Catalog Number - 95025-11-1S

The 95025-11-1S BASIK Headspace Caps are a made‑to‑order configuration for high‑purity analytical applications, featuring natural silicone rubber with natural PTFE (10 mil) septa designed for low extractables and strong chemical compatibility.

These caps are fitted in 20 mm aluminum crimp closures with a 10 mm center hole, allowing consistent autosampler needle access while maintaining a secure, airtight seal for volatile sample integrity.

✅ Recommended for validated methods requiring this specific septa composition

Crimp Caps with Natural Silicone/PTFE Septa

Natural Silicone/PTFE Septa – High Purity Performance

• Natural silicone rubber / natural PTFE

• 10 mil PTFE liner thickness

• Minimizes:

  • Extractables

  • Background interference

✅ Ideal for sensitive GC headspace applications

Balanced Hardness – Reliable Sealing & Penetration

• Durometer: 50 Shore A

• Septa thickness: 2.5 mm

• Provides:

  • Good resealing after injection

  • Controlled needle penetration

  • Strong mechanical durability

✅ Suitable for routine and moderately demanding workflows

Wide Temperature Range – Headspace Ready

• Operating range:

  • -60°C to 200°C

✅ Compatible with:

• Heated headspace GC

• Volatile and semi‑volatile compounds

• Broad analytical method requirements

10 mm Center Hole – Autosampler Optimization

• Open center design allows:

  • Smooth needle entry

  • Consistent injection performance

✅ Supports efficient, high‑throughput autosampler workflows

Crimp Top Design – Secure Seal Integrity

• 20 mm aluminum crimp cap

• Provides:

  • Airtight sealing

  • 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 results

Positioning – Durable, Clean, General High‑Purity Option

• Compared to softer septa:

  • ✅ Better durability

• Compared to ultra‑low bleed systems:

  • ✅ More economical while still clean

• Compared to butyl:

  • ✅ Improved chemical resistance

✅ Ideal for:

• balanced performance + durability applications

Typical Applications

• Headspace GC analysis

• Pharmaceutical QA/QC

• Environmental VOC testing

• Food and flavor analysis

• Routine and sensitive analytical workflows

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Confirm specifications prior to ordering

• Best suited for:

  • consistent, validated analytical 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: