Fourier transform-near-infrared spectroscopy, 3631

Ulmschneider, M., and Pdnigault, E. (2000b), Direct identification of key-intermediates in containers using Fourier-Transform near-infrared spectroscopy through the protective polyethylene primary packaging, Analusis, 28,136-140. 

Small GW, Arnold MA, Marquardt LA. Strategies for coupling digital filtering with partial least-squares regression application to the determination of glucose in plasma by Fourier-transform near-infrared spectroscopy. Analytical Chemistry 1993, 65, 3279-3289. 

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. 

There are also more recent developments of other dual physio-chemical experimental methods. For example Durand et al (2006) presented a laboratory-made system that allows the coupling of dielectric analysis and Fourier-transform near-infrared spectroscopy (FT-NIR) to follow the cure of polyepoxy reactive systems. Complementary data are provided by the simultaneous dielectric analysis (the vitrification phenomenon) and near-infrared spectroscopic analysis (the extent of the reaction). 

Nimaiyar et al. (2004) also found stearic acid to be the most difficult fatty acid to predict using Fourier-Transform near-infrared spectroscopy over the 833 to 2500 nm range. Stearic acid had the lowest R value and lowest RPD value of all five fatty acids tested. 

Previous work of one of the authors dealt with mid IR monitoring of IB polymerization using fiber-optic equipment. Fourier transform near infrared spectroscopy can be accomplished without expensive hardware. It therefore seemed to be a desirable goal to combine the advantage of fiber optics with low-cost fibers available for measurements in the NIR range. The NIR spectrum of IB obtained after solvent subtraction (Figure 2) reveals at least three signals, which should be suitable for the determination of monomer conversion. 

Fats and Oils with emphasis on Trans Fatty Acids Using Fourier Transform Near Infrared Spectroscopy (FT-NIR), 40 855—867 (2005). 

A. Heinz, M. Savolainen, T. Rades, and C. J. Strachan, Comparative Evaluation of the Degree of Indomethacin Crystallinity by Chemoinfometrical Fourier-Transformed Near-Infrared Spectroscopy and Conventional Powder X-Ray Diffractometry, Eur. J. Pharm. ScL, 32,182 (2007). 

Fourier transform near-infrared spectroscopy had been used to determine traces of hydroxy and carboxy functional groups and water in polyesters. Bowden and co-workers [25] monitored the degradation of PVC using Raman microline focus spectrometry. They demonstrated that PVC decomposition is accompanied by the formation of modal polyene chains containing 11-12 or 13-19 double bonds. Bloor [26] has discussed the Fourier transform Raman spectroscopy of polydiacetylenes. Koenig [27] discusses results obtained by the application of infrared and Raman spectroscopy to polymers. 

Saona-Rodriguez, L. E., et al. "Rapid Detection and Identification of Bacterial Strains by Fourier Transform Near-Infrared Spectroscopy." Journal of Agricultural and Food Chemistry, 49 2001,574r-579. 

M. A. Czarnecki, Y. Liu, Y. Ozaki, M. Suzuki, M. Iwahashi. Potential of fourier transform near-infrared spectroscopy in studies of the dissociation of Fatty acids in the liquid phase. Appl Spectrosc 47 2162, 1993. 

Y. Wang, K. Murayama, Y. Myojo, R. Tsenkova, N. Hayashi, Y. Ozaki. Two-dimensional Fourier transform near-infrared spectroscopy study of heat denaturation of ovalbumin in aqueous solutions. J Phys Chem B 102 6655,1998. 

M. Manley, L. Van Zyl, B. G. Osborne. Using Fourier transform near infrared spectroscopy in determining kernel hardness, protein and moisture content of whole wheat flour. J Near Infrared Spectrosc 10 71—76, 2002. 

Lachenal, G. and I. Stevenson, Apphcabihty of Fourier Transform Near Infrared Spectroscopy and Principal Components Analysis for Studying Elastomers after Radiochemical Ageing. J. Near Infrared Spectrosc., 2002. 10 279-287. 

FIGURE 10.6 Free-radical concentration versus conversion for the styrene (Sty)/divinylbenzene (DVB) copolymerization initiated with 0.10 M MAIB, at 70°C. [DVB] =0.20 (A), 0.10 ( ), 0.05 ( ), and 0 (A) M. Reprinted from Zetterlund PB, Yamazoe H, Yamada B. Ehopagation and termination kinetics in high conversion free radical copolymerization of styrene/divinylbenzene investigated by electron spin resonance and Fourier-transform near-infrared spectroscopy. Polymer 2002 43 7027-7035. 2002, with permission from Elsevier. 

Darcos V, Monge S, Haddleton DM. In situ Fourier transform near infrared spectroscopy monitoring of copper mediated living radical polymerization. J Polym Sci A Polym Chem 2004 42 4933-f940. 

