Silicone\/PTFE (Polytetrafluoroethylene) septa, inozivikanwawo sesilicone\/PTFE liner kana caps, inowanzoshandiswa mumarabhoritari uye analytical chemistry yekuisa chisimbiso sampuli vials kana midziyo. Iyi septa inopa chisimbiso chakachengeteka uye chakavimbika kudzivirira sampuli evaporation kana kusvibiswa.Silicone\/PTFE septa inoshandiswa zvakanyanya mumashandisirwo akadai segasi chromatography (GC), liquid chromatography (LC), headspace analysis, uye sampuli yekuchengetedza. Iwo anowanikwa muhukuru hwakasiyana uye masisitimu kuti akwane chaiwo vial kana midziyo mhando, kuve nechokwadi chakachengeteka uye chakavimbika chisimbiso cheakasiyana ma laboratory maitiro.