EPA Method 551 - Disinfection By-Products Back Catalog number: 32852 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 98292 n-Hydrocarbons (Variable C6-C44) Price on request 2192.8-50-ME Perfluoro-4-ethylcyclohexane sulfonic acid, potassium salt, 50µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 335-24-0 Price on request 681206 Lumichrome, 100mg Price on request