Quantitative Fourier-Domain Analysis. Part II: Determination of Boundary Conditions

1992 ◽  
Vol 46 (11) ◽  
pp. 1711-1718 ◽  
Author(s):  
Stephen L. Monfre ◽  
Steven D. Brown
Keyword(s):  
Boundary Conditions ◽  
Synthetic Data ◽  
Chemical System ◽  
Fourier Domain ◽  
Data Set ◽  
New Approach ◽  
Multicomponent Sample ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

A new approach for determining the boundary conditions of a Fourier-domain data set prior to performing quantitative multicomponent analysis has been developed. Processing boundary conditions were determined by calculating the condition number of the calibration matrix which contains the models used to describe the chemical system being studied. Once the boundary conditions for the Fourier-domain data set were determined, the Kalman filter was used to estimate the concentration of individual components in a multicomponent sample. Synthetic data were first analyzed to determine both the feasibility of the data-analysis method and the effect that background variations would have on the concentration estimates. Raw interferograms of multicomponent samples, collected with the use of Fourier transform infrared (FT-IR) spectroscopy, were also analyzed. Validation samples were analyzed to verify the chosen boundary conditions.

Applications of Diffuse Reflectance FT-IR to Pigment Photodecomposition in Paint

1982 ◽  
Vol 36 (2) ◽  
pp. 155-157 ◽  
Author(s):  
D. B. Chase ◽  
R. L. Amey ◽  
W. G. Holtje
Keyword(s):  
Ir Spectroscopy ◽  
Infrared Spectra ◽  
Diffuse Reflectance ◽  
Spectral Subtraction ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Diffuse reflectance FT-IR spectroscopy is used to obtain infrared spectra of paints directly on paper panels. The binder contribution to the spectrum can be effectively eliminated by spectral subtraction and the spectra of photodecomposition products are obtained. Comparison with reference spectra allows the determination of the photodecomposition mechanism.

Reagentless determination of glucose and other constituents in blood by ATR-FT-IR-spectroscopy.

1989 ◽  
Vol 35 (9) ◽  
pp. 1854-1856 ◽  
Author(s):  
J D Kruse-Jarres ◽  
G Janatsch ◽  
U Gless
Keyword(s):  
Ir Spectroscopy ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Determination of Spore Inactivation during Thermal and Pressure-Assisted Thermal Processing Using FT-IR Spectroscopy

2006 ◽  
Vol 54 (26) ◽  
pp. 10300-10306 ◽  
Author(s):  
Anand Subramanian ◽  
Juhee Ahn ◽  
V. M. Balasubramaniam ◽  
Luis Rodriguez-Saona
Keyword(s):  
Ir Spectroscopy ◽  
Thermal Processing ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Determination of the conformations of intramolecular DNA triple helices by FT-IR spectroscopy: effect of loop length

1995 ◽  
Vol 372 (2-3) ◽  
pp. 241-247 ◽  
Author(s):  
Ye Fang ◽  
Chunli Bai ◽  
Ying Wei ◽  
Youqi Tang ◽  
Shwu-Bin Lin ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Loop Length ◽  
Ft Ir ◽  
Triple Helices ◽  
Ft Ir Spectroscopy

Determination of the Orientation of Adsorbed Pyridine and γ-MPS on Alumina Surface by Photoacoustic FT-IR Spectroscopy

1986 ◽  
Vol 40 (6) ◽  
pp. 851-856 ◽  
Author(s):  
Marek W. Urban ◽  
Jack L. Koenig
Keyword(s):  
Surface Coverage ◽  
Hydroxyl Groups ◽  
Alumina Surface ◽  
Surface Hydroxyl ◽  
Adsorbed Pyridine ◽  
Ft Ir ◽  
Infrared Photoacoustic Spectroscopy ◽  
Pyridinium Ion ◽  
Ft Ir Spectroscopy

Fourier transform infrared photoacoustic spectroscopy has been applied to determine the structure and orientation of pyridine and γ-Metacryl-oxypropyltriethoxysilane (γ-MPS) on γ-Al2O3 surface. Adsorption of pyridine on activated γ-Al2O3 leads to formation of a pyridinium ion (pyN+-H) and pyridine N-oxide. The orientation of pyridinium ion on the alumina surface is random, whereas the pyridine N-oxide is parallel with respect to the surface. The adsorption of oligomers of γ-MPS gives parallel layers on the alumina surface. At low γ-MPS surface coverage, the carbonyl groups interact with the surface hydroxyl groups. Increasing surface coverage leads to an excess of the free C=O species.

Determination of the Integrated Molar Absorptivity for C-ONO and C-NO2 Groups, Using FT-IR Spectroscopy

1986 ◽  
Vol 40 (7) ◽  
pp. 1068-1069 ◽  
Author(s):  
M. S. Akhter ◽  
A. R. Chughtai ◽  
D. M. Smith
Keyword(s):  
Ir Spectroscopy ◽  
Molar Absorptivity ◽  
Ft Ir ◽  
Ft Ir Spectroscopy
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