EPA Method 624 Internal / Surrogate Standard Back Catalog number: 92559 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 3517.14-100-CY Triadimefon Price on request 1344.12-25MG 2,6-Dimethylnaphthalene-d12,neat,neat,25mg, Price on request T767850 Tribenzothiophene, 10mg Price on request