EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 52069 Spiking Standard 1 Price on request 2604.18-10UG 1,2,3,4-Tetrahydrochrysene, neat, Solvent-neat, Unit ca. 10µg , # of units-1, Cas.no. 2091-90-9 Price on request 9720.12-100MG 1,12-Dodecanedioic acid, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 693-23-2 Price on request