EPA Method 624 Surrogate Standard Back Catalog number: 19112 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0420.17-150-CY n-Heptadecane, ?13C: - 25.72, 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 629-78-7 Price on request 679330 Ethyl benzoylformate, 250mg Price on request 71494 Methyl quinoxaline-2-carboxylate Price on request