Speciation analysis
Scientists at ACeSSS have extensive experience in the development of
speciation models for complex multi-component systems. This includes
both surface and solution speciation as in many dissolution processes
there is a strong correlation between what is occurring at the surface
and in solution. We have used such techniques to study a wide range of
environmental and industrial problems.
Typically a study will involve a combined theoretical and experimental approach. In the case of a surface speciation study we employ surface sensitive experimental techniques such as ToF-SIMS, SEM and XPS amongst others. Often we will employ synchrotron radiation to collect this data. This data provides not only bulk elemental analysis of a system but also the spatial distribution of elements.
For solution studies we employ a wide range of techniques to establish the concentration of elements present in the sample, the redox state of the solution, the pH etc. This experimental data provides the input to allow us to develop sophisticated speciation models identifying the molecular species formed in the system. Once a model has been constructed it then becomes possible to simulate the effect of induced changes on the overall speciation of the system.