Perfluoro-n-[1,2-13C2]dodecanoic acid, 1.2ml x 50ug/ml, methanol

Metrafenone, 10.0 µg/ml, Acetonitrile, 10ml

Heptachlor, 100 µg/ml, Ethyl acetate, 1ml

1,2,3,4,6,8-Hexachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene