Thomson Autosampler Vial Cap 9 mm with PTFE Septa PP 100 Caps

The Thomson 64691B Autosampler Vial Cap is a specialized closure designed for sealing 9 mm autosampler vials, providing a secure and reliable seal for a wide range of laboratory applications. The cap is made from polypropylene (PP), a durable and chemically resistant plastic. It features a PTFE (polytetrafluoroethylene) septa, which is a crucial component that provides a self-sealing barrier. The PTFE layer is chemically inert and protects the sample or solvent from interacting with the polypropylene cap, while the septa itself is designed to be pierced by an autosampler needle.

This design is essential for gas and liquid chromatography (GC/HPLC), as it minimizes the risk of contamination and evaporation and ensures a leak-proof closure.