The FTIR interferometer used with ProcesScan™ collects data from the entire spectrum allowing measurement of new parameters even in complex dairy products. Analysis of an additional parameter simply becomes a matter of calibration.
The infrared beam hits the beam splitter, which sends half of the light to a fixed mirror and the other half to a moveable mirror. From the mirrors, the IR beams reflect and combine before they reach the detector. All of the IR frequencies travel through the interferometer at the same time, and rapid small movements of the mirror enable simultaneous generation of the entire IR spectrum. The laser sends out light at only one wavelength, and is used to determine the actual wavelength based on the position of the mirror.
The advantage of standardisation
The fact that FTIR instruments are standardised offers a great advantage. A calibration developed on one instrument can be transferred to other instruments to provide identical readings. Standardisation is achieved by comparing spectra on a specially developed FTIR equalizer sample, collected on a newly installed instrument (slave) to the spectra of a similar sample using a master instrument at FOSS.