Fourier-transform infrared spectroscopy - Wikipedia FTIR is a method of measuring infrared absorption and emission spectra For a discussion of why people measure infrared absorption and emission spectra, i e why and how substances absorb and emit infrared light, see the article: Infrared spectroscopy
Fourier Transform Infrared Spectroscopy (FTIR) Overview Fourier Transform Infrared Spectroscopy (FTIR) identifies and quantifies chemicals via infrared absorption Learn about FTIR principles, how it works, and key applications