EPA Method 525 Surrogate Standard Back Catalog number: 93971 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2525.13-500MG Ibuprofen, neat, Solvent-neat, Unit 500mg, # of units-1, Cas.no. 15687-27-1 Price on request P-534N Diethylphosphate, 10mg Price on request 79069 EPA Method 8330 Analyte Price on request