Infrared Spectroscopy

 

Bruker Alpha ATR FTIR Spectrometer

with diamond ATR (attenuated total reflection) unit

Collecting an infra-red spectrum in the ATR mode involves placing your liquid or solid sample on the the ATR unit which has a crystal that features a higher refractive index than the sample’s to achieve internal reflection.  Different wavelengths of IR light get refracted slightly differently. This results in some wavelengths of IR light penetrating the sample deeper than other wavelengths. This can cause the intensities of some signals to change as well as their position on the spectrum when compared to data collected in transmission mode, where  the IR light passes directly through the sample. 

A diamond crystal is because of its hardness and chemically inertness the material of choice. Liquids, pastes, powders, pellets, or even larger work pieces and finished products can be studied.

Accessible spectral range 45 000 – 10 cm-1
Penetration depth 1.66 µm

 

Sponsor: Fonds der Chemischen Industrie, Germany

Location: BCE Åbogade 5366-125

Responsible: Dr. Ramkumar Venkatachalam