EPA Method 507 Analyte Mix #8 Back Catalog number: 94131 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 52309 Ammonium Nitrate Modifier Price on request 30001R EPA Method 502.2/524.2 - Liquids Price on request C-157N 2,3,3',4,4',5'-Hexachlorobiphenyl, 5mg Price on request