System complexity and information requirements

In order to determine rate constants rigorously in interfacial reactions, methods are required which allow determination of reactant concentrations and chemical rates actually at the reactive surface. This requires a degree of control of the hydrodynamics which is not available in stirred vessels, and more sophisticated methods are used in these cases. Minimal criteria for the unambiguous determination of interfacial chemical kinetics have been enumerated elsewhere and are as follows [13]. 

Transport of the reactants to the interface should be well defined and calculable. 

The interface between the two phases should be well defined in terms of area and topography. 

There should be good control of the bulk solution phase concentrations, ideally with constant conditions being maintained this is usually best achieved in a flow system. 

VS = vacant site HL = acid form of oxime ligand HL = H++ L  

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