Atrazine, 100 µg/ml, Methanol, 1ml

Ethofumesate-2-keto, 100 µg/ml, Cyclohexane, 1ml

1.0M NaOH Standard Reagent

2,3,4,5-Tetrachloro-4'-methoxy[13C12]biphenyl, 1.2ml x 50ug/ml, toluene