Fourier-transform infrared (FTIR)



The Fourier-transform infrared (FTIR) spectrometer utilizes broadband IR radiation to probe the vibrational modes of molecule in a liquid, powder, bulk, or thin film sample. The structural features of a molecule and its functional groups produce a characteristic and reproducible absorption in the IR spectrum and can be analyzed to yield both qualitative and quantitative results. This equipment features a robust solid-state IR source, temperature stabilized detector, and permanently aligned interferometer for long term measurement stability. It also includes quick-change sampling modules for added extensibility.


  • Universal transmission sampling module (solid/liquid samples, KBr pellet or foil holder)
  • Diamond/Germanium window Attenuated Total Reflectance (ATR) sampling module
  • KBr beam splitter (350 – 7,500 cm-1 spectral range)
  • High sensitivity pyroelectric DLaTGS room temperature detector
  • Spectral resolution better than 2 cm-1 (optionally better than 0.75 cm-1)
  • Wavenumber accuracy better than 0.05 cm-1 at 1576 cm-1
  • Internal validation unit, automated OQ/PQ energy test and protocols
  • Sampling sizes:
    • 13 mm (KBr pellet, foil)
    • ≥ 5 mm (Ge ATR crystal)
    • ≥ 2 mm (Diamond ATR crystal)
  • OPUS analysis software suite

Location: RFM 2226
Manager: Jacob Armitage
Backup: Dr. Casey Smith
Model: Bruker ALPHA II FTIR Spectrometer