Application of ATR-UV Spectroscopy for Monitoring the Crystallisation of UV Absorbing and Nonabsorbing Molecules

摘要

In the pharmaceutical industry, controlling the crystallization process of active pharmaceutical ingredients (API) is crucial to ensure chemical quality and physical properties. Process analytical technologies (PAT) provide a large number of tools that provide information in real-time to allow mastery of the final solid chain. In this paper is described how attenuated total reflection ultraviolet (ATR-UV) spectroscopy can be used to monitor concentration. Besides its classical application to UV-absorbing molecules, it will be shown how, in principle, it may be applied to molecules that do not absorb at UV wavelengths.