BUCHI Multivapo P-12 - Manual (Page 33)

4 Description of function
33 Multivapor™ Operation Manual, Version E
4 .5 Blank adapters (optional)
Fig. 4.10: Blank adapters
If less than the maximum number of samples are
being evaporated, the vacant positions need to
be occupied either with empty sample tubes or
with the optional blank adapters. These adap-
ters consist of a closed bottom side but the
same outer dimensions as the standard adap-
ters.
It is not necessary to distribute the samples
equally across the crystal rack. It is therefore
possible to accommodate the front positions
with the samples and the back positions with the
blank adapters.
For very harsh conditions, such as evaporation
of trifluoro acetic acid (TFA), the adapters are
also available in PEEK.
4 .6 PE frits
In order to reduce contamination of the vacuum
cover by foaming samples or boiling retardation,
an optional porous PE frit can be placed into
the tube adapters closing the vapor duct. This
measure also allows sample adsorption onto
silica for chromatographic purposes (dry loading)
by retaining the silica inside the tube.
Fig. 4.11: PE frits
4 .7 Adapter spring
Springs on the top of the tube adapters are
optionally used to facilitate the opening of the
vacuum cover.
Fig. 4.12: Adapter spring