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Proceedings Paper

Industrial Raman: providing easy, immediate, cost-effective chemical analysis anywhere
Author(s): Stuart Farquharson; Wayne W. Smith; Robert M. Carangelo; Carl R. Brouillette
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Paper Abstract

During the past decade Raman spectroscopy has moved out of the shadow if IR spectroscopy and has become a routine laboratory tool for chemical analysis. This is largely due to the development of stable diode lasers, fiber optic samples probes, compact optical designs, high quantum efficiency detectors, and personal computers with fast electronics, and associated data acquisition and analysis. These developments allow real-time, multi-component chemical analysis, and suggest the use of Raman spectroscopy for process monitoring and control. Single-ended fiber optic proves simplify coupling into process streams, allow remote placement of the Raman instrument from the sample point, and give Raman spectroscopy a decided advantage over IR spectroscopy in industrial liquid and solid process applications. Indeed, more than a dozen new Raman instrument companies offering fiber optic based systems have been launched in the past five years. Notably, all of these systems employ charge coupled device detectors. And yet, only one company has successfully penetrated the industrial market. Instrument limitations cited include fluorescence interference, incomplete spectral coverage, wavelength reproducibility, and long-term instrument stability. To address these limitations, Real-Time Analyzers has developed a Fourier transform Raman instrument. It employs a diode pumped Nd:YAG laser with excitation at 1064 nm and a single element, uncooled InGaAs detector, that are integrated into On-Line Technologies' proven rugged, vibration and temperature immune interferometer. Instrument design and industrial applications will be presented.

Paper Details

Date Published: 9 December 1999
PDF: 12 pages
Proc. SPIE 3859, Optical Online Industrial Process Monitoring, (9 December 1999); doi: 10.1117/12.372937
Show Author Affiliations
Stuart Farquharson, Real-Time Analyzers (United States)
Wayne W. Smith, Advanced Fuel Research, Inc. (United States)
Robert M. Carangelo, RMC Consulting (United States)
Carl R. Brouillette, On-Line Technologies, Inc. (United States)

Published in SPIE Proceedings Vol. 3859:
Optical Online Industrial Process Monitoring
Robert J. Nordstrom; Wim A. de Groot, Editor(s)

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