Liquid-phase samples absorb very weakly in the near-infrared (NIR) region compared to the fundamental region. To detect weak vibrations in NIR region, one uses cells of relatively high pathlengths ranging from 0.1 cm to 5 cm. The selection of a particular pathlength depends upon the
absorption strength of the vibration of interest.
Steacie Institute for Molecular Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada
Publication date: May 1, 1993
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