Catalog Number - 95025-08-1S

The 95025-08-1S BASIK Headspace Caps are engineered for high‑purity headspace GC applications, featuring white silicone rubber / white PTFE septa manufactured for ultra‑low bleed, durability, and minimal extractables.

Designed for 20 mm crimp‑top headspace vials, these caps include a 10 mm center hole for reliable autosampler needle access while maintaining a secure crimp seal critical for volatile sample containment.

High‑Purity Silicone/PTFE Septa – Ultra Clean Performance

• White silicone rubber / white PTFE construction

• 3.0 mil (0.0762 mm) cast PTFE liner

• Proprietary formulation for:

  • Ultra‑low bleed

  • Low extractables

  • High chemical purity

✅ Ideal for trace‑level and high‑sensitivity GC analyses

Optimized Septa Properties – Soft & Durable

• Thickness: 3.16 mm (± 0.01 mm)

• Durometer: 45 Shore A (softer than standard)

• Provides:

  • Easier needle penetration

  • Reduced needle wear

  • Improved sealing after injection

✅ Enhances autosampler performance and reproducibility

Wide Temperature Range – Headspace Ready

• Operating range:

  • -60°C to 200°C

• Suitable for:

  • Heated headspace applications

  • Volatile and semi‑volatile compounds

✅ Ensures stable performance under thermal cycling conditions

10 mm Center Hole – Efficient Needle Access

• Open center hole allows:

  • Smooth autosampler needle entry

  • Reduced septa stress

✅ Improves injection consistency and throughput

Crimp Top Design – Secure Seal Integrity

• 20 mm aluminum crimp cap

• Provides:

  • Airtight sealing

  • Reduced evaporation and sample loss

✅ Critical for headspace GC analysis and volatile samples

Designed for 20 mm Headspace Vials

• Compatible with:

  • 20 mm crimp‑top headspace vials

• Ensures:

  • Proper fit

  • Reliable sealing

✅ Supports accurate and repeatable results

Typical Applications

• Headspace GC analysis

• Volatile organic compound (VOC) testing

• Pharmaceutical and environmental analysis

• Food and flavor testing

• High‑sensitivity analytical workflows

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Softer septa:

  • Improves penetration

  • Maintains durability under repeated use

• Ideal when:

  • Low bleed and high purity are required