Authors: Iwata, Tetsuo; Koshoubu, Jun; Jin, Chihiro; Okubo, Yusei

Source: Applied Spectroscopy, Volume 51, Issue 9, Pages 330A-355A and 1265-1440 (September 1997) , pp. 1269-1275(7)

Publisher: Society for Applied Spectroscopy

Abstract:

We have studied the temperature dependence (14-57 C) of the OH-stretching vibration band in liquid water by the use of a microscope Fourier transform infrared (FT-IR) instrument with an attenuated total reflection (ATR) cell. In order to eliminate spectral distortions, we performed Kramers-Kronig transform of the ATR spectra and derived absorption- and refractive-index spectra. The numerical values are shown in detail. Application of principal component analysis (PCA) and partial least-squares 1 (PLS 1) modeling methods to the absorption-index spectra shows that the OH band consists of two abstract spectral components. The intensity of the first component changes linearly with temperature, whereas the second component changes nonlinearly, with a turning temperature around 30 C. Each abstract spectrum has a pair of peaks, the intensities of which vary in an inverse manner with respect to each other for the temperature change.

Keywords: WATER SPECTRUM TEMPERATURE DEPENDENCE ATR MICROSCO

Document Type: Research article

DOI: http://dx.doi.org/10.1366/0003702971942196

Publication date: 1997-09-01

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