EPA Method 502.2 Surrogate Standard Back Catalog number: 91704 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended L-PFPES Sodium perfluoro-1-pentanesulfonate, 1.2ml x 50ug/ml, methanol Price on request 92863 n-Hydrocarbons - C5 to C30,C32,C34,C36,C38,C40 Price on request 97320 Diethyl ether Price on request