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Attenuated Total Reflection (ATR) Sampling in Infrared Spectroscopy of Heterogeneous Materials Requires Reproducible Pressure Control

NCJ Number
Applied Spectroscopy Volume: 71 Issue: 1 Dated: 2017 Pages: 97-104
Zhenyu Lu; Brianna M. Cassidy; Stephanie A. Dejong; Raymond G. Belliveau; Michael L. Myrick; Stephen L. Morgan
Date Published
8 pages
The authors of this article report that while collecting data from fabrics with heterogeneous coatings using infrared spectroscopy, they observed systematic pressure-dependent changes in spectra that can be eliminated by more reproducible pressure control; and they also describe a pressure sensor adapted to work with an attenuated total reflection (ATR) tower to enable more precise control of pressure during ATR sampling.
Attenuated total reflection Fourier transform infrared (ATR FT-IR) spectroscopy, in which the sample is pressed against an internal reflection element, is a popular technique for rapid IR spectral collection; however, depending on the accessory design, the pressure applied to the sample is not always well controlled. (Publisher abstract modified)