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Fig. 7. 10-port valve.
Chemical resistance
The parts that come into contact with development solutions in the
development unit are resistant to chemicals typically used in
Coomassie and silver staining, for example acetic acid, methanol, and
silver staining solutions. If you plan to use other chemicals, for
example, to clean the unit, you should first check the resistance of the
wetted parts to the chemical in question.
The chemical resistance of a polymer depends on many factors,
including the temperature and concentration of the solution, the
application (a compound that swells may function well as a static seal,
yet fail in dynamic applications), and the period of exposure. Table 1
below is intended as a general guide for the chemical resistance of the
wetted parts in the development unit.
If you are in doubt about the resistance of wetted parts to a certain
chemical, test the parts first; order spare parts for such tests (see
Ordering information, chapter 8).
In general you should avoid using ketones, hot strong acids, and
organic hydrocarbons.
3. Description of the system