Sample Vials 5
Operation 39
Sample Vial Septa and Caps
There are two types of septa used with crimp caps and
screw- on caps, each with different resealing characteristics
and different resistance to solvents.
Vial caps come with or without an internal safety feature
that allows the vial to vent if the internal vial pressure
exceeds about 310 kPa (45 psi).
In general, do not use crimp caps or septa more than once
for headspace analysis.
Refer to your Agilent catalog for consumables and supplies
for acceptable vial types, or visit the Agilent website at
www.agilent.com/chem.
Septum material Compatible with Incompatible with Resealability Maximum
temperature*
PTFE/butyl rubber PTFE resistance until punctured,
then septa or liner will have
compatibility of rubber (ACN,
acetone, DMF, alcohols,
diethylamine, DMSO, phenols)
Chlorinated solvents,
aromatics,
hydrocarbons, carbon
disulfide
Good < 125 °C
PTFE/silicone rubber PTFE resistance until punctured,
then septa will have compatibility
of silicone (alcohol, acetone, ether,
DMF, DMSO)
ACN, THF, benzene
chloroform,
pyridine, toluene,
hexane, heptane
Average < 180 °C
* Approximate. Refer to manufacturer’s recommendations.
To Next Page
Loading...
Need help?
General
