Vial closures with septum and stoppers

Our closures for autosampler and headspace vials are packed in clear screw-top PET bottles for an easy and contamination free handling in the laboratory.

All caps undergo a quality check upon arrival from production.

Aluminium crimp caps

  • with centre hole: 11 mm (ND11), 13 mm (ND13), 20 mm (ND20)
  • magnetic bimetal, 8 mm centre hole for CTC Combi PAL: 20 mm (ND20)
  • with pressure release covering the injection site, 8 mm centre hole: 20 mm (ND20)
  • with centre tear-off covering the injection site for quality assurance, 8 mm centre hole: 13 mm (ND13), 20 mm (ND20)
  • with complete tear-off covering the injection site for quality assurance, 8 mm centre hole: 13 mm (ND13), 20 mm (ND20)
  • FlipOff® with plastic FlipOff® button covering the injection site for quality assurance, 8 mm centre hole: 20 mm (ND20)

Screw caps

  • with centre hole, glass-fibre enforced polyamide: 9-425 (ND9)
  • with centre hole, polypropylene: 8-425 (ND8), 9-425 (ND9), 10-425 (ND10), 13-425 (ND13)
  • closed-top cap, polypropylene to be used in combination with butyl rubber stoppers: 15.5 mm, 22 mm

 

Snap caps

  • with centre hole, made from polyethylene: 11 mm (ND11)
  • with centre hole, made from polyethylene, designed for wash vials: 20 mm (ND20)

The available septum material is described in the taps below:

 

ms-Pure septum: non-pigmented silicone/PTFE septum

With the increasing sensitivity of the analytical instruments, extractable substances from the septum may contaminate the sample. The ms-Pure silicone/PTFE septum is produced from a natural non-pigmented silicone/PTFE. Tests show that it is 60 % cleaner than „standard“ silicone/PTFE septums on the market.

  • non-pigmented silicone of highest qualitylow bleeding
  • low bleeding
  • resists coring
  • excellent re-seal ability
  • intended for multiple injections
  • low compression set for storage reliability


This septum type is available with all closure types for autosampler vials including headspace.

Pigmented silicone/PTFE septum

In the days when septum and caps were assembled by hand in the laboratory, it helped when the PTFE side of the septum was easily identified. Therefore the silicone and PTFE was pigmented in different colours. With the increasing sensibility of the analytical instruments, the pigmentation may interfere with the analysis.

 

This septum type is available with all closure types for autosampler vials and our economic blueLine.

Natural rubber/PTFE septum

The natural rubber/PTFE septum was established as standard septum in the days when silicone was much more expensive than today.
 

This septum type is available with 11 mm aluminium crimp caps.

Butyl rubber and Butyl rubber/PTFE septum and stoppers

Butyl is a synthetic caoutchouc and is temperature resistant from -40°C to 120°C.

Without the PTFE layer this septum is an economic alternative for non-critical analysis (eg. in breweries or for blood alcohol analysis).
With a PTFE layer this septum is also suitable for critical analysis.


This septum type is available with the economic blueLine 11 mm aluminium crimp caps and 20 mm aluminium crimp caps as well as for injection stoppers and lyophilisation stoppers.

Septa suitable for PFAS testing

Classic chromatography septa have a PTFE coating on the side facing the sample. However, the PTFE would contaminate the sample in the PFAS analysis. Polypropylene or Polyimide is used instead of PTFE. Butyl caps are also available.

Another option is our KapOni-Pure caps (ND9) with a funnel instead of a septum. The funnel is made of inert, plasticiser-free polypropylene, which can be used in a wide temperature range from -0 °C to 100 °C. The funnel guides the syringe needle through the thin membrane of the injection site. Due to its shape, the funnel prevents evaporation of the sample even after multiple injections.

ZeroSept® Air - phthalate free Septum

The ZeroSept® Air septum gains its excellent sealing qualities from an air cushion trapped between two layers of high-purity PTFE foil which makes it also ideal for multiple injections.

When using a silicone or rubber septum, the needle piercing the septum will always carry some septum material into the sample which may lead to interfering peaks in the chromatogram. The ZeroSept® Air septum eliminates the risk of interfering peaks through coring. Tests proofed that the ZeroSept® Air septum also shows adequate sealing qualities over a period of 24 hours when used with multiple injections.

 

This septum type is available with 11 mm and 20 mm aluminium crimp caps.

