Biorelevant dissolution instruments represent an important tool for pharmaceutical research and development. These instruments are designed to simulate the dissolution of drug formulations in conditions most closely mimicking the gastrointestinal tract. In this work, we focused on the optimization of dissolution compartments/vessels for an updated version of the biorelevant dissolution apparatus-Golem v2. We designed eight compartments of uniform size but different inner geometry. The dissolution performance of the compartments was tested using immediate release caffeine tablets and evaluated by standard statistical methods and principal component analysis. Based on two phases of dissolution testing (using 250 and 100 mL of dissolution medium), we selected two compartment types yielding the highest measurement reproducibility. We also confirmed a statistically ssignificant effect of agitation rate and dissolution volume on the extent of drug dissolved and measurement reproducibility.

Central Laboratories Faculty of Pharmacy University of Veterinary and Pharmaceutical Sciences Brno Palackeho 1 612 42 Brno Czech Republic

Department of Chemical Drugs Faculty of Pharmacy University of Veterinary and Pharmaceutical Sciences Brno Palackeho 1 612 42 Brno Czech Republic

Department of Pharmaceutics Faculty of Pharmacy University of Veterinary and Pharmaceutical Sciences Brno Palackeho 1 612 42 Brno Czech Republic

Department of Social Pharmacy Faculty of Pharmacy University of Veterinary and Pharmaceutical Sciences Brno Palackeho 1 612 42 Brno Czech Republic

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