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

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

1,4,5-Trichloro(13C10)naphthalene, 1.2mL x 50ug/mL, nonane

N-Ethyl-N-(2-hydroxyethyl)perfluorooctylsulfonamid