FT-Raman On-Line Analysis of PCI3 Reactor Material

1993 ◽  
Vol 47 (8) ◽  
pp. 1115-1122 ◽  
Author(s):  
John J. Freeman ◽  
David O. Fisher ◽  
Gregory J. Gervasio
Keyword(s):  
Raman Spectroscopy ◽  
Reactor Material ◽  
Analytical Technique ◽  
Near Ir ◽  
Ft Raman Spectroscopy ◽  
On Line ◽  
And Control ◽  
Related Compounds ◽  
Line Analysis ◽  
Ft Raman

Fourier transform (FT)-Raman spectroscopy has been applied to the online analysis and control of a PCI, reactor. This particular analytical technique was selected from a consideration of the Raman scattering efficiencies of the constituents of the reaction and the ability of the fiberoptic-coupled, near-IR, FT-Raman systems to remotely sample the toxic and potentially hazardous reaction mixture. In this communication we describe the Raman spectra of P4, PCl3, PCl5, and P4 dissolved in PCl3, as well as related compounds, along with relative band intensities of the constituents of the reaction. Factors leading to the optimum FT-Raman configuration for this particular process control problem are discussed in detail.

On-Line Monitoring of Airborne Chemistry in Levitated Nanodroplets:  In Situ Synthesis and Application of SERS-Active Ag−Sols for Trace Analysis by FT-Raman Spectroscopy

2003 ◽  
Vol 75 (9) ◽  
pp. 2166-2171 ◽  
Author(s):  
Nicolae Leopold ◽  
Michael Haberkorn ◽  
Thomas Laurell ◽  
Johan Nilsson ◽  
Josefa R. Baena ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Trace Analysis ◽  
In Situ Synthesis ◽  
Ft Raman Spectroscopy ◽  
On Line ◽  
Ft Raman

Near-IR FT-Raman Spectroscopy of Methyl-B12and Other Cobalamins and of Imidazole and Imidazolate Methylcobinamide Derivatives in Aqueous Solution

1996 ◽  
Vol 35 (16) ◽  
pp. 4656-4662 ◽  
Author(s):  
James M. Puckett, ◽  
Mark B. Mitchell ◽  
Shun Hirota ◽  
Luigi G. Marzilli
Keyword(s):  
Aqueous Solution ◽  
Raman Spectroscopy ◽  
Near Ir ◽  
Ft Raman Spectroscopy ◽  
Ft Raman

Near-IR FT Raman spectroscopy of human aorta

1992 ◽  
Author(s):  
C. H. Liu ◽  
Wenling S. Glassman ◽  
Robert R. Alfano ◽  
Han-Ru Zhu ◽  
Daniel L. Akins ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Human Aorta ◽  
Near Ir ◽  
Ft Raman Spectroscopy ◽  
Ft Raman

Biological applications of near- IR fourier-transform Raman microspectroscopy

1992 ◽  
Vol 50 (2) ◽  
pp. 1530-1531
Author(s):  
Yukihiro Ozaki
Keyword(s):  
Raman Spectroscopy ◽  
Fourier Transform ◽  
Photosynthetic Bacteria ◽  
Near Infrared ◽  
Raman Microspectroscopy ◽  
Excitation Wavelength ◽  
Near Ir ◽  
Ft Raman Spectroscopy ◽  
Sample Position ◽  
Ft Raman

Recently-developed near-infrared Fourier transform (FT)-Raman spectroscopy has received keen interest of researchers in bio-Raman field because near-infrared excitation can avoid mostly fluorescence and photodecomposition, which have been two major drawbacks of Raman spectroscopy in its biological and medical applications. Introduction of FT-Raman microspectroscopy makes near-infrared FT-Raman spectroscopy more useful for studying biomedical materials. The purpose of the present paper is to demonstrate the potential of near-infrared FT-Raman microspectroscopy in nondestructive structural analysis of biological systems. Photosynthetic bacteria is taken up here as an example.The FT-Raman spectra of the photosynthetic bacteria were measured with a JEOL JRS-FT6500N FT-Raman spectrometer equipped with an optical microscopy. Excitation wavelength at 1064-nm was provided by a CW Nd:YAG laser (CVI YAGMAX c-92), and the laser power at the sample position was typically 150 mW. All the data were collected at a spectral resolution of 8 cm-1 and spatial resolution of 8 μm.

Graphitic carbon nitride C6N9H3·HCl: Characterisation by UV and near-IR FT Raman spectroscopy

2009 ◽  
Vol 182 (10) ◽  
pp. 2670-2677 ◽  
Author(s):  
Paul F. McMillan ◽  
Victoria Lees ◽  
Eric Quirico ◽  
Gilles Montagnac ◽  
Andrea Sella ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Carbon Nitride ◽  
Graphitic Carbon ◽  
Graphitic Carbon Nitride ◽  
Near Ir ◽  
Ft Raman Spectroscopy ◽  
Ft Raman

Monitoring of High Solids Content Starved-Semi-Batch Emulsion Copolymerization Reactions by Fourier Transform Raman Spectroscopy

2005 ◽  
Vol 59 (10) ◽  
pp. 1270-1279 ◽  
Author(s):  
Oihana Elizalde ◽  
José M. Asua ◽  
Jose R. Leiza
Keyword(s):  
Raman Spectroscopy ◽  
Fourier Transform ◽  
Butyl Acrylate ◽  
High Solids ◽  
Emulsion Copolymerization ◽  
Ft Raman Spectroscopy ◽  
On Line ◽  
Solids Content ◽  
High Solids Content ◽  
Ft Raman

A high solids content n-butyl acrylate/methyl methacrylate emulsion copolymerization process carried out under starved semi-batch conditions was for the first time monitored on-line by means of Fourier transform (FT)-Raman spectroscopy. Partial least squares regression was employed to build calibration models that allowed relating the spectra with solids content (overall conversion), free amounts of both n-butyl acrylate (n-BA) and methyl methacrylate (MMA), and cumulative copolymer composition. In spite of the heterogeneous nature of the polymerization, the similarities of the spectra for MMA, n-BA, and for the copolymer, and the low monomer concentrations in the reactor, the FT-Raman spectroscopy has been shown to be a suitable noninvasive sensor to accurately monitor the process. Therefore, it is well suited for on-line control of all-acrylic polymerization systems.

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