Caps, Snap Top, with Silicone Rubber / PTFE, ultra-pure, Pre-Slit Septa, fitted in smooth, polyethylene, Light Blue Caps. For use with 11mm, 12x32mm, Snap Top autosampler vials. AQR Brand. 100/PK.
Additional Info:
Fast, Reliable Needle Access with Snap‑Top Convenience
The 9509C‑30CB Snap Top Caps are designed for laboratories that prioritize fast sample handling and consistent autosampler needle response when using snap‑top autosampler vials. These 11 mm snap caps feature ultra‑pure silicone rubber / PTFE pre‑slit septa, allowing easy needle penetration while improving resealing performance relative to standard snap‑top septa designs.
Snap‑top caps do not provide the same sealing force as screw‑top systems, but they offer significantly faster handling and consistent septum positioning for routine and non‑critical autosampler workflows.
Pre‑Slit Septa for Improved Autosampler Performance
The integrated pre‑slit septa design reduces needle resistance during penetration, helping to improve:
Autosampler needle alignment and responsiveness
Injection repeatability during short runs
Septum resealing consistency compared to non‑slit snap caps
These characteristics make the caps well suited for repeated injections over short sequences, where smooth needle entry and predictable puncture behavior are required. These caps are fully compatible with Waters Acquity and Alliance Instruments.
Ultra‑Pure Silicone Rubber / PTFE for Low Extractables
The septa are manufactured from ultra‑pure silicone rubber and PTFE with no added colorants, minimizing extractables and contamination risk. This construction supports sensitive analytical workflows where background cleanliness is important, particularly during LC‑MS and LC‑MS/MS‑based analyses.
While suitable for LC‑MS/MS injections, snap‑top caps are best applied to shorter, non‑critical sequences rather than long unattended runs or volatile analytes where maximum seal integrity is required.
When to Use Snap‑Top Caps vs. Screw‑Top Caps
Snap‑top caps such as the 9509C‑30CB are intended for applications where speed, convenience, and autosampler responsiveness are prioritized.
Recommended for:
High‑throughput HPLC and LC‑MS screening
Routine analytical testing
Short autosampler sequences
Applications requiring fast vial access
Not recommended for:
Long autosampler dwell times
Volatile or evaporation‑sensitive analytes
Highly critical or regulated analyses
For maximum sealing performance, screw‑top cap systems are recommended.
Compatibility
These snap‑top caps are designed for use with:
11 mm snap‑top autosampler vials
12 × 32 mm vial formats
They are commonly paired with RSA™ and standard snap‑top vial designs used in routine laboratory workflows.
Package Contents
100 × snap‑top caps
Light blue polyethylene construction
Ultra‑pure silicone rubber / PTFE pre‑slit septa
AQR™ brand
Supplied as 100 caps per package
Typical Applications
High‑throughput HPLC analysis
Routine LC‑MS and LC‑MS/MS injections
Short‑run autosampler methods
Non‑critical analytical workflows