13C4-Fipronil, 100 µg/ml, Acetonitrile, 1ml

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

Butachlor OA, 100 µg/ml, Acetonitrile, 1ml

Tetrachloroethene