Advantages of snap-on caps
- No crimper needed: saves time and eliminates the risk of incorrectly crimped seals
- Consistent sealing: every snap cap provides the same closing pressure, regardless of the operator
- Easy to open: snap caps can be removed from the vial in one movement
- Reusable septum: when using a filled liner, the septum is interchangeable
- 5 colours available: for colour-coded sample organisation per project, matrix or method
Septum variants
Brown supplies snap-on caps in two basic versions: with a moulded linerless septum (0.25 mm, for single use) and with 5 different liners pre-assembled in the cap. The available liners:
| Septum | Property | Application |
|---|
| PTFE | Chemically inert, single use | General |
| Silicone/PTFE | Excellent resealability | Multiple injections |
| PTFE/Silicone/PTFE | Reduces coring | Trace-analyse |
| Rubber/ETFE | Economical | Routineanalyse |
| Linerless (moulded 0.25 mm) | Single use, no liner | High-volume routine work |
| Silicone/PTFE single slit | Pre-slit | Easy needle penetration |
| Silicone/PTFE cross slit | Pre-slit | Better resealability after injection |
| Silicone/PTFE star slit | Pre-slit | Minimal resistance during injection |
Snap-on caps 8 mm
For use with all autosampler vials with an 8 mm crimp neck, such as the limited volume vials for Agilent, Perkin-Elmer, SGE and Unicam. Compatible with most 8 mm crimp-top autosampler systems.
| Cat. no. (natural) | Septum |
|---|
| 153410 | PTFE |
| 153415 | PTFE/Silicone/PTFE |
| 153420 | Silicone/PTFE |
| 153425 | Rubber/ETFE |
| 153430 | Linerless (moulded 0.25 mm) |
| 153435 | Silicone/PTFE single slit |
| 153440 | Silicone/PTFE cross slit |
| 153445 | Silicone/PTFE star slit |
All versions also available in red, blue, yellow and green. Per 100 pieces.
Snap-on caps 11 mm
The most widely used size for standard and wide opening 2.0 ml autosampler vials (12×32 mm). Compatible with crimp-top vials from Agilent, Perkin-Elmer, Shimadzu, Thermo, Varian and Waters.
Agilent OEM references: 5182-0540 (PTFE), 5182-0566 (PTFE/Silicone/PTFE), 5182-0541 (Silicone/PTFE), 5182-0542 (Rubber/ETFE), 5182-0550 / 5182-0874 / 5182-0873 / 5182-0860 (Rubber/ETFE in colour)
| Cat. no. (natural) | Septum |
|---|
| 153310 | PTFE |
| 153315 | PTFE/Silicone/PTFE |
| 153320 | Silicone/PTFE |
| 153325 | Rubber/ETFE |
| 153330 | Linerless (moulded 0.25 mm) |
| 153335 | Silicone/PTFE single slit |
| 153345 | Silicone/PTFE cross slit |
| 153340 | Silicone/PTFE star slit |
All versions also available in red, blue, yellow and green. Per 100 pieces.
Snap-on caps 13 mm
For use with autosampler vials with a 13 mm crimp neck, such as 4.0 ml vials (15×45 mm) for Shimadzu, Perkin-Elmer and Waters systems.
| Cat. no. (natural) | Septum |
|---|
| 158110 | PTFE |
| 158115 | PTFE/Silicone/PTFE |
| 158120 | Silicone/PTFE |
| 158125 | Rubber/ETFE |
| 158130 | Linerless (moulded 0.25 mm) |
| 158135 | Silicone/PTFE single slit |
| 158140 | Silicone/PTFE cross slit |
| 158145 | Silicone/PTFE star slit |
All versions also available in red, blue, yellow and green. Per 100 pieces.
Snap-on caps 20 mm
For use with headspace vials, injection vials and serum bottles with a 20 mm crimp neck. Available in two heights (low and high) and with a 5 mm or 8 mm hole for syringe access.
| Cat. no. | Version | Septum | Gat |
|---|
| 158250 | Low | Silicone/PTFE | 5 mm |
| 158260 | Low | Butyl/PTFE | 5 mm |
| 158255 | High | Silicone/PTFE | 5 mm |
| 158256 | High | Silicone/PTFE | 8 mm |
| 158265 | High | Butyl/PTFE | 5 mm |
| 158266 | High | Butyl/PTFE | 8 mm |
The low version is suitable for vials with a lower neck rim; the high version for vials with a higher rim. Choose the 8 mm hole when you work with a thick needle or SPME.
Colour coding: overview in the autosampler tray
All snap-on caps are available in 5 colours: natural, red, blue, yellow and green. By combining different colours with your sample series, calibration series or methods, you keep a quick overview of the tray and reduce the risk of mix-ups.
Every septum variant is available in all 5 colours, so colour and septum choice are completely independent of each other.
Snap-on caps or crimp seals: when to choose which?
Snap-on caps are the better choice when:
- You do not have or do not want to purchase a crimper
- Speed and simplicity in closing vials are a priority
- Consistency between operators is important
- You work with a high sample volume in routine analyses
Aluminium crimp seals are preferred when:
- Maximale hermeticiteit vereist is
- Your autosampler builds up internal pressure in the vial
- You work with volatile compounds where any possible leakage must be avoided
Not sure? Contact Inacom for advice based on your autosampler and application.