FTIR
Laboratory > Physicals
| Infrared spectrometry by Fourier Transforms (FTIR) | ||
Infrared spectroscopy (FTIR), allows obtaining a spectrum of reflection of the bands of the functional groups of inorganic and organic substances, for which it is possible to carry out an identification of the materials, to detect common contaminants, byproducts of degradation and additives It is a test where the instrument is the basis of the entire test (sample preparation or wet chemistry is not required). One of the great advantages of IR spectroscopy is its versatility, since it allows to study virtually any sample regardless of the state in which it is: liquids, solutions, polymers, gels, fibers, films, gases or surfaces are some examples. |  | |
| Molecular spectroscopy | ||
FTIR is based on the principles of molecular spectroscopy, whereby molecules absorb energy from light at specific wavelengths, known as their resonance frequencies (vibration), represented by the symbol cm-1, it is simply the inverse of the wavelength. The vibrational spectrum of a molecule is considered a unique physical property and therefore characteristic of this molecule. The intensity of the light transmitted through the sample is measured in each wave number, which allows the amount of light absorbed by the sample to be calculated by the difference between the intensity of the light before and after passing through the cell shows. This is known as the infrared spectrum of the sample. |  |