Catalog Number - 95025-11-2-1S

The 95025-11-2-1S BASIK Headspace Caps are a made‑to‑order, high‑purity configuration designed for headspace GC applications requiring clean baselines and reliable sealing.

These caps feature natural silicone rubber with natural PTFE (5 mil) septa, offering a balance of chemical inertness and flexibility, and are fitted in 20 mm aluminum crimp closures with a 10 mm center hole for consistent autosampler needle access.

✅ Recommended for validated workflows requiring this exact septa thickness and composition

• Crimp Caps with Natural Silicone/PTFE Septa (5 mil)

Natural Silicone/PTFE Septa – Balanced High Purity Performance

• Natural silicone rubber / natural PTFE

• 5 mil PTFE liner thickness

• Provides:

  • Good chemical inertness

  • Reduced extractables

  • Clean chromatographic baselines

✅ Ideal for routine to moderately sensitive headspace GC applications

Optimized Thickness & Durability

• Septa thickness: 3.0 mm

• Durometer: 50 Shore A

• Provides:

  • Controlled needle penetration

  • Good resealing after injection

  • Mechanical durability

✅ Suitable for multi‑injection workflows

Wide Temperature Range – Headspace Ready

• Operating range:

  • -60°C to 200°C

✅ Compatible with:

• Heated headspace GC

• Volatile and semi‑volatile analytes

• Broad analytical methods

10 mm Center Hole – Consistent Autosampler Access

• Open center design allows:

  • Smooth needle entry

  • Reduced septa stress

✅ Ensures repeatable, high‑throughput injections

Crimp Top Design – Secure Sealing

• 20 mm aluminum crimp cap

• Provides:

  • Airtight seal

  • Reduced evaporation

  • Reliable containment of volatile samples

✅ Essential for accurate headspace analysis

Designed for 20 mm Headspace Vials

• Compatible with:

  • 20 mm crimp‑top headspace vials

✅ Ensures:

• Proper fit

• Consistent analytical performance

Performance Positioning – Balanced PTFE Option

• Compared to 10 mil PTFE versions:

  • ✅ Lower cost

  • ✅ Easier penetration

• Compared to thinner laminates:

  • ✅ Improved chemical barrier

✅ Ideal when balancing cost, penetration ease, and inertness

Typical Applications

• Headspace GC analysis

• Pharmaceutical QA/QC

• Environmental VOC testing

• Food and flavor analysis

• Routine analytical workflows

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Confirm specifications prior to ordering

✅ Best suited for:

• routine to moderately sensitive headspace GC methods

Made‑to‑Order & Pricing Information

This is a custom, made‑to‑order item.

• Please contact Customer Service for formal quotation, lead time, and ordering assistance. Classification: