EPA Method 551.1 Performance Check Soln Back Catalog number: 30104 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 0434.14-K-IO 3,3'-Dimethylbiphenyl, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 612-75-9 Price on request 676993 Sparfloxacin, 100mg Price on request 1955.11-2K-ME Ethyltri-n-propyltin Price on request