EPA Method 552 Internal Standard Back Catalog number: 30055 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 58130 Zinc (Zn) Price on request 1160.40-10MG n-Tetracontane, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 4181-95-7 Price on request 95017 PCB Mix 50 ppb Price on request