EPA Method 353.2 Nitrate + Nitrite

Benzo[ghi]perylene-d12, 200µg/mL, Solvent-toluene, Unit 1mL, # of units-5, Cas.no. 93951-66-7

Tetrachlorvinphos, 10.0 µg/ml, Cyclohexane, 10ml

PCB-Mix 41, 10 ng/µl, 1ml