Metrohm 872 Extension Module Liquid handling - Manual (Page 9)

￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
1 Introduction
872 Extension Module – Liquid handling
￭￭￭￭￭￭￭￭ 1
1 Introduction
1.1 Instrument description
Existing 850 Professional IC instruments can be expanded to include addi-
tional functions by means of extension modules. Every 850 Professional IC
instrument can be supplemented with up to 3 extension modules.
The 872 Extension Module – Liquid handling extends the possibilities
of inline sample preparation and liquid handling. Up to six auxiliary solu-
tions can be provided in the instrument. A mixing vessel that can be
mounted on the instrument allows the mixing of different solutions. The
872 Extension Module – Liquid handling makes guard column reactions
and pH adjustments possible - and much more.
The extension module is operated with MagIC Net software, just like the
IC instrument. When it is connected to an 850 Professional IC instrument,
MagIC Net recognizes the extension module automatically and checks its
functional capability. It controls and monitors the IC instrument as well as
the extension module, evaluates the measured data and administers it in a
database.
The 872 Extension Module – Liquid handling comprises the following
components:
10-port valve
The 10-port valve is utilized for sample preparation and serves as a switch-
over point between different liquids.
Peristaltic pump
The Peristaltic pump is used for pumping sample and auxiliary solutions. It
can rotate in both directions.
Injection valve
In Liquid Handling the injection valve is used for the measurement of pre-
cisely defined smaller volumes. The liquid is measured in the sample loop
and injected into the sample preparation process by means of valve
switchover.