Attenuated Total Reflection (ATR) Sampling in Infrared Spectroscopy of Heterogeneous Materials Requires Reproducible Pressure Control.
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. While collecting data from fabrics with heterogeneous coatings, we have observed systematic pressure-dependent changes in spectra that can be eliminated by more reproducible pressure control. We also described a pressure sensor adapted to work with an ATR tower to enable more precise control of pressure during ATR sampling.
Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA.
Zhenyu
Z
Lu
Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA.
Brianna M
BM
Cassidy
Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA.
Stephanie A
SA
DeJong
Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA.
Raymond G
RG
Belliveau
Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA.
Michael L
ML
Myrick
Department of Chemistry and Biochemistry, University of South Carolina, Columbia, SC, USA.
Stephen L
SL
Morgan
Attenuated total reflection Fourier transform infrared (ATR FT-IR); pressure control; spectroscopy