Caps, Screw Top, with PTFE Septa, fitted in "knurled", polypropylene, Translucent Caps. For use with 9-425mm thread, 12x32mm autosampler vials. MICROSOLV Brand. 100/PK.
Additional Info:
Rubber‑free septa are preferred in methods where extractables, adsorption, or incompatibility with elastomeric materials may impact analytical results.
The 9502S‑50C‑N screw caps feature PTFE‑only septa with no silicone support, making them suitable for analyses that require an inert, non‑reactive sealing surface. Because PTFE does not have elastic recovery, these caps are best used for single injections or with non‑volatile samples where resealing is not required.
The translucent polypropylene cap includes a knurled exterior for secure handling and consistent torque. Designed for standard 9‑425 thread, 12 × 32 mm autosampler vials, these caps provide reliable fit and compatibility across common autosampler platforms.
Key Features & Benefits
PTFE‑only septa (rubber‑free) ✅ Eliminates silicone and elastomer interference
Chemically inert surface ✅ Reduces interaction with sensitive samples
No resealing capability ✅ Ideal for single injections
Fits 12 × 32 mm autosampler vials ✅ Standard 9‑425 compatibility
Knurled polypropylene cap ✅ Secure grip and handling
Typical Applications
LC‑MS and HPLC analysis
Methods sensitive to rubber extractables
Non‑volatile sample testing
Pharmaceutical and analytical laboratories
Important Notes
For 9‑425, 12 × 32 mm autosampler vials only
PTFE septa do not reseal after puncture
Recommended for single injection use
Not ideal for volatile samples