EPA Method 353.2 Nitrate + Nitrite Back Catalog number: 53120 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 1647.7-25ML Pentafluorobenzoyl chloride, neat, Solvent-neat, Unit 25mL, # of units-1, Cas.no. 2251-50-5 Price on request 8625.15-10-IO 4-n-Nonylphenol (ring13C6), 10µg/ml, Solvent-Isooctane, Unit 1mL, # of units-1, Cas.no. Price on request 71426 3,4,5,6-Tetrahydro-2-pyrimidinethiol Price on request