Preparing for Operation
Selecting and installing syringes
49
Selecting and installing syringes
Selecting syringes
Select the type of syringe you need based on the inlet (injection port) you are
using and the volume of sample you want to inject.
1. The syringe needle must have a cone tip. Do not use sharp-tipped needles.
These needles tear the inlet septum causing leaks. Also, sharp-tipped
needles wipe off on the septum as they exit resulting in a large solvent tail
on the chromatogram.
Figure 34. Needle tip
Figure 35 illustrates some of the critical syringe dimensions. These
dimensions do not make up a complete set of specifications. Some of the
dimensions are too difficult to measure without special instruments.
Figure 35. Syringe dimensions
Sharp tip
Cone tip
12.5
126.5
84.5
6.6 0.1
All dimensions in millimeters
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