for qualitative measurements1,2-Propanediol. 2 mL Diethylene glycol ethyl ether.2 mL1,3-Propanediol. 2 mL Diethylene glycol butyl ether.2 mL1,3-Butanediol . 2 mL 2-Methoxyethanol . 2 mL2,3-Butanediol . 2 mL Ethylene glycol monoethyl ether . 2 mL1,4-Butane