Special Topics
Performing cool on-column injection onto 250-µm and 320-µm columns
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2. Remove the small metal plate from the foot.
3. Remove the needle guide, and replace it with a new one.
4. Replace the metal plate.
5. Replace and finger-tighten the screw.
6. Finish tightening the screw with a 2-mm Allen wrench.
Figure 85. Needle support foot for 250-µm injection
Screw
Needle guide
Metal plate
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