Catalog Number - 95025-04-1S

The 95025-04-1S MICROSOLV Headspace Caps are engineered for high‑sensitivity headspace GC applications, featuring translucent blue silicone rubber / white PTFE septa that are fully laminated on both sides for maximum chemical resistance and minimal extractables.

Designed for 20 mm crimp‑top headspace vials, these caps include a 10 mm center hole for consistent autosampler needle access while maintaining a secure, airtight seal.

Fully Laminated Silicone/PTFE Septa – Maximum Inertness

• Silicone rubber laminated with PTFE on both sides

• Provides:

  • Superior chemical resistance

  • Minimal sample interaction

  • Reduced extractables and background

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

Soft Septa – Easier Needle Penetration

• Durometer: 45 Shore A (soft formulation)

• Septa thickness: 3.0 mm

• Provides:

  • Reduced needle force

  • Smooth penetration

  • Lower needle wear

✅ Improves autosampler performance and injection reproducibility

Wide Temperature Range – Headspace Ready

• Operating range:

  • -60°C to 200°C

✅ Suitable for:

• Heated headspace GC

• Volatile and semi‑volatile compounds

• Broad analytical conditions

10 mm Center Hole – Standard Autosampler Access

• Open center design allows:

  • Consistent needle entry

  • Reduced septa stress

✅ Supports efficient high‑throughput workflows

Crimp Top Design – Secure Seal Integrity

• 20 mm aluminum crimp cap

• Provides:

  • Airtight sealing

  • Reduced evaporation

  • Reliable volatile sample containment

✅ Essential for accurate headspace GC analysis

Designed for 20 mm Headspace Vials

• Compatible with:

  • 20 mm crimp‑top headspace vials

✅ Ensures:

• Proper fit

• Consistent analytical performance

Performance Positioning – Premium High‑Purity Option

• Compared to butyl septa:

  • ✅ Greater chemical inertness

• Compared to partial laminate (Pharma‑Fix™):

  • ✅ Lower extractables and interaction

• Compared to ultra‑low bleed custom options:

  • ✅ High performance with standard availability

✅ Ideal for:

• sensitive GC methods

• regulated labs

• trace and purity analyses

Typical Applications

• Headspace GC analysis

• Pharmaceutical QA/QC

• Environmental VOC testing

• Food and flavor analysis

• Trace‑level contaminant detection

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Fully laminated septa:

  • Provide maximum inertness

  • Maintain good resealing for multiple injections

✅ Recommended for high‑purity, general‑to‑sensitive headspace workflows