INFRARED SPECTROSCOPY (FTIR)
Fourier-Transform Infrared Spectroscopy (FTIR) is an important method used to characterize and identify crystalline forms and functional groups of substances. This non-destructive technique allows qualitative and semi-quantitative analyses of samples both in solid and liquid state.
It is not only a widely used technique for substance identification due to its high reliability, speed, and relatively low cost, FTIR has also been applied in determining the polymorphism, as the vibrational spectrum is unique and reproducible for each polymorph.