Caps, Screw Top, with Natural Silicone Rubber / White PTFE Pre-Slit Septa, bonded in "knurled", polypropylene, Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials. MICROSOLV Brand. 100/PK.
Additional Info:
Provide reliable sealing and reduced extractables with bonded septa screw caps designed for consistent autosampler performance.
9502S-31-CB caps feature a knurled polypropylene design that improves grip and handling during manual capping and removal. The bonded natural silicone rubber / PTFE septa ensures consistent positioning, helping prevent septa movement during injections and improving reproducibility in routine and high‑throughput workflows.
Natural silicone rubber is produced without added colorants, eliminating potential pigment-related extractables while maintaining the same sealing and flexibility characteristics as standard silicone. The pre‑slit PTFE layer allows easier needle penetration, reducing coring and improving injection consistency, while still providing chemical resistance and inertness for a wide range of applications.
Key Benefits
Natural silicone eliminates pigment-related extractables
Pre‑slit septa improves needle penetration and consistency
PTFE layer provides chemical resistance and inertness
Bonded septa prevents movement during injection
Knurled cap design enhances grip and usability
Compatible with standard 9‑425 (ND9) screw thread vials
Typical Applications
LC‑MS and LC‑MS/MS workflows
HPLC and UHPLC analysis
Trace analysis and sensitive sample testing
Pharmaceutical and analytical laboratories
Specifications
Cap Type: Screw Top
Thread Size: 9‑425 (ND9)
Cap Material: Polypropylene (knurled, blue)
Septa: Natural silicone rubber / white PTFE (bonded)
Septa Type: Pre‑slit
Compatibility: 12 × 32 mm autosampler vials
Pack Size: 100 caps
Compatibility
Designed for 9‑425 (ND9) screw thread autosampler vials
Compatible with standard 12 × 32 mm vial formats
Suitable for HPLC and LC‑MS workflows
Performance and Design Notes
Pre‑slit septa allows smoother needle entry
Natural silicone reduces risk of extractable pigments
Bonded septa ensures consistent sealing performance
Designed for reliable, repeatable autosampler operation
Important Notes
Ideal for applications requiring reduced extractables
Suitable for sensitive and routine analytical workflows
Provides a balance of performance, cleanliness, and usability