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Part 1. Capillary columns Columns and Traps
Procedure: Installing capillary columns in the FPD
1. Assemble a brass nut and graphite/Vespel ferrule onto the
adapter.
2. Insert the adapter straight into the detector base as far as possible. Hold the
adapter in this position and tighten the nut finger tight. Use a wrench to
tighten the nut an additional 1/4 turn.
3. Install a column nut (part no. 18740-20870) and graphite ferrule (1.0 mm ID,
part no. 5080-8773 or 0.5 mm ID, part no. 5080-8853) on the column.
4. After installing the nut and ferrule, prepare a fresh column end by cutting
off a short piece of the column. See page 101 for instructions.
5. Position the ferrule about 153 mm from the end of the column.
Optimum height depends on sample type and gas flow rates. If it is too high,
the column end will be exposed to the flame. If too low, the sample may be
exposed to hot stainless steel, causing slight tailing.
1/4-inch ferrule
1/4-inch nut
Capillary column adapter
Detector fitting
Capillary column adapter
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