Caps, Snap Top, with PTFE, ultra-pure, 2mil Septa, fitted in smooth, polyethylene, Blue Caps. For use with 11mm, 12x32mm, Snap Top autosampler vials. AQR Brand. 100/PK.
Additional Info:
The 9509C-50CB AQR™ Snap Caps are designed for high‑purity chromatographic applications, featuring ultra‑clean 2 mil PTFE septa that deliver maximum chemical inertness and minimal background interference.
These caps are constructed with smooth polyethylene snap closures and are compatible with 11 mm, 12 × 32 mm snap‑top autosampler vials, making them ideal for HPLC, LC‑MS, and general analytical workflows requiring clean sample handling.
Ultra‑Pure PTFE Septa – Maximum Inertness
2 mil PTFE (polytetrafluoroethylene) septa only
No silicone backing
Minimizes:
Extractables
Leachables
Background signal
✅ Ideal for sensitive analytical applications
Designed for Single Injections & Non‑Volatile Samples
PTFE‑only septa do not reseal after puncture
Best suited for:
Single injections
Non‑volatile samples
✅ Eliminates risk of contamination from resealing materials
Snap‑Top Convenience – Fast & Secure Fit
11 mm snap‑top design
Smooth polyethylene cap construction
Easy to:
Apply
Remove
✅ Enables quick vial preparation and handling
Standard Autosampler Compatibility
Fits:
11 mm snap‑top vials
12 × 32 mm autosampler vials
✅ Compatible with most HPLC and LC‑MS autosamplers
Polyethylene Cap Construction
Blue polyethylene caps
Smooth design for:
Reliable sealing
Consistent performance
✅ Provides durability and ease of use
Typical Applications
HPLC and LC‑MS analysis
Single‑injection sample workflows
Non‑volatile sample testing
Pharmaceutical and environmental analysis
Important Usage Notes
PTFE‑only septa will not reseal after puncture
Not recommended for:
Multiple injections
Volatile samples
✅ Use silicone/PTFE septa when resealing is required