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Fourier Transform Infrared Spectroscopy (FTIR)

FTIR is a technique which is used to obtain an infrared spectrum of absorption, emission, photoconductivity or Raman scattering of a solid, liquid, or gas.  It is a kind of vibrational spectroscopy method. The basis of the method is that a diatomic molecue has a specific vibrational intensity and when a quanta of infrared light interacts with the molecule, it may absorb the energy and vibrate faster.  Some of the infrared radiation is absorbed by the sample and some of it is passed through.   The resulting spectrum provides a molecular fingerprint that can be collected by a spectrometer.

MB 3000 FTIR InstrumentMB 3600 FTIR Instrument

An FTIR spectrometer simultaneously collects spectral data in a wide spectral range. This is a significant advantage over a dispersive spectrometer which measures intensity over a narrow range of wavelengths at a time.

Applications of FTIR Based Instruments

FTIR is a chemically-specific analysis technique and so it is most often used to identify chemical compounds as required in the aerospace, academic, chemical, pharmaceutical and petrochemical industries.  It can identify unknown materials to determine the quality or consistency of a sample as well as determine the amount of components in a mixture.

Specific uses range from QA/QC testing of raw materials in pharmaceutical laboratories to detection of trace amounts of explosives/narcotics in forensic analysis.

Advantages of FTIR Method+  widely used for identity testing raw materials+  highly specific results can be obtained+  very small samples can be tested Disadvantages of FTIR Method-  can be some difficulty identifying mixtures -  sample preparation can be somewhat time consuming -  changes in atmospheric conditions while testing can affect results

Global Scientific offers the MB3000 and MB3600 which are excellent instruments for utilizing the FTIR testing method.

We also offer a wide range of alternative methods of testing including XRF, OES, NMR, RAMAN, and VCD.

Feel free to contact us to help you choose the right solution for your application.

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