A readily automated procedure for testing and calibrating the wavenumber shift scale of an FT-Raman spectrometer is described. The procedure uses atomic lines as wavenumber standards. An apodization procedure is used in accurately determining the line positions to a fraction of the
sampling interval. A fiber-optic bundle conveniently couples the output from a hollow cathode lamp to the collection optics of the Raman accessory. Results are reported and compared for both thorium and neon atomic lines. Acetonitrile is suggested as a wavenumber shift standard, and peak shifts
have been measured for its major features. Peak shift values are reported for 11 lines of cyclohexane.
Department of Chemistry, Florida State University, Tallahassee, Florida 32306-3006
Publication date: July 1, 1995
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