Metrohm 872 Extension Module Liquid handling - Manual (Page 16)

3.2 Transfer tubing
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872 Extension Module – Liquid handling
3.2 Transfer tubing
The transfer tubing – a long coiled tubing (V=15 mL) – is used both for
"storing" various liquids and in order not to contaminate the Dosino with
these liquids. These liquid segments can be separated from one another
with air bubbles or water. With its pedestal (5-3), the transfer tubing can
be placed in one of the recesses of the bottle holder.
1
2
3
Figure 5 6.1562.160 transfer tubing
1 Connector to the Dosino 2 Connector to the 10-port valve
3 Pedestal
For placing into the 6.2057.200 bottle
holder.
The transfer tubing is connected by means of a connector (5-2) with the
central position of the 10-port valve and by means of another connector
(5-1) with a Dosino.
The Dosino is responsible for the transport and dosing of the liquids and is
filled with a transfer solution (usually water). It can move defined volumes
of liquids in two directions: aspirate and eject.
￭ During aspiration, the liquid is suctioned out of the active position of
the 10-port valve through the central position and into the transfer
tubing.
￭ During ejection, the liquid that has collected in the transfer tubing is
transported through the central position of the 10-port valve and from
there to the active position.