2021/10/26 · sample storage vials VOA vials for soil Chrominex-COD Vials Oct 26, 202 · Standard 40-mL glass screw-cap VOA vials with PTFE-lined silicone septa may be used for liquid matrices. Special 40-mL VOA vials for purge-and-trap of solid samples are described in Method 5035. VOA vials for headspace analysis of solid samples are described in Method 502.