Catalog Number - 95020-26-S

The 95020-26-S MICROSOLV Headspace Caps are designed for SPME (Solid Phase Micro‑Extraction) applications using 18 mm precision thread (ND18) vials, combining a special‑shape silicone/PTFE septa with magnetic steel screw caps for automated handling and consistent performance.

These caps feature an 8 mm center hole and ND18 screw threads, allowing for quick, tool‑free sealing while supporting efficient autosampler operation and reliable sample containment.

SPME‑Style Septa – Optimized for Fiber Protection

• Dual‑profile septa design:

  • Thick outer ring for strong sealing

  • Thinner center target zone for penetration

• Provides:

  • Easier SPME fiber insertion

  • Reduced risk of fiber damage

  • Improved injection reproducibility

✅ Ideal for SPME autosampler workflows

High Purity Silicone/PTFE Septa – Clean Performance

• White silicone rubber / blue PTFE

• Provides:

  • Chemical inertness

  • Reduced extractables

  • Clean GC baselines

✅ Suitable for routine to sensitive headspace GC analysis

Screw Top Design – ND18 Precision Thread

• ND18 (18 mm precision thread)

• Enables:

  • Fast, tool‑free sealing

  • Convenience in manual and automated workflows

✅ Ideal for labs preferring screw‑top over crimp sealing

Magnetic Steel Caps – Automation Ready

• Steel caps with magnetic properties

• Supports:

  • Robotic handling

  • Autosampler compatibility

• Silver finish:

  • Clean visibility

  • Corrosion resistance

✅ Compatible with:

• CTC Combi PAL® autosamplers

• Other SPME‑capable automated systems

8 mm Center Hole – Balanced Access & Seal

• Provides:

  • Consistent fiber/needle access

  • Adequate sealing area

• Works with SPME septa design for:

  • Controlled penetration

  • Reliable sealing

✅ Ideal for automated SPME applications

Temperature Compatibility – Headspace Ready

• Suitable for:

  • Heated headspace GC

• Silicone/PTFE design supports:

  • Stability under analytical conditions

✅ Designed for SPME and headspace workflows

Designed for ND18 Headspace Vials

• Compatible with:

  • 18 mm precision thread (ND18) headspace vials

✅ Ensures:

• Proper fit

• Consistent analytical performance

Performance Positioning – Screw Top SPME Automation Option

• Compared to standard septa:

  • ✅ Reduced fiber damage

• Compared to crimp caps:

  • ✅ Faster sealing (no tools required)

• Compared to non‑magnetic screw caps:

  • ✅ Automated handling capability

✅ Ideal for:

• SPME workflows

• CTC Combi PAL® systems

• high‑throughput GC labs

Typical Applications

• SPME headspace GC analysis

• Environmental VOC testing

• Food and flavor analysis

• Pharmaceutical QA/QC

• Automated sampling workflows

Important Usage Notes

• Designed for ND18 screw‑top vials (not crimp top)

• Magnetic caps:

  • Require compatible autosampler systems

• SPME septa:

  • Optimized for fiber penetration

  • Not intended for heavy repeated needle injections

✅ Best suited for:

• SPME‑specific analytical methods