrometry measurements (Russell et al, 2009;Corrigan et al, 2013), though many model uncertainties remain.…”