EPA Method 508 Surrogate Standard Back Catalog number: 19042 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended S-4770-ASS-10T Custom mix of thiophenes,two components in toluene: 0938.8 Benzothiophene 0.2mg/mL 0884.12 Dibenzothiophene 0.4mg/mL Price on request 58092 Uranium (U) Price on request I510960 Indeno[1,2,3-cd]pyrene, 100mg Price on request