EPA Method 353.2 Nitrate + Nitrite

1,2,6-Trimethylphenanthrene, 500µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 30436-55-6

Trimethoprim

EPA Method 537 Surrogate Primary Dilution Standard (SUR PDS), 1.2ml, methanol