(-)-(S)-Levetiracetam,1000 µg/mL,MeOH,1mL

D12-Benzo[a]pyrene, 100 µg/ml, Acetonitrile, 1ml

Arochlor 1242 , 10µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 53469-21-9

4-Nitrobiphenyl