1. Decantation and filtration in analytical processes
Decanting and filtration are processes used to prepare samples for analysis. Depending on the case, the aim is to recover :
or the continuous phase, freed as far as possible from suspended matter (e.g. for analysis of air, water, liquid foodstuffs, etc.);
or the dispersed phase (analysis of crystal precipitates, etc.).
The two processes complement each other. Decanting is not very selective and is time-consuming, but it clarifies solutions and therefore avoids the need for filtration on overly-charged solutions. Filtration is more selective, and is designed for particles of various sizes ranging from 0.1 to 10 μm for microfiltration, and from 1 μm to 2 mm or more for filtration. However, filter clogging must be controlled in the case of complex solutions, particularly those incorporating biological...
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Decantation and filtration in analytical processes
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