Vials and Bottles 6
Installation, Operation, and Maintenance 113
Part 2, Operation
When developing your method, keep the following in mind:
• If you need to test a large amount of sample over repeated injections, divide
the sample among several vials to obtain reliable results.
• When sample volume in the vial is low, contaminants from the previous
sample injection or solvent washes may have a greater impact on the
sample.
If you change suppliers, you may need to redevelop your method. Differing
manufacturing practices for vial hardware sometimes cause variances in your
results.
Capping sample vials
When a tray is not installed, you may be able to use sample vials with diffusion
caps, snap-on caps, or screw-on caps depending on your application. If a tray
is used, sample vials should have crimp caps or screw caps installed. Snap
caps are not recommended. See Figure 48.
To install the airtight crimp caps:
1 Clean the inside surfaces of the crimper jaws.
CAUTION
Do not inject air into the vials to prevent this vacuum. This often damages the cap seal
and may cause damaged syringe needles.
Figure 47 Recommended fill volumes for sample vials
3.6 mm*
1 mL
50 µL
100-µL vial
2-mL vial
* Needle position based on default sampling depth.
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