Diffuse reflectance Fourier-transform spectroscopy

In this contribution, the steady-state isotopic transient kinetic analysis-diffuse reflectance Fourier transform spectroscopy (SSITKA-DRIFTS) method provides further support to the conclusion that not only are infrared active formates likely intermediates in the water-gas shift (WGS) reaction, in agreement with the mechanism proposed by Shido and Iwasawa for Rh/ceria, but designing catalysts based on formate C-H bond weakening can lead to significantly higher... [Pg.365]

Diffuse-reflection Fourier-transform infrared spectroscopy, 41 6, 8... [Pg.90]

Another similar study of crystallization was performed where on-line ATR-FTIR spectroscopy was used to provide concentration information, however on-line diffuse reflectance Fourier-transform infrared... [Pg.442]

Because chemical and structural properties of natural and artificial gems are very similar in this case, the possibilities of Raman and LIBS methods are rather limited. It was found that another laser-based techniques could be very effective for rapid spectroscopic discrimination between natural and synthetic emeralds, rubies, and alexandrite (Armstrong et al. 2000a,b). The first one is DRIFTS (Diffuse Reflectance Fourier Transformed Infra-Red Spectroscopy)... [Pg.320]

Gordon, R. J., N. J. Trivedi, B. P. Singh, and E. C. Ellis, Characterization of Aerosol Organics by Diffuse Reflectance Fourier Transform Infrared Spectroscopy, Environ. Sci. Technol., 22, 672-677 (1988). [Pg.426]

F. Diffuse-Reflection (Fourier-Transform) Infrared Spectroscopy (DRIFTS) (18)... [Pg.6]

Niemeyer, J., Chen, Y., and Bollag, J. M. (1992). Characterization of humic acids, composts, and peat by diffuse reflectance Fourier-transform infrared spectroscopy. Soil Sci. Soc. Am. J. 56,135-140. [Pg.723]

The introduction of Fourier Transform Infrared Spectroscopy (FTIR) brought along a number of typical solid sample techniques. DRIFTS (Diffuse Reflectance Fourier Transform Infrared Spectroscopy) is probably most commonly known. Another technique, developed specifically for measuring solid, opaque samples is PAS (Photo Acoustic Spectroscopy). This accessory is less known, probably due to its high cost and its rather difficult modus operandi. [Pg.491]

Kolboe and Ellefsen (1962) and Michell et al. (1965) provided preliminary results indicating the feasibility of employing infrared spectroscopy to determine the lignin content of finely ground wood and pulp samples embedded in potassium chloride. Further development and refinement of this technique have led to methods for determination of lignin based on multiple internal reflectance infrared spectrometry (Marton and Sparks 1967) and diffuse reflectance Fourier transform spectrometry (Schultz et al. 1985). Lignin contents have also estimated by 13C CP/MAS/NMR spectrometry (Haw et al. 1984, Hemmingson and Newman 1985) (see Chap. 4.5). [Pg.43]

Berben SA, Rademacher JP, Sell LO, Easty DB (1987) Estimation of lignin in wood pulp by diffuse reflectance Fourier-transform infrared spectrometry Tappi J 70(11) 129-133 Birkett M, Gambino M, Meyer JH, Egers D (1989) Estimation of kappa number of pulps by near-infrared spectroscopy Tappi J 72(9) 193-197 Bracewell R (1965) The Fourier transformation and its applications McGraw-Hill, New York, 381 pp... [Pg.106]

Ferraro JR, Basile LJ (1978) Fourier transform infrared application to national problems In Ferraro JR, Basile U (eds) Fourier transform infrared spectroscopy - applications to chemical systems, Vol 4 Academic Press, New York, 275-302 Ferraro JR, Rein AJ (1985) Application of diffuse reflectance spectroscopy in the far-infrared region In Ferraro JR, Basile LJ (eds) Fourier transform infrared spectroscopy -applications to chemical systems, Vol 4 Academic Press, New York, 244-282 Frank IE, Feikema J, Constantine N, Kowalski BR (1984) Prediction of product quality from spectral data using the partial least squares method J Chem Inf Comput Sci 24 20-24 Fuller MP, Griffiths PR (1980) Infrared microsampling by diffuse reflectance Fourier transform spectrometry Appl Spectrosc 34 533-539... [Pg.106]

Ostmeyer JG, Elder TJ, Winandy JE (1989) Spectroscopic analysis of southern pine treated with chromated copper arsenate II. Diffuse-reflectance Fourier-transform infrared spectroscopy (DRIFT). J Wood Chem Technol 9 105-122 Owen NL, Thomas DW (1989) Infrared studies of hard and soft" woods. Appl Spectrosc 43 451-455... [Pg.69]

Using diffuse reflectance Fourier transform infrared spectroscopy, Adhikari et al. studied the binding of oleic acid (88), triacylglycerol (89), and phosphatidylcholine (90) on silica gel at room temperature. Their interpretation was that oleic acid and triacylglycerols bind to silica surface hydroxyls via hydrogen bonding interactions between the carboxylate and ester carbonyls of these molecules, respectively. In contrast, phospholipids hydrogen bond to silica surface hydroxyls via the phosphate... [Pg.2713]

Experimentally, IR spectroscopy can be accomplished in a number of ways by Nujol mull, KBr disc or the diffuse reflectance technique. In the KBr disc technique, the compound is mixed with KBr and compressed into a disc using a press and die. This can be a disadvantage if the compound undergoes a polymorphic transformation under pressure (see Chan and Doelker, 1985). One way to overcome this problem is to use the diffuse reflectance Fourier transform (DRIFT) technique, whereby a few milligrams of compound is dispersed in approximately 250 mg of KBr and the spectrum obtained by reflection from the surface. [Pg.73]

Discussions of old and new techniques used to study the surface of silica, including diffuse reflectance Fourier transform (DRIFT) infrared spectroscopy, 29Si cross polarization magic-angle nuclear magnetic resonance (CP MAS NMR) spectroscopy, as pioneered by Maciel and Sindorf... [Pg.34]

Variable-temperature diffuse reflectance Fourier transform infrared spectroscopy provided qualitative and quantitative information concerning the acidity of surface sites on silica. Although the use of pyridine as a probe has been well known for many years, the ability of the technique to permit... [Pg.262]

The samples were characterized by X-ray diffraction (XRD) transmission and high-resolution electron microscopy (TEM and HREM) microelectrophoresis X-ray photoelectron spectroscopy (XPS), also known as electron spectroscopy for chemical analysis (ESCA) secondary ion mass spectrometry (SIMS) and diffuse reflectance Fourier transform (DRIFT) infrared absorption spectroscopy. [Pg.544]

See Silicon-aluminum interactions in biology Alzheimer s disease, role of aluminum, 606 Amine desorption, variable-temperature diffuse reflectance Fourier transform infrared (FTIR) spectroscopy from siliceous surface, 257-266 Amine-stabilized sol, manufacturing... [Pg.651]

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