EPA Method 8021B Internal Standard Back Catalog number: 19394 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 674491 PSA-C18-Mix 1 Price on request 1268.8-K-ME Ethylbenzene, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 100-41-4 Price on request 83594 Pentachlorophenol Price on request