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 93988 PAH Standard, 1000µg/ml in methylene chloride, 1ml Price on request R700852-1MG Roxithromycin-d7, 1mg Price on request 71968 Methylphosphonic acid Price on request