Metrohm 940 Professional IC Vario ONE/ChS - Manual (Page 53)

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3 Installation
940 Professional IC Vario ONE/ChS (2.940.1200)
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3.19 Connecting and rinsing the guard column
Guard columns protect the separation column and substantially increase
its service life. Guard columns available from Metrohm are either actual
guard columns or what are known as guard column cartridges that can be
used together with a cartridge holder. The process for installing a guard
column cartridge in the associated holder is described in the leaflet for the
guard column.
NOTE
Metrohm recommends working with guard columns at all times. They
protect the separation column and can be replaced regularly as needed.
NOTE
Information regarding which guard column is suitable for your separa-
tion column can be found in the Metrohm IC Column Program
(which is available from your Metrohm representative), the leaflet provi-
ded along with your separation column, the product information about
the separation column at
http://www.metrohm.com (Ion Chromatogra-
phy product area), or obtained directly from your representative.
CAUTION
New guard columns are filled with solution and sealed with stoppers or
caps on both sides.
Before inserting the guard column, ensure that this solution can be
mixed with the eluent being used (follow information from the manu-
facturer).
NOTE
The guard column may not be connected until after the instrument has
already been put into operation once (see Chapter 3.18, page 43). The
guard column and separation column have to be replaced by a coupling
(6.2744.040) until then.
Accessories For this step you need the following accessories: