Special Topics
Performing cool on-column injection onto 250-µm and 320-µm columns
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8. Check to make sure the needle is aligned with the needle guide in the foot
by moving the slide up and down. The needle should slide smoothly in the
needle guide.
Figure 84. Installing the syringe for 250- or 320-µm on-column injection
Replacing the needle guide in the needle support foot
You need to check the needle guide for wear whenever you change the inlet
septum. When the needle guide in the needle support foot shows signs of wear,
use the following steps to replace it:
1. With an Allen wrench, remove the black screw from the needle support
foot.
Slide
Flange
Plunger carrier
Flange guide for top
of the syringe barrel
Syringe latch
Syringe clip
Needle support foot
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