EPA Method 552.2 - Surrogate Standard Back Catalog number: 30108 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 9719.2-1G Oxalic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 144-62-7 Price on request 678667 D4-4-n-Nonylphenol, 100 µg/ml, Acetone, 10ml Price on request 9403.16-5MG Norfluoxetine-d5 (propyl-1,1,2,2,3-d5), neat, Solvent-neat, Unit 5mg, # of units-1, Cas.no. 1185132-92-6 Price on request