Sulfaphenazole, 100 µg/ml, Methanol, 5ml

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

2,2',3,3',4,5,5',6-Octachlorobiphenyl (198)

Ethyl caproate