EPA Method 552,552.1,552.2 Internal Std Back Catalog number: 30105 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 79012 Pentachloronitrobenzene Price on request 675831 Flucythrinate, 100 µg/ml, Toluene, 5ml Price on request 50594 Copper - 20 PPM Price on request