Catalog Number - 95025-04-4D

The 95025-04-4D MICROSOLV Headspace Caps are designed for high‑precision headspace GC applications, featuring transparent blue silicone rubber / transparent PTFE septa fully laminated for maximum chemical inertness and minimal extractables.

These caps are constructed with magnetic steel (gold finish), making them ideal for automated headspace systems requiring magnetic cap transport or handling, while maintaining a secure crimp seal for volatile samples.

Magnetic Steel Caps – Automated System Compatibility

• Steel caps with magnetic properties

• Designed for:

  • Automated headspace samplers

  • Robotic handling systems

• Gold finish for:

  • Easy visual identification

  • Corrosion resistance

✅ Ensures smooth operation in automated workflows

Fully Laminated Silicone/PTFE Septa – Maximum Inertness

• Transparent blue silicone rubber / transparent PTFE

• PTFE laminated on both sides

• Provides:

  • Excellent chemical resistance

  • Minimal extractables

  • Low background interference

✅ Ideal for trace‑level and high‑purity analyses

Soft Septa – Easy Needle Penetration

• Durometer: 45 Shore A (soft formulation)

• Septa thickness: 3.2 mm

• Provides:

  • Reduced needle resistance

  • Smooth penetration

  • Reduced needle wear

✅ Improves autosampler reliability and reproducibility

8 mm Center Hole – Enhanced Sealing Performance

• Smaller center opening increases:

  • Septa contact area

  • Seal reliability

• Maintains:

  • Consistent autosampler access

✅ Ideal for tight sealing in headspace applications

Wide Temperature Range – Headspace Ready

• Operating range:

  • -60°C to 200°C

✅ Suitable for:

• Heated headspace GC

• Volatile and semi‑volatile compounds

• Broad analytical methods

Crimp Top Design – Secure Seal Integrity

• 20 mm magnetic steel crimp cap

• Provides:

  • Airtight sealing

  • Reduced evaporation

  • Reliable containment of volatile samples

✅ 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 – Automation + High Purity Option

• Compared to aluminum caps:

  • ✅ Magnetic handling capability

• Compared to butyl systems:

  • ✅ Higher chemical inertness

• Compared to partial laminate septa:

  • ✅ Lower extractables

✅ Ideal for:

• automated labs

• high‑throughput workflows

• sensitive analytical methods

Typical Applications

• Automated headspace GC analysis

• Pharmaceutical QA/QC

• Environmental VOC testing

• Food and flavor analysis

• High‑throughput laboratory workflows

Important Usage Notes

• Requires 20 mm crimping tool for proper sealing

• Magnetic caps:

  • Designed for compatible autosampler systems

• Fully laminated septa:

  • Provide maximum inertness

  • Maintain good resealing

✅ Best suited for:

• automated and high‑sensitivity applications