Chemical Compatibility - Sartorius Stedim Biotech Sartolab-P20 Instrucciones Para El Uso

Caution
When filtering solutions containing
surface-active substances (organic solvent
components, alcohols), the water penetration
pressure of the PTFE membrane may
decrease so much that liquid seeps out of
the automatic vents. If necessary, rinse these
substances out of the PTFE membrane first,
then dry the unit in a drying oven overnight
at 105°C.
Avoid unnecessary air intake during the
filtration by ensuring, for example, that the
inlet end of the intake tubing is kept below
the surface of the liquid being filtered. Oth-
erwise, particularly when using Sartolab P20
Plus, a pocket of air may build up above the
membrane, resulting in partial or complete
"blocking" of the membrane. Should this
occur, however, pump all of your solution
out of the system first, then continue the
filtration run as described in step 6.7.
6 |

7. Chemical Compatibility

As mentioned above, the Sartolab P20/
Sartolab P20 Plus is designed for filtration of
aqueous solutions – not for organic solvents,
alcohols, acetone, surfactants (emulgators),
strong acids or bases. For such purposes,
we recommend the Sartorius Stedim Biotech
Midisart 2000 units, containing a PTFE
membrane, order no. 17804E (0.45 μm pore
size) or 17805E (0.2 μm pore size).
In the interest of the further development
of Sartorius Stedim Biotech products, we
reserve the right to make changes to the
design or specifications without notice.