Using Fourier transform infrared absorption spectrometry to probe the injected neutral gas in a plasma having a high ionization fraction

1993 ◽  
Vol 11 (3) ◽  
pp. 689-693 ◽  
Author(s):  
M. J. Goeckner ◽  
R. A. Breun
Keyword(s):  
Fourier Transform ◽  
Infrared Absorption ◽  
Fourier Transform Infrared ◽  
Absorption Spectrometry ◽  
Neutral Gas ◽  
High Ionization ◽  
Ionization Fraction ◽  
Infrared Absorption Spectrometry

Estimation of the Octane Number of Automobile Gasoline by Fourier Transform Infrared Absorption Spectrometry

1992 ◽  
Vol 46 (6) ◽  
pp. 966-971 ◽  
Author(s):  
M. Ichikawa ◽  
N. Nonaka ◽  
I. Takada ◽  
S. Ishimori
Keyword(s):  
Fourier Transform ◽  
Ir Spectra ◽  
Infrared Absorption ◽  
Octane Number ◽  
Fourier Transform Infrared ◽  
Absorption Spectrometry ◽  
Regression Equation ◽  
Automobile Gasoline ◽  
Stretching Vibration ◽  
Infrared Absorption Spectrometry

A method to estimate the octane number of automobile gasoline by Fourier transform infrared absorption spectrometry has been studied. Thirty-six kinds of regular gasoline and 38 of unleaded premium gasoline, collected from the market from winter to summer, were used as samples, and the absorptions of the C-H stretching vibration in the 3150-2800 cm−1 range of their IR spectra were used to plot each sample in a two-dimensional space, followed by an attempt to graphically classify the two broad types. On the other hand, the IR spectra of other samples with known octane numbers (88.0 to 100.8 in octane number) and, on that basis, samples with known octane numbers, were mapped into the space in which the regular gasolines and the premium gasolines were classified to determine their dispersion in this space. A further attempt was made to formulate a linear regression equation for use in octane number estimation. As a result, it was found that regular and premium gasolines could be definitely distinguished from each other according to the C-H stretching vibration in the 3150-2800 cm−1 near-infrared range, and that the octane number could be visually estimated. The formulation of a satisfactory regression equation was also made possible. These results are reported.

scholarly journals Production and Characterization of Oxyhydroxyapatites

2018 ◽  
Vol 762 ◽  
pp. 48-53
Author(s):  
Liene Pluduma ◽  
Karlis Agris Gross ◽  
Christian Rey ◽  
Arnolds Ubelis ◽  
Astrida Berzina
Keyword(s):  
Fourier Transform ◽  
Detailed Analysis ◽  
Absorption Line ◽  
Infrared Absorption ◽  
Fourier Transform Infrared ◽  
Peak Shift ◽  
Ion Absorption ◽  
Hydroxyl Ion

The amount and alignment of hydroxyl ions influence the bioactivity of hydroxyapatite. Hydroxyl ions in hydroxyapatite are the most mobile and upon heating are the first to leave the lattice to form oxyhydroxyapatite. This work describes a method for producing hydroxyapatite with different amounts of hydroxyl ions, and reports on the changes in Fourier transform infrared absorption at increasing level of dehydroxylation. Detailed analysis of spectra in the 500 – 700 cm-1 range showed a peak shift for the hydroxyl ion absorption line at 632 cm-1 to 637 cm-1 and an increase in the wavenumber for the phosphate line at 575 cm-1.

Fourier-Transform Infrared Absorption Spectroscopy of Chromium Nitride Thin Film

2011 ◽  
Vol 50 ◽  
pp. 01BE03 ◽  
Author(s):  
Jun Shirahata ◽  
Tetsutaro Ohori ◽  
Hiroki Asami ◽  
Tsuneo Suzuki ◽  
Tadachika Nakayama ◽  
...  
Keyword(s):  
Thin Film ◽  
Fourier Transform ◽  
Absorption Spectroscopy ◽  
Infrared Absorption ◽  
Fourier Transform Infrared ◽  
Chromium Nitride ◽  
Infrared Absorption Spectroscopy
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