Solid state transformations in consequence of electrospraying – A novel polymorphic form of piroxicam
| Autor: | Jorma Roine, Matti Murtomaa, Jarno Salonen, Hélder A. Santos, R. Mohan Sankaran, Maija Nyström |
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| Rok vydání: | 2015 |
| Předmět: |
Scanning electron microscope
Analytical chemistry Pharmaceutical Science Spectrum Analysis Raman Piroxicam law.invention symbols.namesake Differential scanning calorimetry X-Ray Diffraction law Spectroscopy Fourier Transform Infrared medicine Crystallization Thermal analysis Dissolution Chromatography High Pressure Liquid ta217 Crystallography Calorimetry Differential Scanning ta114 Chemistry Temperature General Medicine Polymorphism (materials science) symbols Raman spectroscopy Biotechnology medicine.drug |
| Zdroj: | European Journal of Pharmaceutics and Biopharmaceutics. 89:182-189 |
| ISSN: | 0939-6411 |
| Popis: | The aim of the research was to verify that electrospraying of piroxicam yielded a new polymorphic form of this drug. In the experiments, piroxicam was dissolved in chloroform and the solution was atomised electrostatically. Subsequently, the charged droplets were neutralised and dried. The solid drug particles were collected and analysed by scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, high performance liquid chromatography, and infrared and Raman spectroscopy. The X-ray diffractogram measured for the electrosprayed piroxicam particles did not match with any of the known piroxicam crystal structures (Cambridge Crystallographic Data Centre). The variable temperature X-ray diffraction showed that the structure recrystallised completely into piroxicam polymorphic form I during heating. No degradation products or solvate removal was detected by high performance liquid chromatography and thermal analysis. The infrared and Raman spectra of the electrosprayed piroxicam were compared to those of form I, and some notable differences in the peak positions, shapes and intensities were detected. The results indicate that electrospraying leads to piroxicam crystallisation in a currently unknown polymorphic form. |
| Databáze: | OpenAIRE |
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