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5.2.3 Cleaning
5.2.4 Waste Solution Tube
(2)
When using a saline solvent
When a saline solvent is used as a mobile phase, salt may
precipitate in the flow path to clog it or scratch the seal face of
valve. After using such a solvent, wash the flow path
adequately with distilled water.
(3)
When using an organic solvent
When the instrument using an organic-solvent mobile phase
will not be operated for 1 week or longer, wash the sample
line adequately with a solvent capable of dissolving all
samples injected into the line and their chemical constituents,
and replace the contents with the organic solvent.
(1)
Clean the rinse port periodically. If the port is contaminated,
reproducibility of analytical results may be degraded and/or
carry-over may increase.
(2)
Clean the solvent filter for detergent periodically. (Refer to
5.3.10) If the filter is clogged, the detergent will not flow and
performance may become poor.
The waste tubes in the system are made of materials having a high
chemical resistance (EPDM: ethylene propylene diene monomer).
For these tubes, however, be careful about use of solvents such as
benzene, chloroform, hexane, toluene, xylene, THF
(tetrahydrofuran) and acids.
If the above solvents are used, periodically check the tubes and
their joints. After shutdown, be sure to wash them with a solvent
capable of dissolving the used solvent.
5 - 9
5.2.3
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