EPA Method 8240A - Purgeable Surrogate Std Back Catalog number: 24002 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended M325664 Methyl Paraben-13C6, 1mg Price on request 2517.8-100-ME Caffeine,100 µg/mL,MeOH,1mL, Price on request 1125.20-K-IO 1,3-Diphenylbenzo[c]thiophene, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 16587-39-6 Price on request