What are the strong benefits of vacuum optics for demanding FTIR experiments? The different vibrational modes of water vapour and carbon dioxide in the lab air have their absorption bands in the whole MIR (mid infrared) and FIR/THz (far infrared / terahertz) spectral range (see figure). Especially in the FIR region, the pure rotational modes of the atmospheric contaminations can even lead to total absorption of the IR light. The most common method of reducing the effects of atmospheric contaminations is to purge the optics bench as can be done for the VERTEX 80 and VERTEX 70 FTIR spectrometers. However, even “dry” purge air always contains residual moisture and CO2, causing significant atmospheric artifacts and effectively limiting sensitivity. In particular for demanding R&D measurements in mid and far infrared it can therefore be difficult or even impossible to obtain adequate results. Only a vacuum spectrometer can completely overcome these inherent limitations.
Bruker’s VERTEX 80v and VERTEX 70v vacuum FTIR spectrometers provide highest flexibility and stability for advanced research applications. The entire vacuum optics design eliminates atmospheric disturbances in the resulting spectra and reduces artifacts caused by temperature fluctuations in the environment. Especially the VERTEX 80v vacuum spectrometer with its unique UltraScanTM interferometer is the acknowledged gold standard for the most demanding applications, where highest sensitivity, broadest spectral range (in particular the FIR/THz region) or highest spectral or temporal resolution are required.
|Read VERTEX Brochure Advanced Research FTIR Spectrometers.|
|Read the Product Note T18-02/08 Vacuum Advantages: Isolate Yourself from the Elements.|
Vacuum Advantages for FTIR Spectroscopy
VERTEX Vacuum Features