EPA Method 507 Analyte Mix #1 Back Catalog number: 30182 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 56229 Copper (Cu) Price on request 10454.21-100MG 2,2-Bis[3,5-dibromo-4-(2,3-dibromopropoxy)phenyl]propane, Techn. 95%,neat,neat,100mg, Price on request 57174 Tungsten (W) Price on request