Trifluralin, 100 µg/ml, Ethyl acetate, 5ml

2,4,6,8-Tetrachloro[13C12]dibenzothiophene, 1.2ml x 50ug/ml, toluene

1,2-Dibromo-3-chloropropane

Terbuthylazine, 100 µg/ml, Acetonitrile, 5ml