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Septum Size Chart



Performance Recommendations

Avoid touching the septum with the fi ngers, in order to avoid a contamination from the fi lth of the user fi ngers.
Put the lid on the septa container once it has been opened, to avoid cross contamination.
Change the septum periodically - at least once a week -, this will avoid the leaks through the septum with the consequent losses of time and possibility to damage the column in an irreversible way.
It is preferable to change the septum at the end of the day, maintaining a high oven temperature to avoid the accumulation of bleed during the night. Alternatively, make a temperature programming for the following day to eliminate contaminant traces of septum volatiles.
Once the septum has been changed, verify the fl ow at the end of the column or the pressure at the entry, to make it sure that the septum has been correctly sealed.
Do not screw up the septum with the nut more than it is necessary.
Use a guide for the needle to prolong the syringe and septum life.
The guide helps to inject always in the same place, and avoids random perforations that may cause leaks.
Use needles with narrow outer diameters to avoid the loss of small pieces of septum; this will increase the septum useful life and will avoid the appearance of tails with active compounds.
In case of working with a high sensitivity detector, it is necessary to put the septum in the injection port all the night to obtain the least possible bleed.


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Septum Chart per Instrument
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Septum Size Chart

Select your product

ModelInstrumentSeptum Size (mm)
Agilent (HP)
5880A, 5890, 6890, 6850
11
Agilent (HP)
5700, 5880
9.5/10
Agilent (HP)
On-Column Injection
5
CE Instruments (TMQ)
TRACE GC
17
Finnigan (TQM)
GC 9001
9.5
Finnigan (TQM)
GCQ
9.5
Finnigan (TQM)
GCQ w/TRACE
17
Finnigan (TQM)
QCQ
9.5
Finnigan (TQM)
TRACE 2000
9.5
Fisons/Carlo Erba (TQM)
8000 Series
17
PerkinElmer
Sigma Series
11
PerkinElmer
900, 990
11
PerkinElmer
8000 Series
11
PerkinElmer
Auto SYS
11
PerkinElmer
Auto SYS XL
11