EPA Method 8121 Surrogate Standard Back Catalog number: 81204 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-F Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request 11769.12-100-IO 2,3,3',4',5,5',6-Heptachlorobiphenyl ,100 µg/mL,isooctane,1mL, Price on request 22015 CLP Semi-Volatile Acid Surrogate Standard Price on request