Routine Maintenance: Inlets
Maintaining a cool on-column inlet
Released: March 2004 6850 Series II GC User Information page 170 of 256
Check the needle-to-column size
Caution This applies to 250 µm and 320 µm columns only.
After selecting an insert and before installing a column, you need to check the
needle-to-column size to make certain your needle fits in the column. You
could bend the needle if you try to inject it into a smaller column. Use the
insert that is the same size as your syringe needle to verify that the column you
plan to use is the correct size.
1. Identify the correct insert.
2. Insert the column into one end of the insert as shown below.
3. Insert the syringe needle through the other end of the insert and into the
column. If the needle cannot pass easily into the column, reverse the insert
to try the needle and column in the other end.
If the needle still cannot pass into the column, you may have a column with an
incorrect id. Check the column to make sure it is labeled correctly, and try a
new column.
Column
Insert
Syringe
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