Parathion-methyl, 100 µg/ml, Acetonitrile, 5ml

O,O-Diethylhydrogenphosphate

2,3,4,5-Tetrachlorophenol

1,2,3,4,6,7,8-Heptachloro[13C12]dibenzo-p-dioxin, 1.2ml x 50ug/ml, toluene