2,2',3,5-Tetrachlorobiphenyl,100 µg/mL,isooctane,1mL,

Ethanol standard in serum,1.3g/L,serum, 3mL

Benz[a]anthracene-d12, 1000µg/mL, Solvent-toluene, Unit 1mL, # of units-1, Cas.no. 1718-53-2

Atrazine, 100 µg/ml, Ethyl acetate, 5ml