EPA Method 548.1 Internal Standard Back Catalog number: 30078 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 678256 15N3-Atrazine, 100 µg/ml, Acetonitrile, 1ml Price on request 50211 Anions Mix Price on request 675129 Brodifacoum, 100 µg/ml, Acetonitrile, 10ml Price on request