Investigation of the state of palladium in the potassium palladium-11-tungstosilicate/alumina system by diffuse-reflectance IR spectroscopy

1999 ◽  
Vol 48 (7) ◽  
pp. 1261-1265 ◽  
Author(s):  
P. A. Korovchenko ◽  
R. A. Gazarov ◽  
A. Yu. Stakheev ◽  
L. M. Kustov
Keyword(s):  
Ir Spectroscopy ◽  
Diffuse Reflectance ◽  
The State

The state of platinum in the potassium platinum-11-tungstosilicate system on alumina studied by diffuse-reflectance IR spectroscopy

2003 ◽  
Vol 52 (11) ◽  
pp. 2376-2381 ◽  
Author(s):  
P. A. Korovchenko ◽  
N. A. Vladimirov ◽  
R. A. Gazarov ◽  
L. M. Kustov
Keyword(s):  
Ir Spectroscopy ◽  
Diffuse Reflectance ◽  
The State

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.

Influence of KBr conditioning on the infrared hydroxyl-stretching region of saponites

Clay Minerals ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 439-445 ◽  
Author(s):  
M. Pelletier ◽  
L. J. Michot ◽  
O. Barrès ◽  
B. Humbert ◽  
S. Petit ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Ir Spectra ◽  
Clay Minerals ◽  
Diffuse Reflectance ◽  
Layer Charge ◽  
Tetrahedral Sheet ◽  
Stretching Vibration ◽  
Sheet Charge

AbstractIn order to assess the influence of tetrahedral sheet charge on the hydroxyl-stretching vibration in clay minerals, a series of synthetic Na-saponites, with increasing layer charge, was studied by infrared (IR) spectroscopy. When recorded after KBr dilution either in transmission or diffuse reflectance, the IR spectra exhibit a component at ~3710 cm-1, the intensity of which increases linearly with increasing layer charge. When experiments are carried out without any dilution of the samples, this component is not observed, suggesting a Na+/K+ exchange upon mixing of the sample with KBr. The spectra obtained for K-saponite confirm this exchange. This shows that the dilution procedure can lead to serious misinterpretations of IR spectra in the OH-stretching region.

New Method for Pollen Identification by FT-IR Spectroscopy

2003 ◽  
Vol 57 (1) ◽  
pp. 23-27 ◽  
Author(s):  
C. S. Pappas ◽  
P. A. Tarantilis ◽  
P. C. Harizanis ◽  
M. G. Polissiou
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Diffuse Reflectance ◽  
Pollen Grains ◽  
Comparison Method ◽  
Plant Origin ◽  
The Family ◽  
Ft Ir ◽  
Diffuse Reflectance Infrared ◽  
Ft Ir Spectroscopy

A new methodology for identification of pollen was developed based on FT-IR spectroscopy. Pollen samples of twenty different plant species were collected and the diffuse reflectance infrared Fourier transform (DRIFTS) and KBr pellet spectra were recorded. Libraries of spectra were created. Spectra of unknown plant origin pollen were recorded and compared with those of the corresponding pollen library and the match value was measured automatically using the appropriate software (OMINC ver. 3.1). From the same pollen samples, microscopic slides were prepared and the photographs of the pollen grains were used as a second comparison method. Using light microscopy, the pollen identification is usually limited to the family or generic name, while FT-IR spectroscopy can distinguish species belonging to the same genus. This method is simple and fast, and when the DRIFTS technique is used the sample is not destroyed.

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