EPA Method 507 - Performance Check Solution Back Catalog number: 19137 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended MBP-111 2,3,3',5,5'-Pentachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane Price on request 71584 2,4,6-Trichlorophenol-PFB derivative Price on request UFA-001S Methyl cis-9-hexadecenoate (C16:1), 10mg/ml in Heptane, 1ml Price on request