WHO PCB Extraction Standard, 100pg/µl in nonane, 1,2ml

4-Ethylphenol, 100 µg/ml, Methanol, 1ml

Benzo[e]pyrene-d12, 100µg/mL, Solvent-toluene, Unit 1mL, # of units-10, Cas.no. 205440-82-0

Copper (Cu), 1000µg/ml in 2%-HNO3/Water, 100ml