Dissolution rate measurements (non-GMP)

Introduction to dissolution rate measurements

The dissolution rate is a measure of the actual release rate of the compound at the given particle size etc. in an aqueous media. It often vary considerably with solid form, e.g. particle size and shape (read more about dissolution theory). Dissolution tests are used for:

  • Ensuring that production processes are under control.
  • Evaluating of the developability of a compound: Does the  dose at the given particle size dissolve in vivo? This can be tested by examining the dissolution rate in different solvents, mimicing the biological conditions (pH 1-8 ).

For a quote on dissolution rate: Use the contact form 


Instrument and measuring principle

The dissolution test equipment applied by Particle Analytical is a Vankel Dissolution Sampling Station. The concentrations are determined on a Varian UV-VIS spectrometer. The default solvent volume is 900 ml unless otherwise stated. Samples are withdrawn at welldefined intervals and filtrated before concentration determination.

Technical info
Instrument Vankel VK8000 Dissolution Sampling Station
Sample amount Depends on purpose (dissolution of tablet or powder – sink conditions). Max solvent volume: 900 ml
Temperatures 25-50 °C
Stirring rates 50 or 100 RPM
Result Reported as curve showing concentration over time (min)