EPA Method 353.2 Nitrate & Nitrite Back Catalog number: 52120 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 50593 Copper (Cu) - 10 PPM Price on request 677166 Tetra-n-butyltin, 250mg Price on request 9957.28-10MG Di-iso-decyl phthalate (C10-alkyl ester isomer mix), neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 26761-40-0 Price on request