22
Order online at www
.agilent.com/chem/store
Selecting Vial Septa Materials
Vial cap septa are critically important to optimal analysis. Each septum complements
the overall system and enhances chemical performance. Agilent's vial cap septa are
specifically formulated and constructed for optimum system performance, with minimal
coring and superior chemical inertness.
To determine potential septa
quantities, consider:
• The number of samples
run during a day/week.
•
If samples are run in small
or large batches.
• If samples are run manually
or with an autosampler
.
• If samples are run overnight,
unattended.
Tips & Tools
Type Uses
Red Rubber/PTFE
• Routine analysis
• Moderate resealing
• Excellent chemical inertness
• Not recommended for multiple injections or storage of samples
• Least expensive
Silicone/PTFE
• Excellent resealing
• Resists coring
• Good for multiple injections
PTFE/Silicone/PTFE
• Used in trace analysis applications
• Above average resealing
• Most resistant to coring
• Least evaporation
• Use with large diameter, blunt tip syringe needles
PTFE Disc
• Good for MS and ECD analysis
• Good for large-volume injections
• Chemically inert
• No resealing
• Single injection
• No long-term sampling storage
Viton
• Chlorinated solvents
• Organic acids
• Limited resealing
• Not suitable for 32 guage syringe
To Next Page
Loading...
Need help?
General
