What does FT NIR mean?
Fourier transform near-infrared spectroscopy
Fourier transform near-infrared spectroscopy (FT-NIR) is a non-destructive chemical analysis technology that provides a means to identify and analyze various materials.
What is FTIR used for?
FTIR spectra reveal the composition of solids, liquids, and gases. The most common use is in the identification of unknown materials and confirmation of production materials (incoming or outgoing). The information content is very specific in most cases, permitting fine discrimination between like materials.
What is FTIR principle?
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. The IR beams passes through an interferometer, which consists of a beam splitter, a fixed mirror and a moving mirror.
Who invented FTIR?
Albert Abraham Michelson
History. The creation of today’s FTIR would not have been possible had it not been for the existence of the Michelson interferometer. This essential piece of optical equipment was invented by Albert Abraham Michelson. He received the Nobel Prize in 1907 for his accurate measurements of the wavelengths of light.
What is the difference between NIR and FTIR?
An FTIR spectrometer must have a moving part (a moving mirror) whereas a nir spectrometer with an array detector could record all the dispersed wavelengths simultaneously without the use of any moving parts. The cost of a hand-held FTIR spectrometer can be two to three times higher than a handheld nir spectrometer.
What does NIR measure geography?
A natural increase rate (NIR) is the percent a population will grow per year, excluding annual migration. Usually, an NIR of 2.1 is required to maintain or stabilize a region’s population. Any more than that and the population will grow, any less than a NIR of 2.1 causes population contraction.
What is difference between FTIR and IR?
FTIR spectrometers have several prominent advantages: (1) The signal-to-noise ratio of spectrum is significantly higher than the previous generation infrared spectrometers. (2) The accuracy of wavenumber is high. Due to these advantages, FTIR Spectrometers have replaced dispersive IR spectrometers.
What can FTIR not detect?
FTIR spectrometers are exceptionally useful for identifying unknown chemicals of a variety of colors. FTIR is sometimes confused or blinded by water. Like Raman, it cannot see elements, simple ionic compounds, and purely ionic acids in water.
Is IR and FTIR same?
Infrared spectroscopy is a method of identifying and analyzing chemical compounds. The Fourier transform infrared (FTIR) spectrometer is the most common type of infrared spectrometer. It records the data collected and transforms the data into a spectrum.
Why KBr is used in FTIR?
KBr is used as a carrier for the sample in IR spectrum and it is optically transparent for the light in the range of IR measurement. So that no interference in absorbence would occur. KBr, has a transmittance of 100 % in the range of wave number (4000-400 cm-1). Therefore, it does not exhibit absorption in this range .
What is full form of FTIR?
Fourier Transform Infrared Spectroscopy (FTIR) identifies chemical bonds in a molecule by producing an infrared absorption spectrum.
Why is NIR better than FTIR?
FT-NIR instruments utilize the same method as FTIR with the difference that their source is more suitable for near infrared measurements. FTIR typically uses a Silicon Carbide source which peaks at nearly 5 m as compared to FT-NIR which uses QTH lamps which peak at nearly 2 m.