SEARCH Articles Figures Tables Attenuated reflectance FTIR spectroscopy Attenuated total reflection-Fourier transform infrared spectroscopy (ATR-FTIR Diffuse Reflectance FTIR (DRIFT) Spectroscopy FTIR diffuse reflectance spectroscopy Polarization-modulated FTIR reflection absorption spectroscopy Reflectance spectroscopy Reflection spectroscopy Reflectivity spectroscopy Zeolite reflectance FTIR spectroscopy