Method 200.8/1638/1640 Internal Standard Back Catalog number: 53145 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1328.14-10-T 2-Fluorophenanthrene, 10µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 523-41-1 Price on request 38401 WP Formaldehyde Price on request 673638 Methidathion, 100 µg/ml, Ethyl acetate, 5ml Price on request