Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 71870 Bifenthrin, 1000µg/ml in Hexane, 1ml Price on request 3071.11-100-IO 5-Methyl-1-naphthol, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 51149-87-2 Price on request YA14470100AL Isoproturon D6 (dimethyl D6), 1000µg/mL in Acetonitrile, 1ml Price on request