EPA Method 551Mix “A” Back Catalog number: 30094 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673202 Atrazine, 10.0 µg/ml, Acetonitrile, 10ml Price on request 70108 Diazinon, 1000µg/ml in MeOH, 1ml Price on request 680266 Trichlorfon, 10 µg/ml, Cyclohexane, 10ml Price on request