What is Fourier Transform?
The common technologies used to produce IR spectra are dispersive and Fourier Transform (FT). FT systems are much more advanced and have numerous performance advantages over the dispersive instrumentation. Fourier Transform is a mathematical calculation used to transform a frequency domain spectra into an infrared spectra. FT instruments scan the full spectral range faster. FT’s high signal to noise ratio and high resolution measurement generate higher spectral quality and better sensitivity of small peaks, i.e. finer absorbances, which makes the details in a sample spectrum clearer and more distinguishable. More calibrations and lower detection limits can be achieved. FT instruments use a laser to calibrate the wavelength and makes the accuracy and precision of IR spectra much higher over other technologies. On the other side, the FT-IR technology is rather complicated and requires higher technical skills to develop, manipulate and optimize the calibrations with robust performance. QT
