EPA Method 502.2 Surrogate Standard Back Catalog number: 91704 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended L113507 L-(+)-Lactic Acid-13C3 Sodium Salt, 5mg Price on request 1274.9-K-CY 1,2,3-Trimethylbenzene, 1000µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-1, Cas.no. 526-73-8 Price on request 59899 Nitrite (NO2-) as N Price on request