Diffuse reflectance infrared spectroscop

The Nature of Adsorption Sites on Unrefined and Ball Milled Kaolin. A Diffuse Reflectance Infrared Fourier Transform Spectroscopic Study... [Pg.81]

Vogt, R., and B. J. Finlayson-Pitts, A Diffuse Reflectance Infrared Fourier Transform Spectroscopic (DRIFTS) Study of the Surface Reaction of NaCI with Gaseous N02 and UNO, J. Phys. Chem., 98, 3747-3755 (1994) J. Phys. Chem., 99, 13052 (1995). [Pg.178]

A new rapid mid-infrared spectroscopic method called diffuse reflectance infrared Fourier transform spectra (DRIFTS), coupled with chemometrics, has been developed by Janik, Merry, and Skjemstad (1998) and routinely applied to rapidly screen and compare crime scene samples (Figure 1.1). Added to these rapid methods and techniques are the use of rapid mass and volume magnetic susceptibility methods, which should also always be used before moving to the more costly methods (Figure 1.1). Mineral magnetic techniques are a relatively recent development (post-1971) and have now become a very powerful and widely used research tool to characterize natural materials in landscapes (e.g., Thompson and Oldfield 1986). [Pg.21]

Generally speaking, the methods used to characterize carbonaceous material surfaces are referred to as wet and dry techniques. The former include potentiometric titrations and zeta potential or electrochemical methods the latter include temperature-programmed desorption (TPD) and spectroscopic methods such as x-ray photoelectron spectroscopy (XPS) and diffuse reflectance infrared spectroscopy (DRIFT). [Pg.58]

In situ FTIR and diffuse reflectance infrared Fourier transform spectroscopic (DRIFTS) studies deal mainly with photocatalytic oxidation or reduction of nitric oxide (NO) as important pollutant and green house gas as well as the depollution or selective oxidation of organics such as olefinic, aliphatic, aromatic, and oxygenated hydrocarbons. [Pg.66]

MES-PSD can be used in conjunction with any spectroscopic technique, including attenuated total reflectance infrared spectroscopy (ATR-IR), diffuse reflectance infrared flourier transform... [Pg.121]

Grap, R.T., Koenig, J.L. and Ishida, H. (1985). Diffuse reflectance fourier transform infrared spectroscopic study of chemical bonding and hydrothermal stability of an aminosilane on metal oxide surfaces. J. Adhesion 18, 93-110. [Pg.39]

Unlike classical analytical spectroscopy performed on liquids or dilute solutions of analytes, diffuse reflectance measurement in the near-infrared must deal with a composite effect of spectroscopic absorption and scattering from the analyte and the matrix in which it is found. Differences in refractive indices of the sample material, specular reflection and observance of relatively small differences are all dealt with in this technique. [Pg.272]

One indication of the developing interest in PATs in the pharmaceutical area is the number of book chapters and review articles in this field that have appeared in the last few years. Several chapters in The Handbook of Vibrational Spectroscopy3 are related to the use of various optical spectroscopies in pharmaceutical development and manufacturing. Warman and Hammond also cover spectroscopic techniques extensively in their chapter titled Process Analysis in the Pharmaceutical Industry in the text Pharmaceutical Analysis.4 Pharmaceutical applications are included in an exhaustive review of near-infrared (NIR) and mid-infrared (mid-IR) by Workman,5 as well as the periodic applications reviews of Process Analytical Chemistry and Pharmaceutical Science in the journal Analytical Chemistry. The Encyclopedia of Pharmaceutical Technology has several chapters on spectroscopic methods of analysis, with the chapters on Diffuse Reflectance and Near-Infrared Spectrometry particularly highlighting on-line applications. There are an ever-expanding number of recent reviews on pharmaceutical applications, and a few examples are cited for Raman,7 8 NIR,9-11 and mid-IR.12... [Pg.331]

Ostmeyer JG, Elder TJ, Winandy JE (1989) Spectroscopic analysis of southern pine treated with chromated copper arsenate II Diffuse-reflectance Founer-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.108]

In conclusion, it can be stated that spectroscopic techniques will further dominate the analytical tools of the future with respect to qualitative and quantitative assays. This is because of their speed and the enormous information content of the spectra, especially in the infrared, and the fact that reagent-free multicomponent methodologies are available. The widespread diffuse reflection technique certainly has to compete with others in the laboratory and at the production site. However, for the study of bulk and dispersed systems, it will often be the method of choice. There are additional developments concerned with dedicated instruments and user-friendly interfaces, in which che-mometrics play an important role. It is hoped that the sophisticated algorithms presented in the literature will... [Pg.3384]

Spectroscopic Methods of Analysis Diffuse Reflectance Spectroscopy / 3375 Spectroscopic Methods of Analysis Fluorescence Spectroscopy / 3387 Spectroscopic Methods of Analysis Infrared Spectroscopy / 3405 Spectroscopic Methods of Analysis Mass Spectrometry / 3419 Spectroscopic Methods of Analysis Near-Infrared Spectrometry / 3434 Spectroscopic Methods of Analysis Nuclear Magnetic Resonance Spectroscopy / 3440... [Pg.4299]

G. E. Ritchie, L. Gehrlein, and E. W. Ciurczak, Simultaneous Development, Validation and Implementation of a Near-Infrared (NIR) Diffuse Reflectance Spectroscopic Identification Method For Pharmaceutically Active And Inactive (Placebo) Clinical Dosage Forms, Proc. PittCon, New Orleans, March, 2000. [Pg.138]

Ritchie, G. E., Gehrlein, L., and Ciurczak, E. W. Simultaneous development, validation and implementation of a near-infrared (NIR) diffuse reflectance spectroscopic identification method for pharmaceutically active and inactive (placebo) clinical dosage forms. In Pittsburgh Conference of Analytical Chemistry and Applied Spectroscopy, March 2000, New Orleans, LA. [Pg.265]

Variable-Temperature Diffuse Reflectance Fourier Transform Infrared Spectroscopic Studies of Amine Desorption from a Siliceous Surface... [Pg.254]

J.G. Highfield, P. Bowen, Diffuse-Reflectance Fourier Transform Infrared Spectroscopic Studies of the Stability of Aluminum Nitride powder in an Aqueous Environment, Anal. Chem., 61 (1989) 2399. [Pg.47]

Highfield, J. G., and Bowen, P., Diffuse-reflectance Fourier transform infrared spectroscopic studies of the stability of aluminum nitride powder in an aqueous environment, Anal. Chem., 61, 2399 (1989). [Pg.152]