Caps, Screw Top, with Silicone Rubber / PTFE, ultra-pure, Pre-Slit Septa, fitted in "knurled", polypropylene, Light Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials. AQR Brand. 1000/CS.
Additional Info:
The 9509S‑30C‑B‑M Ultra‑Pure Pre‑Slit Screw Caps (Case Pack) are engineered for maximum chemical inertness and minimal background interference, making them ideal for high‑throughput mass spectrometry laboratories.
Manufactured with non‑pigmented silicone rubber and PTFE septa (no dyes or fillers), these caps deliver exceptional cleanliness, ensuring reproducible results in trace‑level analytical workflows.
Pre‑Slit Septa – Optimized for Autosampler Performance
Precision pre‑slit design enables:
Smooth, low‑force needle penetration
Reduced septum coring
Reliable resealing across multiple injections
✅ Ensures consistent injection performance in automated workflows
Ultra‑Pure Materials – LC‑MS / GC‑MS Compatibility
Silicone rubber / PTFE septa without pigments or additives
Minimizes:
Background signal interference
Extractables and leachables
Optimized for:
LC‑MS / LC‑MS/MS
GC‑MS
✅ Ideal for high‑sensitivity and regulated analytical environments
9‑425 Cap Format – Broad Autosampler Compatibility
Fits 9‑425 thread vials
Designed for 12 × 32 mm autosampler vials
Compatible with:
Waters® Alliance systems
Waters® Acquity™ systems
Most standard autosamplers requiring pre‑slit septa
✅ Provides secure sealing and consistent autosampler operation
Polypropylene Cap Design
Durable knurled polypropylene construction
Easy handling for manual and automated workflows
Light blue color for quick identification
✅ Supports efficient workflow organization and lab consistency
Bulk Case Packaging – High‑Throughput Efficiency
Supplied as 1000 caps per case
Ideal for:
High‑volume laboratories
Routine LC‑MS testing environments
Reduces frequency of reordering and handling time
✅ Optimized for cost efficiency and continuous operation
Comparable to LC‑MS Certified Consumables
Performance aligned with LC‑MS‑certified vial closures
Designed for trace‑level reproducibility and reliability
✅ Suitable for regulated and high‑precision analytical workflows
Alternative Configuration
For applications requiring non‑pre‑slit ultra‑pure septa:
Helpful Resources & Links
Typical Applications
LC‑MS and LC‑MS/MS workflows
GC‑MS analysis
Pharmaceutical QC and validation
Environmental and food safety testing
High‑throughput sample analysis
Trace‑level detection methods
Important Usage Notes
Designed for 9‑425 thread autosampler vials (12 × 32 mm)
Optimized for systems requiring pre‑slit septa
Best suited for high‑sensitivity MS applications
Confirm compatibility with autosampler needle design and cycle parameters