EPA Method 353.2 Nitrate & Nitrite Back Catalog number: 52120 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 31057 EPA Method 552.1 - Surrogate Standard Price on request 3865.45-100-ME Solanine,100 µg/mL,MeOH,1mL, Price on request 70462 1,3-Dimethyl-2-nitrobenzene Price on request