Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 73568 Fenchlorphos oxon Price on request 677898 Aldrin, 100 µg/ml, Acetonitrile, 1ml Price on request 676784 Diquat dibromide monohydrate, 100 µg/ml, Water, Price on request