EPA Method 551.1 Internal Standard Back Catalog number: 32103 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679115 Triticonazole, 10 µg/ml, Cyclohexane, 10ml Price on request 97368 1,4-Dioxane-d8 Price on request 681223 Formothion, 10.0 µg/ml, Ethyl acetate, 10ml Price on request