1. 40ml Ultra clean EPA VOA vial are suitable to all TOC instruments, including Sievers, Shimadzu, OI Analytical, and Teledyne-Tekmar. 2. Ultra low TOC. 10ppb. 3. Purge&Trap, GC-MS certified. 4. Teflon lined caps and protective dust covers. ultra clean 40ml VOA vials for soil Thomas Scientific. VOA Vials - Open Top Closures and Septum