Screw caps from MicroSolv are designed for per- and polyfluoroalkyl substances (PFAS) testing and are used with 9 m screw-top autosampler vials. According to the company, the caps include a silicone rubber/polypropylene septa or liner and will reseal after initial injections but do not contain any polytetrafluoroethylene.
MicroSolv Technology
Leland, NC