Integrity of Film-Coated Tablets Deduced from Permeability to Gases
Department of Organic Technology, Institute of Chemical Technology, Prague
Keywords: film coating, permeability, coat quality
The integrity of film-coated tablets may be a crucial factor for their long-term stability as well as for their desi-rable action in the digestive tract. Consequently, non-destructive and sensitive tests are very important for quality control of the film-coated tablets. The quasi- stationary permeation of inert gases through the tablets was proposed as a new fast and inexpensive test of the integrity of film-coated tablets. Using the commercial coating material Opadry® and alternative coating materials, the sensitivity to the test of the coating composition and to local damage of the tablets by mechanical stress was demonstrated.
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