EPA Method 552.1 - Surrogate Standard Back Catalog number: 31056 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4035-0-10IO Diphenylsulfide in isooctane, Blank Units: 5x1mL ampoules Price on request 38155 RCRA Nitroaromatics in Soil Price on request 19267 EPA Method 502/524 Surrogate Standard #2 Price on request