Polymorph transformation in paracetamol monitored by in-line NIR spectroscopy during a cooling crystallization process.
AAPS PharmSciTech
; 12(2): 764-70, 2011 Jun.
Article
em En
| MEDLINE
| ID: mdl-21671200
ABSTRACT
The reliable in-line monitoring of pharmaceutical processes has been regarded as a key tool toward the full implementation of process analytical technology. In this study, near-infrared (NIR) spectroscopy was examined for use as an in-line monitoring method of the paracetamol cooling crystallization process. The drug powder was dissolved in ethanol-based cosolvent at 60°C and was cooled by 1°C/min for crystallization. NIR spectra acquired by in-line measurement were interpreted by principal component analysis combined with off-line characterizations via X-ray diffraction, optical microscopy, and transmission electron microscopy. The whole crystallization process appeared to take place in three steps. A metastable form II polymorph of paracetamol was formed and transformed into the stable form I polymorph on the way to the growth of pure form I by cooling crystallization. These observations are consistent with a previous focused beam reflectance method-based study (Barthe et al., Cryst Growth Des 83316-3322, 2008).
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Temperatura Baixa
/
Espectroscopia de Luz Próxima ao Infravermelho
/
Cristalização
/
Acetaminofen
Idioma:
En
Revista:
AAPS PharmSciTech
Assunto da revista:
FARMACOLOGIA
Ano de publicação:
2011
Tipo de documento:
Article
País de afiliação:
Coréia do Sul