Catalog Number - 9509C-31CB

The 9509C‑31CB Ultra‑Pure Snap Caps with Star‑Slit Septa are engineered for maximum injection consistency and minimal background interference, making them ideal for LC‑MS/MS and high‑sensitivity analytical applications.

These caps use ultra‑pure silicone rubber and PTFE septa with no added pigments or fillers, ensuring extremely low extractables and contamination, critical for trace‑level detection.

Star‑Slit Septa – Expanded Target Area

• Unique star‑shape (*) slit design provides:

  • Larger target area for autosampler needles

  • Easier needle alignment

  • Smooth, low‑force penetration

✅ Reduces injection variability and improves autosampler efficiency

⚠️ May provide slightly less resealing performance compared to standard pre‑slit septa

Ultra‑Pure Materials – LC‑MS/MS Optimized

• Silicone rubber / PTFE septa with no added colorants

• Minimizes:

  • Background signal interference

  • Leachables and extractables

✅ Designed for LC‑MS/MS and trace‑level analysis

11 mm Snap Cap Format – Fast, Secure Sealing

• Fits 11 mm snap top autosampler vials

• Designed for 12 × 32 mm vials

✅ Enables quick sealing and consistent autosampler operation

Polyethylene Cap Construction

• Smooth polyethylene cap design

• Easy handling for high‑throughput workflows

• Light blue color for fast visual identification

✅ Supports efficient lab workflow and organization

Optimized for LC‑MS/MS Applications

• Ideal when:

  • low injection resistance is critical

  • needle alignment variability must be minimized

• Enhances performance in:

  • high‑throughput autosamplers

  • sensitive MS detection workflows

✅ Recommended for LC‑MS/MS applications requiring reproducibility and sensitivity

Typical Applications

• LC‑MS/MS analysis

• High‑throughput autosampler workflows

• Pharmaceutical QC and validation labs

• Environmental and food testing

• Trace‑level analytical methods

Important Usage Notes

• Designed for 11 mm snap top autosampler vials (12 × 32 mm)

• Best suited for applications prioritizing ease of penetration over reseal strength

• Recommended for LC‑MS/MS workflows

• Confirm compatibility with autosampler needle type and injection method