EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 55212 Lanthanum (La) Price on request PFDOA Perfluoro-n-dodecanoic acid, 1.2ml x 50ug/ml, methanol Price on request 91356 Glycol Standard Price on request