Isofetamid, 100 µg/ml, Acetonitrile, 1ml

Mass-Labelled PCB Syringe Spike Solution, 1.2ml, nonane

1,1,2,2-Tetrachloroethane, 2000µg/ml in MeOH, 1ml

D10-Carbophenothion, 100 µg/ml, Acetone, 1ml