EPA Method 548.1 Analyte Back Catalog number: 30277 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 10020.12-100-IO 2,2',5,5'-Tetrachlorobiphenyl-3,4,6-d3 Price on request 57219 Potassium (K) Price on request 92388 Semi-Volatile Standard Price on request