Method 1640Mix A Back Catalog number: 52146 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-I40 Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request 675399 Fenoprop, 100 µg/ml, Acetonitrile, 5ml Price on request 673352 Methidathion, 10.0 µg/ml, Acetonitrile, 10ml Price on request