EPA Method 552.1 - Surrogate Standard Back Catalog number: 31057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 11513.13-100MG 7-?Chloro-?1-?cyclopropyl-?6-?fluoro-?1,?4-?dihydro-?4-?oxo-?quinoline-?3-?carboxylic acid,neat,neat,100mg, Price on request 677803 Oxalic acid, 250mg Price on request DPE-3 4-Chlorodiphenyl ether, 1.2ml x 50ug/ml, nonane Price on request