Chlorthion, 100 µg/ml, Acetonitrile, 5ml

2,3,7,8-Tetrachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

Acrolein (0.25% w/v)

Aroclor 1260, 10µg/ml in Cyclohexane, 10ml