EPA Method 531.1 - Analytes Back Catalog number: 30042R Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50401 Nitrate as (NO3-) Price on request 72125 Cephalexin Price on request 9556.6-K-IP 2,4,6-Trinitrophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 88-89-1 Price on request