Vibrational spectroscopic characterisation of salmeterol xinafoate polymorphs and a preliminary investigation of their transformation using simultaneous in situ portable Raman spectroscopy and differential scanning calorimetry

Ali, H. R. H. and Edwards, H. G. M. and Hargreaves, M. D. and Munshi, T. and Scowen, I. J. and Telford, R. J. (2008) Vibrational spectroscopic characterisation of salmeterol xinafoate polymorphs and a preliminary investigation of their transformation using simultaneous in situ portable Raman spectroscopy and differential scanning calorimetry. Analytica Chimica Acta, 620 (1-2). pp. 103-112. ISSN 0003-2670

Full content URL: http://dx.doi.org/10.1016/j.aca.2008.05.009

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Item Type:Article
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Abstract

Knowledge and control of the polymorphic phases of chemical compounds are important aspects of drug development in the pharmaceutical industry. Salmeterol xinafoate, a long acting β-adrenergic receptor agonist, exists in two polymorphic Forms, I and II. Raman and near infrared spectra were obtained of these polymorphs at selected wavelengths in the range of 488-1064 nm; significant differences in the Raman and near-infrared spectra were apparent and key spectral marker bands have been identified for the vibrational spectroscopic characterisation of the individual polymorphs which were also characterised with X ray diffractometry. The solid-state transition of salmeterol xinafoate polymorphs was studied using simultaneous in situ portable Raman spectroscopy and differential scanning calorimetry isothermally between transitions. This method assisted in the unambiguous characterisation of the two polymorphic forms by providing a simultaneous probe of both the thermal and vibrational data. The study demonstrates the value of a rapid in situ analysis of a drug polymorph which can be of potential value for at-line in-process control. © 2008 Elsevier B.V. All rights reserved.

Keywords:Differential scanning calorimetry, Drug products, Raman spectroscopy, Vibrational spectroscopy, In process control, Pharmaceutical industry, Salmeterol xinafoate polymorphs, Polymorphism, salmeterol xinafoate, article, drug structure, isotherm, near infrared spectroscopy, priority journal, Raman spectrometry, temperature dependence, X ray diffraction, Albuterol, Calorimetry, Differential Scanning, Molecular Structure, Spectrophotometry, Infrared, Spectrum Analysis, Raman, Temperature, Vibration, X-Ray Diffraction
Subjects:F Physical Sciences > F100 Chemistry
Divisions:College of Science > School of Chemistry
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ID Code:13046
Deposited On:19 Mar 2014 19:39

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