Formulation Fourier transform infrared spectroscopy

Islam MT, Rodriguez-Hornedo N, Ciotti S, Ackermann C. Fourier transform infrared spectroscopy for the analysis of neutralizer-carbomer and surfactant-carbomer interactions in aqueous, hydroalcoholic, and anhydrous gel formulations. AAPS J 2004 6(4) arti-... 

Fourier Transform Infrared Spectroscopy FTIR Where in the lubricant formulation would you find each of the following ... 

S. J. Prestrelski, T. Arakawa, and J. F. Carpenter, The structure of proteins in lyophilized formulations using Fourier transform infrared spectroscopy, in Formulation and Delivery of Proteins and Peptides, (J. L. Cleland and R. Danger, eds.) American Chemical Society Symposium Series No. 567, 1994, pp. 148-169. 

Fourier transform infrared spectroscopy Propamocarb in emulsifiable pesticide concentrate formulations Quints et al., 2008... 

The second approach is to perform traditional pre-formulational studies using full factorial or Plackett Burman experimental designs [15]. Here, the preferred analytical methodology tends to be thermal and spectroscopic, rather than chromatographic, although the latter methodologies are still utilised. Differential scanning calorimetry (DSC), isothermal calorimetry (ITC) or Fourier-transform infrared (FT-IR) spectroscopy have all been utilised successfully. 

Journal of Vinyl and Additive Technology 5, No.2, June 1999, p.81-6 FOURIER TRANSFORM INFRARED MICRO SPECTROSCOPY MAPPING STUDIES OF WEATHERED PVC CAPSTOCK TYPE FORMULATIONS. II. OUTDOOR WEATHERING IN PENNSYLVANIA Garcia D Black J... 

IR is a nondestructive technique suitable for the analysis of formulated products, and gives a considerable amount of information about the compounds present. Near-infrared (from 13 000 to 4000 cm ) and Fourier transform infrared (FTIR) (from 4000 to 400 cm ) spectroscopies are used. Qualitative analysis of the ethanol soluble fraction allows the identification of functional group types such as hydrotropes (xylenesulfonate and toluenesulfonate). In addition, zeolite, alkalis, polymers, and builders may be identified in the insoluble ethanol fraction. For quantitative analysis, method development is slow because a great number of calibration standards... 

Infrared spectroscopy, including Fourier-transform infrared (FTIR) spectroscopy, is one of the oldest and most widely used analytical techniques in adhesion-related research. Transmission infrared spectroscopy has been used to identify compounds used in formulating adhesives and to follow curing reactions. Attenuated total reflection (ATR) (see Infrared spectroscopy attenuated total reflection) has been used to probe the surface composition of polymers that have been surface modified by an etching process or by deposition of a film. More recently, reflection-absorption infrared spectroscopy (see Infrared spectroscopy RAIR) has been used to characterize thin films on the surfaces of reflecting substrates. 

To identify EVA formulation, degradation and even stabilizer difiusion and consumption, the Fourier Transform Infrared (FTIR) spectroscopy in ATR mode is a simple and satisfying method. The FTIR measurements were carried out with a... 

Infrared (IR) spectroscopy, especially when measured by means of the Fourier transform method (FTIR), is another powerful technique for the physical characterization of pharmaceutical solids [17]. In the IR method, the vibrational modes of a molecule are used to deduce structural information. When studied in the solid, these same vibrations normally are affected by the nature of the structural details of the analyte, thus yielding information useful to the formulation scientist. The FTIR spectra are often used to evaluate the type of polymorphism existing in a drug substance, and they can be very useful in studies of the water contained within a hydrate species. With modem instrumentation, it is straightforward to obtain FTIR spectra of micrometer-sized particles through the use of a microscope fitted with suitable optics. 

An investigation was carried out into the fire retardant behaviour of zinc hydroxystannate-coated fillers (alumina trihydrate and magnesium hydroxide) in PVC and EVA cable formulations. Measurements were made of the limiting oxygen index, peak rate of heat release and smoke parameter and the data for unfilled and filled formulations compared. X-ray photoelectron spectroscopy and diffuse reflectance infrared Fourier-transform spectroscopy were used to study the filler-coating interaction. 16 refs. 

Dreassi, E. Ceramelli, G. Corti, P. Massacesi, M. Perruc-cio, P.L. Quantitative fourier transform near-infrared spectroscopy in the quality control of solid formulations. Analyst 1995, 120, 2361-2365. 

The possibility of evaluating the coupling coefficients using the analogy of multidimensional infrared (IR) spectroscopy [17] was also considered on the basis of the classical formulation shown in Equation 5.3. In the case of the third-order term aiq q2, the coupling coefficient 0C2 corresponds to the off-diagonal peak intensity of the power spectra, /(Qj, 111, - Here, the power spectra associated with multidimensional IR spectroscopy can be calculated via 2D Fourier transform of the following time correlation function ... 

In recent studies about new formulations of the high-temperature catalysts, diffuse reflectance infrared Fourier transform spectroscopy was used to elucidate the reaction mechanism. The results showed that the catalyst surface can provide oxygen to CO even in the absence of water. When the surface comes in contact with water, the surface of the catalyst recovers oxygen. The presence of intermediate species on the catalyst surface was not detected. This suggested that the WGSR over Fe based catalysts proceeds by redox mechanism. 

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