Antec Scientific ROXY Exceed, User Manual, Page: 37 / 126

CHAPTER 3 Maintenance, checks & shutdown 37
Shutting down the system
There are a couple of steps to take to switch off an LC system with electro-
chemical potentiostat for a longer period of time. Shutting down is not dif-
ferent from most other HPLC systems. Perform the following procedure:
•
Switch off the flow cell using the keyboard (standalone) or via the
software (Dialogue Elite).
•
If a column is installed, check the column(s) documentation for the
appropriate storage liquid, apply this and make sure the column is
properly flushed. A reversed phase C18 column is usually stored
with 50% Acetonitrile/water.
•
Take out the column, mount the corresponding end-caps and store
the column in an appropriate place.
•
Flush and store the system with 50% water/acetonitrile (or
methanol). Switch the injector valve between load and inject a few
times. Make sure all tubing, filters etc. are flushed so no traces of
salt are left that could precipitate and clog the system.
•
Remove the flow cell from the system by disconnecting the inlet
and outlet capillary.
•
Open the cell, flush with water, use some tissues to carefully dry
the cell.
•
Close the cell and store dry.
•
Switch off the potentiostat (and other LC equipment) via the mains
switch (switch to position ‘0’) on the rear panel.
Avoid precipitation of high salt concentrations in organic solvent, first
wash out salts with water if necessary.