What is the principle of FTIR spectroscopy?

FTIR spectrometers rely on the same basic principle as NDIR analyzers, i.e., the fact that many gases absorb IR radiation at species-specific frequencies. However, FTIR spectroscopy is a disperse method, which means that measurements are performed over a broad spectrum instead of a narrow band of frequencies.

How do you explain FTIR?

Essentially, by applying infrared radiation (IR) to samples of materials, FTIR analysis measures a sample’s absorbance of infrared light at various wavelengths to determine the material’s molecular composition and structure.

What is FTIR spectroscopy used for?

FTIR spectroscopy is used to quickly and definitively identify compounds such as compounded plastics, blends, fillers, paints, rubbers, coatings, resins, and adhesives. It can be applied across all phases of the product lifecycle including design, manufacture, and failure analysis.

What is FTIR spectroscopy PDF?

FT-IR stands for Fourier Transform InfraRed, the preferred method of infrared spectroscopy. In infrared spectroscopy, IR radiation is passed through a sample. Like a fingerprint no two unique molecular structures produce the same infrared spectrum. This makes infrared spectroscopy useful for several types of analysis.

What is the principle of FTIR?

FTIR PRINCIPLE. Principle of FTIR is based on the bonds and the groups of bonds vibrates at some characteristic frequencies. The molecule to be identified is exposed to the infrared rays. This molecule or a sample absorbs infrared energy at different frequencies which are the characteristic of the molecules.

What is the difference between FTIR and IR?

IR takes a single spectrum.

Why to use FTIR testing?

FTIR is mainly used for: The identification of unknown compounds Quantitative information, such as additives or contaminants Kinetic information through the growth or decay of infrared absorptions To give complex information when coupled with other devices such as TGA, GC or Rheometry

What is the difference between IR and FTIR instrument analysis?

The major difference between the IR and FTIR is that IR uses a monochromatic system, whereas the FTIR uses a Michelson interferometer. Instead of shining a monochromatic light beam into the sample, this system shines a beam from several frequencies of light at once and determines how much of that beam is absorbed by the sample.