Ethidimuron, 10 µg/ml, Acetonitrile, 10ml

N-Nitroso-4-(2-hydroxyethyl)-piperazin-2-one,neat,neat,100mg,

Pentadecafluorooctanoic acid, 100 µg/ml, Methanol

2,2',3,4',5',6-Hexachlorobiphenyl (149)