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Related Experiment Videos

Lactose: a definitive guide to polymorph determination.

J H Kirk1, S E Dann, C G Blatchford

  • 1Department of Chemistry Loughborough University, Loughborough, Leicestershire LE11 3TU, UK.

International Journal of Pharmaceutics
|November 18, 2006
PubMed
Summary
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This study provides a definitive guide to identifying lactose polymorphs using simple analytical techniques. It resolves contradictory research by offering clear methods for distinguishing between these crystalline forms.

Area of Science:

  • Solid-state chemistry
  • Materials science
  • Analytical chemistry

Background:

  • Lactose exists in multiple crystalline forms (polymorphs) with distinct properties.
  • Previous research on lactose polymorphs has been contradictory.
  • A clear method for differentiating lactose polymorphs is lacking.

Purpose of the Study:

  • To establish a conclusive guide for identifying lactose polymorphs.
  • To resolve inconsistencies in existing scientific literature.
  • To offer simple analytical methods for polymorph discrimination.

Main Methods:

  • In situ and ex situ powder X-ray diffraction (PXRD).
  • Charge-coupled device (CCD)-Raman spectroscopy.
  • Fourier-transform infrared (FT-IR) spectroscopy.

Related Experiment Videos

  • Carbon-13 (13C)-(1)H cross-polarization magic angle spinning nuclear magnetic resonance (CP-MAS NMR) spectroscopy.

    • Main Results:

    • Detailed characterization of single-phase lactose polymorphs.
    • Establishment of distinct spectral fingerprints for each polymorph.
    • Validation of simple analytical techniques for polymorph identification.

    Conclusions:

    • The study successfully provides a definitive guide for identifying lactose polymorphs.
    • The presented methods enable clear discrimination between different crystalline forms of lactose.
    • This work resolves long-standing contradictions in lactose polymorph research.