SEARCH Articles Figures Tables Characterization by Diffuse Reflectance IR Spectroscopy Diffuse Reflectance IR (Fourier Transform) Spectroscopy (DRIFT) Diffuse reflectance FT-IR spectroscopy Diffuse reflectance IR Fourier transform spectroscopy Diffuse reflectance IR spectroscopy Diffused reflectance IR Fourier transform spectroscopy Diffused reflectance IR Fourier transform spectroscopy DRIFTS) External reflectance IR spectroscopy External reflection IR spectroscopy FT-IR reflection-absorption spectroscopy IR reflectance IR reflection spectroscopy IR reflection-absorption spectroscopy (IRAS In situ IR reflectance spectroscopy Internal reflectance IR spectroscopy Internal reflection IR spectroscopy Polarization modulated IR reflection absorption spectroscopy Polarization-modulation IR reflection absorption spectroscopy Reflectance spectroscopy Reflection Absorption IR Spectroscopy (RAIRS) Reflection spectroscopy Reflection-absorption IR spectroscopy Reflectivity spectroscopy Total reflectance IR spectroscopy