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Further assessment of reduction procedures for Raman spectra
Author(s) -
Murphy W. F.,
Brooker M. H.,
Nielsen O. Faurskov,
Praestgaard E.,
Bertie John E.
Publication year - 1989
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1250201010
Subject(s) - raman spectroscopy , wavenumber , time domain , spectral line , chemistry , reduction (mathematics) , representation (politics) , analytical chemistry (journal) , maxima , frequency domain , excitation , computational physics , optics , mathematics , physics , mathematical analysis , computer science , quantum mechanics , art , geometry , chromatography , politics , performance art , law , political science , computer vision , art history
The origin of reduction procedures used to transform (or normalize) relative Raman intensities is reviewed and discussed in detail in order to clarify the difference between an approach based on the frequency domain representation of Placzek and that based on the time domain representation of Heisenberg as developed by Gordon. These procedures are not designed to replace standard methods for the measurement of accurate absolute Raman scattered intensity. However, they do provide a practical method for a first‐order comparison of Raman spectra for samples measured under different conditions of phase, concentration and temperature and for samples measured with different excitation frequencies. Especially for the low‐wavenumber region, reduced spectra allow analyses of significant spectral features: a linear baseline may be more easily defined, which in turn permits easier measurement of peak maxima, band shapes and relative intensities. Further, certain forms of the reduced Raman spectrum may be compared directly with the corresponding infrared absorption spectrum.