Fourier transform near-infrared spectroscopy, using the C=CH band at 61S2cm for methacrylates, enabled the conversion to be followed in a single sample throughout the polymerization to high conversion. Parallel experiments were performed for near-infrared spectroscopic determination of monomer concentrations and for ESR measurements of radical concentrations. A further advantage of the near-IR method is its applicability to insoluble crosslinked systems. 

Azizian, H. and Kramer, J.K.G., A rapid method for the quantification of fatty acids in fats and oils with emphasis on trans fatty acids using Fourier transform near infrared spectroscopy (FT-MR), Upids, 40, 855-867, 2005. 

Gierlinger, N., Schwaiminger, M., Hinterstoisser, B., Wimmer, R. Rapid determination of heartwood extractives in Larix sp. by means of Fourier transform near infrared spectroscopy. J. Near Infrared Spectrosc. 10, 203-214 (2002)... 

Dressi, E., G. Germelli, P. Corti, M. Massacesi, and P. Perrucio. 1995. Quantitative Fourier transform near-infrared spectroscopy in the quality control of solid pharmaceutical formulations. Analyst 120 2361-2367. 

Urbano Cuadrado, M. et al.. Comparison and joint use of near infrared spectroscopy and Fourier transform mid-infrared spectroscopy for the determination of wine parameters, Talanta, 66, 218, 2005. 

Finally, in the field of full-spectrum NIRS methods, Fourier transform near-infrared (FTIR) analyzers are included (Figure 5.5). FTIR techniques are predominant in mid-infrared spectroscopy because there are clear and absolute advantages for the FTIR analyzer in the mid-infrared compared with any other available technology. This arises because of the low power output of mid-infrared sources and the low specific detectivity... 

Near-infrared Spectroscopy for Process Analytical Technology 127 5.3.4 Fourier transform near-infrared analyzers... 

Huck, C. et al., Quantitative Fourier transform near infrared reflectance spectroscopy (NIRS) compared to high performance liquid chromatography (HPLC) of a flavone in Primulae veris Flos extracts, Pharm. Pharmacol Lett., 9, 26, 1999. 

Although the Fourier compression method can be effective for reducing data into frequency components, it cannot effectively handle situations where the dominant frequency components vary as a function of position in the spectrum. For example, in Fourier transform near-infrared (FTNIR) spectroscopy, where wavenumber (cm-1) is used as the x-axis, the bandwidths of the combination bands at the lower wavenumbers can be much smaller than the bandwidths of the overtone bands at the higher wavenumbers.31,32 In any such case where relevant spectral information can exist at different frequencies for different positions, it can be advantageous to use a compression technique that compresses based on frequency but still preserves some position information. The Wavelet transform is one such technique.33... 

Pudelko-Koerner, C., Fischer, A., Lentzen, H., Glombitza, K.W. and Madaus, A.G. (1996) Quantitative Fourier transform-near infrared reflectance spectroscopy of sennosides in Senna pods Pharm. Pharmacol. Lett. 6, 34-36. 

Recently Benali et al. (2004) reported the development of a new laboratory-made system that allows the combination of rheometric (Alessi et al, 2005) and spectroscopic (Fourier-transform-near infrared (FT-NIR) spectroscopy) measurements for reactive polyurethane materials along the lines of these principles. 

Finally, a quick, non-destructive method, based on Fourier transform near-infrared (FT-NIR) spectroscopy for egg content deteimination of dry pasta was presented by Fodor et al. (2011) with good results. 

Abstract Fourier-transform near infrared (FT-NIR) spectroscopy in combination with a... 

See also Chemometrics and Statistics Optimization Strategies. Chiropticai Anaiysis. Fourier Transform Techniques. Infrared Spectroscopy Sampie Presentation Near-Infrared. Photoacoustic Spectroscopy. 

See alsa Air Analysis Outdoor Air. Cement. Ceramics. Fluorescence Quantitative Anaiysis. Fourier Transform Techniques. Infrared Spectroscopy Near-Infrared. Microscopy Techniques X-Ray Microscopy. Particie Size Anaiysis. Pharmaceuticrai Anaiysis Drug Purity Determination. Quaiitative Anaiysis. Stmcturai Eiucidation. Thermai Anaiysis Overview. X-Ray Absorption and Diffraction Overview X-Ray Absorption X-Ray Diffraction - Singie Crystai. X-Ray Fiuores-cence and Emission X-Ray Fiuorescence Theory Waveiength Dispersive X-Ray Fiuorescence Energy Dispersive X-Ray Fiuorescence Totai Reflection X-Ray Fluorescence Particle-Induced X-Ray Emission. 

See also Fourier Transform Techniques. Infrared Spectroscopy Near-Infrared. Qualitative Anaiysis. Structurai Eiucidation. Thermai Anaiysis Overview. X-Ray Absorption and Diffraction Overview. 

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