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

1,2,3,4,6,7-Hexachloronaphthalene, 50µg/ml in nonane, 1,2ml

Quinoline Yellow (E 104), 1g

2,3,3',4,4',5'-Hexachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane