Amazon volatile organic analysis vials agent-Voa Vial Amazon volatile organic analysis vials agent I-Chem S126-0020 Borosilicate Glass 20mL 100 - amazon.com I-Chem certified 200 and 300 series vials are guaranteed to meet the EPA's performance based specifications for volatile organic analysis. 40mL and 60mL vials are also TOC certified . 600ppb.