Catalog Number - 9509S-10B

The 9509S‑10B AQ™ Screw Caps are selected for chromatography workflows requiring high purity septa materials, low background interference, and consistent injection performance. The bonded white silicone rubber/white PTFE 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 septa, these caps are designed to minimize extractables and background signal in sensitive HPLC applications. White PTFE provides excellent chemical inertness without added dyes, supporting trace‑level analytical workflows and stable chromatographic baselines.

Ultra‑Low Bleed Septa

• White silicone rubber/white PTFE septa

• Ultra‑low bleed septa configuration

• Designed to minimize extractables

• Reduced background signal contribution

✅ Optimized for high purity HPLC workflows

Bonded Septa Construction

• Bonded septa design

• Helps reduce septa plunge

• Minimizes septa movement and dislodgement

• Supports repeated autosampler injections

✅ Reliable injection reproducibility

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

  • Trace‑level analytical workflows

  • Regulated laboratory environments

  • Routine analytical testing

• Commonly selected as an alternative to certified caps

✅ Dependable high purity chromatography performance

Chemical Inertness Benefits

• White PTFE without added dyes

• Excellent chemical inertness

• Supports stable chromatographic baselines

• Suitable for sensitive analytical methods

✅ Reduced risk of analytical interference