Raman spectroscopic investigation of film thickness

T. Sovány, K. Nikowitz, G. Regdon, P. Kása, K. Pintye-Hódi

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17 Citations (Scopus)


The determination of film thickness is of prime importance in the quality assurance of coated pharmaceutical preparations. The rapid measurement of this parameter is problematic for multi-particulate pellet systems. The aim of this study was to apply the Raman spectroscopic method for the determination of the thickness of polymer coating on pellets. The change of Raman intensity was compared with measured film thickness, which was calculated from the change of the geometric parameters of the pellets, measured with an image-analyzing system. The results revealed that despite some difficulties Raman spectroscopy is a suitable method for the fast and accurate determination of film thickness on multi-particulate systems.

Original languageEnglish
Pages (from-to)770-772
Number of pages3
JournalPolymer Testing
Issue number7
Publication statusPublished - Oct 1 2009



  • Film thickness
  • Image analysis
  • Pellets
  • Raman spectroscopy

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

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