EPA Method 353.2 Nitrate + Nitrite

2,4-Dimethylhexane, 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 589-43-5

Fenobucarb, 100 µg/ml, Acetonitrile, 1ml

Sodium 1H,1H,2H,2H-perfluorodecylphosphate, 50µg/ml in MeOH, 1,2ml