SEARCH Articles Figures Tables Spectroscopy subtractively normalized interfacial Fourier Subtracter Subtracting Subtractive Subtractively normalized interfacial Subtractively normalized interfacial Fourier SNIFTIRS) Subtractively normalized interfacial Fourier transform infrared Subtractively normalized interfacial Fourier transform infrared spectroscopy Subtractively normalized interfacial Fourier transformation infrared Subtractively normalized interfacial Fourier-transform infrared reflection