Catalog Number - 9509S-30C-B

The 9509S‑30C‑B Ultra‑Pure Pre‑Slit Screw Caps are engineered for maximum chemical inertness and lowest background interference, making them ideal for mass spectrometry‑based chromatography applications.

Manufactured using non‑pigmented silicone rubber and PTFE septa with no dyes or fillers, these caps provide exceptional cleanliness and minimal extractables, ensuring reliable results in trace‑level analytical workflows.

Pre‑Slit Septa – Consistent Injection Performance

• Precision pre‑slit design for:

  • Smooth, low‑force needle penetration

  • Reduced septum coring

  • Consistent resealing after injection

✅ Ensures reproducible injection performance in autosamplers

Ultra‑Pure Materials – LC‑MS Compatibility

• Silicone rubber / PTFE septa with no added pigments or fillers

• Minimizes:

  • Background noise

  • Leachables and extractables

• Optimized for:

  • LC‑MS

  • GC‑MS

  • LC‑MS/MS

✅ Ideal for high‑sensitivity and regulated analytical environments

9‑425 Cap Format – Standard Autosampler Compatibility

• Fits 9‑425 thread vials

• Designed for 12 × 32 mm autosampler vials

Compatible with:

• Waters® Alliance systems

• Waters® Acquity™ systems

• Most standard HPLC/GC autosamplers requiring pre‑slit septa

✅ Provides secure sealing and consistent autosampler operation

Polypropylene Cap Construction

• Durable knurled polypropylene design

• Easy handling for manual or automated workflows

• Color‑coded light blue for quick identification

✅ Supports efficient lab organization and workflow consistency

Comparable to LC‑MS Certified Consumables

• Performance aligned with LC‑MS‑certified vial closures

• Designed for trace‑level reproducibility and reliability

✅ Suitable for regulated, high‑precision analytical methods

Alternative Configuration

For applications requiring non‑pre‑slit ultra‑pure septa:

• 👉 View non‑pre‑slit ultra‑pure caps (Catalog 9509S‑10C‑B)

Helpful Resources & Links

• 👉 View available case quantities and bulk ordering options

Typical Applications

• LC‑MS and LC‑MS/MS analysis

• GC‑MS workflows

• Pharmaceutical QC and validation labs

• Trace‑level analytical testing

• Environmental and food safety testing

• High‑throughput autosampler workflows

Important Usage Notes

• Designed for 9‑425 thread autosampler vials (12 × 32 mm)

• Optimized for systems requiring pre‑slit septa

• Ideal for sensitive MS‑based applications where contamination must be minimized

• Ensure compatibility with autosampler needle design and injection parameters