EPA Method 551.1 Surrogate Standard Back Catalog number: 31102 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 8807.24-10MG Naphtho[1,2-k]fluoranthene, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 238-04-0 Price on request 95807 L(+)Lactic acid Price on request 9113.10-100-IO Hydroxycitronellal, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 107-75-5 Price on request