Caps, Screw Top, with Silicone Rubber / PTFE, ultra-pure, Pre-Slit Septa, fitted in "knurled", polypropylene, Light Blue Caps. For use with 9-425mm thread, 12x32mm autosampler vials. AQR Brand. 100/PK.
Additional Info:
The 9509S‑30C‑B Ultra‑Pure Pre‑Slit Screw Caps are engineered for maximum chemical inertness and lowest background interference in mass‑spectrometry‑based chromatography. These caps use non‑pigmented silicone rubber and PTFE septa, with no added dyes or fillers, delivering exceptional cleanliness.
The precision pre‑slit septa allow smooth, low‑force needle penetration while maintaining consistent resealing—ideal for LC‑MS, GC‑MS, and LC‑MS/MS workflows that demand reproducible injection performance.
Designed to fit 9‑425 thread, 12 × 32 mm autosampler vials, these light‑blue polypropylene caps are recommended for Waters® Alliance and Acquity™ systems, as well as any autosampler requiring pre‑slit septa. Performance is comparable to LC‑MS‑certified consumables used in high‑sensitivity MS environments.
For non‑pre‑slit ultra‑pure septa, see catalog 9509S‑10C‑B