transparent TOC/VOC EPA vials Chrominex--glass sample vials. transparent 40ml VOA vials for lab use Chrominex-Voa Vial Oct 26, 2021 · Chrominex volatile organic analysis vials with screw cap-Voa Standard 40-mL glass screw-cap VOA vials with PTFE-lined silicone septa may be used for liquid matrices.