EPA Method 601 Internal Standard Back Catalog number: 19094 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 98969 Carbazole as N Price on request 59028 Formic acid Price on request 0254.20-200-IO 2,2'-Binaphthyl, 200µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 612-78-2 Price on request