EPA Method 507 - Performance Check Solution Back Catalog number: 19130 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1100.12-K-IO Dibenzofuran, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 132-64-91 Price on request 68C-CS Labelled Cleanup Stock Solution, 1.2ml, nonane Price on request 1384.13-200-T 3-Methylcarbazole, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 4630-20-0 Price on request