Special Topics 11
Installation, Operation, and Maintenance 183
Part 3, Maintenance and Troubleshooting
Cool On-Column Injection
For GCs with a cool on-column inlet, the 7683A/B injector can perform
injections directly onto 250-µm, 320-µm, and 530-µm columns. For a list of
consumables needed to perform these injections, see “Replacing Syringe
Needles" on page 107.
When performing cool on-column injections, the injector:
• Slows the carriage speed so the overall injection time increases to
500 milliseconds.
• Lowers the tip of the syringe needle an additional 19 mm into the column.
If you need to adapt your injector for cool on-column injection, change the
inlet column diameter, or change the septum nut or cool on-column insert,
refer to “Adapting For Cool On-Column Injection" on page 139.
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