SEARCH Articles Figures Tables Absorption IR spectroscopy FT-IR reflection-absorption spectroscopy IR absorption IR reflectance IR reflection-absorption spectroscopy (IRAS Polarization modulated IR reflection absorption spectroscopy Polarization-modulation IR reflection absorption spectroscopy Reflectance spectroscopy Reflectance, IR spectroscopy Reflection Absorption IR Spectroscopy (RAIRS) Reflection spectroscopy Reflection-absorption spectroscopy Reflectivity spectroscopy