Fourier Transform Infrared (FTIR) spectroscopy in combination with multivariate data analysis is introduced for the quality control
and authenticity assessment of spirit drinks and beer in official food control.
The spectra were measured using a FTIR interferometer,
which is purpose-built for the analysis of alcoholic beverages and includes an injection unit for liquids with automatic thermostating of
the sample. Only 2 min are required for FTIR measurement. For spirit drinks, no sample preparation is required at all. Carbon dioxide
containing samples, such as beer were prepared by degassing.