RESTEK 21796 Volatile Organic Analyte Sampling Vial, Open Top RESTEK 21796 Volatile Organic Analyte Sampling Vial, Open Top with 0.125″ PTFE/Silicone Septa, Glass, 40 mL, Clear, Clear (Pack of 72): Amazon.com: Industrial & Scientific 467ORGANIC VOLATILE IMPURITIES, chemical structure, molecular Test Solution— Transfer 100mg,accurately weighed,of the material under test to a vial,add 5