EPA Method 642 - Analytes Back Catalog number: 40057 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 679173 13C2,15N2-Metronidazole, 10mg Price on request L-PFBS Potassium perfluoro-1-butanesulfonate, 1.2ml x 50ug/ml, methanol Price on request 8382.14-10-T 9-Nitrophenanthrene-d9, 10µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. Price on request