PPT Slide
- The third advantage of FTIR is known as the the Connes advantage.
- The Connes advantage arises because the frequency scale of the spectrum is known very accurately, as seen in part 1.
- This control over the calibration of the wavelength domain means “mirror-movement averaging” is possible. This means the collection many spectra and their co-addition.
- The addition of many spectra increases signal to noise ratio in FTIR spectroscopy.
- An additional advantage of the accurate wavelength calibration is that because the wavelength is known absolutely, techniques such as spectral subtraction can be used easily. For example, you might remove the spectrum of a solvent, to obtain that of the solute.