Raman spectra measured with the resolution of 32 cm−1 are characterised by a higher S/N ratio in comparison with those registered with a better resolution and they can be recorded faster. Unfortunately, apparently too much of the specific spectral information is lost and final calibration models, based on these spectra, give higher quantification errors. On the other side, spectra registered with the resolution of 8 cm−1 are too noisy which results in less robust calibration models. Calibration curves, based on Raman spectra recorded with the resolution of 16 cm−1, and plots of the relative errors obtained for milk components are presented in Fig. 3.