EPA Method 539Mix #1, 100µg/ml in MeOH, 1ml Back Catalog number: 96884 Manufacturer: ABSOLUTE STANDARDS Availability: 3 weeks Price on request - + Recommended 2042.8-50-ME n-Perfluorooctanoic acid, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 335-67-1 Price on request 1899.17-25MG Norcodeine hydrochloride, neat, Solvent-neat, Unit 25mg, # of units-1, Cas.no. 14648-14-7 Price on request (3837.3) Glycerol: See product 3644.3 Price on request