ZeroSept® with O-ring and aluminium-/or PTFE foil

An O-ring made from fluoroplastic and with the same thickness as a common septum assures that the cap rests optimally on the vial head rim. In addition the crimping tool has not to be completely reset due to this place holder.

ZeroSept® ALUmono-O
Phthalate free septum consisting of an O-ring made from fluoroplastic and a thin aluminium foil.

ZeroSept® PTFEmono-O
Septum consisting of an O-ring made from fluoroplastic and a thin PTFE foil.

ZeroSept® PTFEmono
Septum consisting of thin PTFE foil.

 

These septum types are available with 11 mm aluminium crimp caps.

Application
Type
Closure size
Septum material
Specification

G004-HP-CS-SKPP10

Screw cap with silicone/polypropylene septum, for PFAS testing
Type
Screw cap
Closure size
filter.thread.9
Material
Polypropylene
Septum
Silicone non-pigmented
material thickness
1 mm

G094*-KOP02

Screw cap of glass fibre-reinforced polyamide with KapOni-Pure sealing element: funnel made of high-purity polypropylene with thin piercing point, suitable for PFAS analyses or aqueous samples
Type
Screw cap
Closure size
filter.thread.9
Material
Glass fiber reinforced polyamide
Septum
Polypropylene membrane
Specification
KapOni-Pure

G194*-SKFK10/09

9 mm screw cap with non-pigmented msPure silicone/PTFE septum, clear, 1 mm thick
Type
Screw cap
Closure size
ND9
Material
Glass fiber reinforced polyamide
Septum
ms-Pure Silicone/PTFE
material thickness
1 mm

G004-WM-CS-FKSKFK10

Screw cap with non-pigmented ms-Pure PTFE/silicone/PTFE septum
Type
Screw cap
Closure size
10-425
Material
Polypropylene
Septum
ms-Pure PTFE/Silicone/PTFE
material thickness
1 mm
Specification
Multiple injection

G004-WM-CS-Hi-SWFR10

Screw cap, with pigmented silicone/PTFE septum, white/red, pre-slit
Type
Screw cap
Closure size
10-425
Material
Polypropylene
Septum
Silicone/PTFE pigmented
material thickness
1 mm
Specification
Pre-slit

G004-WM-CS-SWFR10

Screw cap, with pigmented silicone/PTFE septum, white/red
Type
Screw cap
Closure size
10-425
Material
Polypropylene
Septum
Silicone/PTFE pigmented
material thickness
1 mm

8003-SC*-Te/Si/Te

cap, polypropylene, black, Snap/Crimp SC11, red PTFE/white silicone/red PTFE septum, Ø 11 mm
Type
Snap cap
Closure size
ND11 (Snap cap)
Material
Polypropylene
Septum
PTFE/Silicone/PTFE pigmented

"30% discount, while stocks last"
8C11-AC-ST101X

8C11-AC-ST101X

11 mm aluminium crimp cap with inserted approx. 1 mm thick, blue silicone/Teflon septum, pre-slit, especially suitable for Merk/Hitachi autosampler
Type
Crimp cap
Closure size
ND11
Material
Aluminium
Septum
Silicone blue/PTFE red
material thickness
1 mm

"30% discount, while stocks last"
11-MC-ST15

11-MC-ST15

11 mm magnetic crimp cap with inserted 1.3 mm thick white/red silicone/PTFE septum
Type
Crimp cap
Closure size
ND11
Material
bimetal, magnetic
Septum
Silicone/PTFE pigmented
material thickness
1.3 mm

"30% discount, while stocks last"
11-PEC-ST1

11-PEC-ST1

11 mm polyethylene SNAP CAP™ with inserted silicone/Teflon septum fits all 11 mm crimp vials
Type
Snap cap
Closure size
ND11 (Snap cap)
Material
Polyethylene
Septum
Silicone/PTFE pigmented
Bottle type
Snap/Crimp vial
Material
Polyethylene
Diameter
11 mm

"30% discount, while stocks last"

8C11-PSN(B)-8RT1

11 mm PE Snap Cap with inserted red rubber/Teflon septum
Type
Snap cap
Closure size
ND11 (Snap cap)
Material
Polyethylene
Septum
Butyl rubber/PTFE red

8F03-SC-CB-SWPY10

Snap cap with silicone/polyimide septum, for PFAS testing
Type
Snap cap
Closure size
ND11 (Snap cap)
Material
Polyethylene
Septum
white Silicone/red Polyimide
material thickness
1 mm