Abstract
Various methods and analytical techniques for the preparation and identification of pharmaceutical co-crystals have been applied, but these operations require considerable time for the screening and preparation of co-crystals. In this review, a powerful method that combines Fourier-transform infrared (FTIR) microspectroscopy with thermal analysis is introduced. This unique one-step real-time differential scanning calorimetry (DSC)-FTIR microspectroscopic approach has been successfully applied to simultaneously and directly screen and detect pharmaceutical co-crystal formation in systems such as indomethacin-saccharin, indomethacin-nicotinamide, carbamazepine-glutaric-acid, metaxalone-succinic-acid and piroxicam-saccharin. This powerful one-step DSC-FTIR combined technique provides an easy and direct method for one-step screening and qualitative detection of co-crystal formation in real time.
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