“…2 Different methods e.g. based on gravimetry, [3][4][5][6] spectroscopy, 6,7 titration, 8 laser techniques, 9 Differential Scanning Calorimetry (DSC), 10,11 refractive index, 12,13 or HPLC 14,15 can then be applied as analytical techniques. Some of these methods have been in use for decades indicating their reliability.…”