Influence of very small bubbles on the dynamic kLA measurement in viscous gas–liquid systems

Abstract Experiments reveal a fraction of tiny bubbles (≪1 mm) in viscous gas‐liquid systems. It is plausible that the oxygen tension is these bubbles will be in equilibrium with that in the liquid within seconds. This means that, as regards to such oxygen concentration changes as occur on k L A determination by the dynamic method, the “liquid‐small bubble dispersion” can be considered as a homogeneous phase. This leads to major corrections and, therefore, the application of the dynamic k L A method in viscous gas‐liquid systems will be problematic.