Catalog Number - 9509S-30B

The 9509S‑30B AQ™ Screw Caps are selected for high‑sensitivity chromatography workflows requiring low background interference, reliable resealing, and reproducible needle penetration. The bonded white silicone rubber/white PTFE pre‑slit septa design helps minimize septa movement, dislodgement, and septa plunge during repeated autosampler injections.

Manufactured with dark blue knurled polypropylene caps and ultra‑low bleed white PTFE pre‑slit septa, these caps are designed to reduce extractables and background signal in sensitive HPLC, LC‑MS, and LC‑MS/MS applications. The white PTFE facing contains no dyes and supports trace‑level analytical workflows requiring high signal integrity and stable baselines.

Ultra‑Low Bleed Pre‑Slit Septa

• White silicone rubber/white PTFE pre‑slit septa

• Ultra‑low bleed septa configuration

• Designed to minimize extractables

• Reduced background signal contribution

✅ Optimized for high‑sensitivity analytical workflows

Bonded Septa Construction

• Bonded septa design

• Helps reduce septa plunge

• Minimizes septa movement and dislodgement

• Supports repeated autosampler injections

✅ Reliable injection reproducibility

Pre‑Slit Septa Performance

• Easier needle penetration

• Reduced injection force

• Improved injection consistency

• Reliable resealing performance

✅ Supports smoother autosampler operation

Instrument Compatibility

• Suitable for systems comparable to:

  • Waters® Alliance

  • Waters® Acquity™

• Designed for autosamplers requiring pre‑slit septa

✅ Optimized for Waters‑style autosampler systems

Standard 9‑425 Compatibility

• Fits 9‑425 screw thread vials

• Compatible with:

  • 12 × 32 mm autosampler vials

  • Industry standard autosampler formats

✅ Broad autosampler compatibility

Dark Blue Knurled Caps

• Dark blue polypropylene construction

• Knurled exterior improves:

  • Grip

  • Installation

  • Removal

• Consistent sealing performance

✅ Convenient laboratory handling

High Purity Chromatography Applications

• Suitable for:

  • HPLC analysis

  • LC‑MS workflows

  • LC‑MS/MS applications

  • Trace‑level analytical testing

• Commonly selected as an alternative to certified caps

✅ Dependable high purity chromatography performance