Catalog Number - 95025-03-1S

The 95025-03-1S MICROSOLV Headspace Caps utilize Pharma‑Fix™ septa technology, combining butyl rubber elasticity with a PTFE laminated sample‑contact surface to provide an optimal balance of seal integrity and chemical inertness.

These caps are fitted in 20 mm aluminum crimp closures with a 10 mm center hole, ensuring consistent autosampler needle penetration and reliable sealing for headspace GC applications.

Pharma‑Fix™ Septa – Optimized Dual‑Material Performance

• Grey butyl rubber with PTFE laminate on sample side

• Combines:

  • PTFE inertness (sample contact side)

  • Butyl elasticity (vial sealing side)

• Minimizes:

  • Sample interaction

  • Extractables and contamination

✅ Ideal for analytical workflows requiring both sealing strength and chemical compatibility

Partial Lamination Design – Best of Both Materials

• PTFE layer only on light grey (sample-facing) side

• Butyl rubber contacts glass vial for:

  • Enhanced sealing

  • Reduced leakage risk

✅ Delivers superior seal compared to fully laminated or PTFE-only designs

Enhanced Sealing Performance – Elastic Butyl Core

• Durometer: 50 Shore A

• Thickness: 3.0 mm

• Provides:

  • Excellent resealing after puncture

  • Strong mechanical seal

✅ Ideal for multi‑injection autosampler workflows

Temperature Compatibility – Headspace Ready

• Operating range:

  • -40°C to 120°C

✅ Suitable for standard headspace GC conditions

10 mm Center Hole – Autosampler Optimization

• Open center design allows:

  • Smooth needle penetration

  • Reduced septa stress

✅ Improves injection consistency and throughput

Crimp Top Design – Secure Sample Containment

• 20 mm aluminum crimp cap

• Provides:

  • Airtight seal

  • Reduced evaporation

  • Reliable containment of volatile compounds

✅ Critical for accurate headspace analysis

Designed for 20 mm Headspace Vials

• Compatible with:

  • 20 mm crimp‑top headspace vials

• Ensures:

  • Proper fit

  • Reliable performance

✅ Supports reproducible analytical results

Performance Positioning – Premium Balanced Option

• Compared to butyl-only:

  • ✅ Improved chemical resistance

• Compared to full PTFE systems:

  • ✅ Better sealing performance

  • ✅ Lower leakage risk

✅ Ideal for regulated, pharmaceutical, and sensitive GC applications

Typical Applications

• Headspace GC analysis

• Pharmaceutical QA/QC and stability testing

• Environmental VOC analysis

• Food and flavor testing

• Sensitive analytical workflows

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Orientation matters:

  • PTFE side faces sample

  • Butyl side seals against vial

• Best suited for:

  • Applications requiring both inertness and strong sealing