Aqueous Ethanol Standard (3,0g/l), 10 x 1,2ml

1,2,3,4,6,9-Hexachloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

Dithianon, 100 µg/ml, Acetonitrile, 5ml

1H,1H,2H,2H-Perfluorohexanesulfonic acid, 10mg