Catalog Number - 95025-09-2S

The 95025-09-2S BASIK Headspace Caps provide a high‑purity, ready‑to‑use solution for demanding headspace GC applications, combining ultra‑clean silicone/PTFE septa with a pressure‑relief aluminum cap design.

Fitted in 20 mm silver aluminum crimp caps with an 8 mm center hole, these caps offer enhanced sealing surface area, consistent autosampler access, and controlled venting for safety, making them ideal for volatile or pressurized sample environments.

Pressure Relief Design – Built‑In Safety

• Scored aluminum caps engineered to vent at ~3.0 ± 0.5 bar

• Helps prevent:

  • Vial rupture

  • Excess pressure buildup

• Protects:

  • Operators

  • Autosampler systems

✅ Ideal for pressurized or volatile headspace workflows

High Purity Silicone/PTFE Septa – Ultra Clean Performance

• Translucent silicone rubber / natural PTFE

• No added colorants

• Manufactured with proprietary process for:

  • Ultra‑low bleed

  • Low extractables

  • High chemical purity

✅ Excellent for trace‑level and high‑sensitivity analyses

Soft Septa – Easy Needle Penetration

• Durometer: 45 Shore A (soft formulation)

• Septa thickness: 3.0 mm

• Provides:

  • Reduced needle resistance

  • Smooth penetration

  • Less needle wear

✅ Improves autosampler consistency and reliability

8 mm Center Hole – Improved Sealing Area

• Smaller opening vs. 10 mm caps

• Provides:

  • Greater septa contact area

  • Enhanced sealing integrity

✅ Ideal for applications requiring tighter sealing with pressure relief

Wide Temperature Range – Headspace Ready

• Operating range:

  • -60°C to 200°C

✅ Suitable for:

• Heated headspace GC

• VOC and semi‑volatile analysis

• Broad analytical methods

Crimp Top Design – Secure Seal Integrity

• 20 mm aluminum crimp cap

• Provides:

  • Airtight sealing (until vent threshold)

  • Reliable volatile sample containment

✅ Ensures accurate and reproducible headspace results

Designed for 20 mm Headspace Vials

• Compatible with:

  • 20 mm crimp‑top headspace vials

✅ Ensures:

• Proper fit

• Consistent chromatography performance

Performance Positioning – High Purity + Safety Standard Option

• Compared to butyl septa:

  • ✅ Higher chemical inertness

• Compared to laminated systems:

  • ✅ Lower extractables

• Compared to custom ultra‑pure variants:

  • ✅ High performance with standard availability

• Compared to non‑relief caps:

  • ✅ Increased safety

✅ Ideal for:

• routine high‑sensitivity laboratories

• volatile sample testing

• balanced purity + safety requirements

Typical Applications

• Headspace GC analysis

• Pharmaceutical QA/QC

• Environmental VOC testing

• Food and flavor analysis

• Trace‑level contaminant detection

• Pressurized headspace workflows

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Pressure‑relief feature:

  • Designed to vent at defined pressure

  • Not intended for pressure retention above threshold

✅ Recommended for safety‑focused, high‑purity headspace analysis