EPA Method 8040 - Surrogate Standard Mix Back Catalog number: 80413 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 72031 Theophylline Price on request 3152.5-K-IO Methyl tetranoate (Methyl butyrate), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 623-42-7 Price on request 680066 Cinosulfuron, 100mg Price on request