3.3 Analysis using capillary column
54
• The position of the silica wool shown on P. 5 3 is for
injection when using the AOC-20i auto injector.
• In case of manual injection, the needle goes deeper
into the insert than in the case of auto injection.
• Therefore, when packing silica wool for manual
injection, place septum at the base of the syringe
needle in order to adjust the needle length to 40 mm,
or change the position of the wool appropriately
according to the needle length.
3
Attach O-ring to glass insert.
Fluoride rubber O-ring
(1) Place the Fluoride rubber O-ring at approx. 4 mm
from the top of the glass insert.
(2) When inserting into the injection port, push the
glass insert until it touches the bottom of the
injection port.
This will fix the O-ring at 3 mm from the top of the
glass insert.
Graphite O-ring
• You don't need to place the graphite O-ring to the
glass insert before inserting.
• After inserting the glass insert into the injection port,
attach the graphite O-ring.
Septum
Approx. 40 mm
(a) AOC-20i syringe
(needle length 43 mm)
(b) Syringe (needle
length 50 mm)
When the needle length is different:
43 mm, 50 mm.
Pack silica wool evenly, without napping, and do not
pack it too tightly.
At preparation
Attaching fluoride rubber O-ring
Injection port
4 mm
O-ring
For split For splitless/WBI
Attaching Graphite O-ring
Graphite O-ring
Injection
port
3 mm
At inserting
• Insert the glass insert into the injection port using the
tweezers.
• When analyzing at inlet temperature of 400C or
higher, use graphite O-ring, which has high allowable
temperature limit.
• A suitable graphite O-ring differs according to the type
of glass insert. ALWAYS use an appropriate O-ring for
glass insert.
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