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

2,4,4,5-Tetrachlorobiphenyl (BZ-74)

1,3,6,8-Tetrachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene

Chlordimeform, 10.0 µg/ml, Ethyl acetate, 10ml