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Author Tso, T. -L ♦ Leu, M. -T
Source J-STAGE
Content type Text
Publisher The Japan Society for Analytical Chemistry
Language English
Subject Keyword Infrared absorptivity ♦ nitric acid ice ♦ polar stratospheric cloud ♦ remote sensing ♦ Fourier-transform infrared spectroscopy
Abstract The infrared absorptivities of nitric acid ices formed from vapors containing water and nitric acid were investigated by means of a Fourier-transform infrared spectrometer operated at a wavelength resolution of $1.0cm^{-1}$ (triangular apodization). The solid films were prepared on the surface of a gold-coated, polished copper plate at a temperature of 153 K to 198 K. After collecting the infrared spectra, the substrates were vaporized and condensed into a U-tube for quantitative analyses of $H_{2}O$ and $HNO_{3}$ using a quadrupole mass spectrometer. Amorphous forms of nitric acid ices and four crystalline hydrates (nitric acid monohydrate (NAM), nitric acid dihydrate (NAD), and nitric acid trihydrate (both α-NAT and β-NAT forms)) were identified and their infrared absorptivities measured. The infrared spectra were interpreted in terms of the known spectra of oxonium and nitrate ions. Possible implications for remote sensing and the analysis of polar stratospheric clouds using these infrared spectra are discussed.
ISSN 09106340
Learning Resource Type Article
Publisher Date 1996-08-10
e-ISSN 13482246
Journal Analytical Sciences(analsci1985)
Volume Number 12
Issue Number 4
Page Count 8
Starting Page 615
Ending Page 622


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