Fourier Transform Infrared Spectroscopy (FTIR) - Nicolet



FTIR is a chemical analysis technique that takes advantage of the tendency of covalent bonds in molecules to vibrate at certain characteristic frequencies. We think of covalent bonds as behaving like springs. Covalent bonds bend and stretch at certain frequencies in the infrared (IR) spectral range depending on the mass of the atoms and the types of covalent bonds holding them to their neighboring atoms. By measuring the relative absorption of IR light we can generate a finger print type spectrum characteristic of the chemical compound being studied. This technique can be used to measure pure solids, liquids, and gasses and some compounds diluted in a medium transparent to IR energy.