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Tablet surface characterisation by various imaging techniques.

Paulus Seitavuopio1, Jukka Rantanen, Jouko Yliruusi

  • 1Pharmaceutical Technology Division, Department of Pharmacy, University of Helsinki, PO Box 56, Helsinki 00014, Finland. paulus.seitavuopio@helsinki.fi

International Journal of Pharmaceutics
|March 8, 2003
PubMed
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This study characterized tablet surfaces using microscopy and profilometry. Potassium chloride tablets were found to be smoother than sodium chloride tablets, with higher compression pressure resulting in smoother surfaces.

Area of Science:

  • Pharmaceutical Sciences
  • Materials Science
  • Surface Science

Background:

  • Tablet surface characterization is crucial for drug formulation and manufacturing.
  • Understanding surface roughness impacts tablet properties like dissolution and manufacturability.
  • Various analytical techniques offer different insights into surface topography.

Purpose of the Study:

  • To characterize tablet surfaces using multiple imaging and roughness analytical techniques.
  • To compare the surface properties of potassium chloride (KCl) and sodium chloride (NaCl) tablets.
  • To evaluate the influence of compression pressure on tablet surface roughness.

Main Methods:

  • Optical microscopy
  • Scanning electron microscopy (SEM)

Related Experiment Videos

  • Laser profilometry
  • Atomic force microscopy (AFM)

    • Main Results:

    • Potassium chloride (KCl) tablets exhibited smoother surfaces compared to sodium chloride (NaCl) tablets across all methods.
    • Increased compression pressure led to smoother tablet surfaces for both materials.
    • Imaging techniques (optical microscopy, SEM) provided qualitative surface information.
    • Quantitative roughness data was obtained from laser profilometry (1 mm scale) and AFM (90 µm scale).

    Conclusions:

    • Multiple techniques are valuable for comprehensive tablet surface characterization.
    • AFM provides high-resolution quantitative data, while SEM and optical microscopy offer complementary imaging insights.
    • Tablet material (KCl vs. NaCl) and compression pressure significantly influence surface roughness.