Capillary Connections; Servicing The Door; Handling The Eluent - Metrohm 930 Compact IC Flex ChS Manual

5.2 Capillary connections

5.2 Capillary connections
5.3

Servicing the door

5.4

Handling the eluent

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All capillary connections between the injection valve, the separation col-
umn and the detector must be as short as possible, have a low dead vol-
ume and be completely leak-tight.
The PEEK capillary downstream of the detector must be free of blockages.
Use only PEEK capillaries with an inner diameter of 0.25 mm between the
high-pressure pump and the detector (high-pressure section).
CAUTION
The door is made of PMMA (poly(methyl methacrylate)). It must never
be cleaned with abrasive media or solvents.
CAUTION
Never hold the instrument by the door when lifting it. Only hold the
instrument by the housing.
Careful handling of the eluent ensures stable analysis results. Keep the fol-
lowing general measures in mind when handling the eluent:
The supply bottle with the eluent must be connected as indicated in
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chapter 3.5, page 19. This is particularly important for eluents with vol-
atile solvents (e.g. acetone).
Avoid condensation in the eluent bottle. Drop formation can change
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the concentration ratio in the eluent.
In the case of very sensitive measurements, we recommend that the
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eluent be stirred constantly with a magnetic stirrer (e. g. the
2.801.0010 with 6.2070.000).
To protect the IC system from foreign particles, we recommend aspirat-
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ing the eluent via an aspiration filter (see Chapter 3.5, page 19)
(6.2821.090). This aspiration filter must be replaced as soon as it turns
yellow but at least every 3 months.
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930 Compact IC Flex ChS (2.930.1200)