Ethion, 100 µg/ml, Toluene, 1ml

Acetone-2-13C,2000 µg/mL,MeOH,1mL,

Benzyl-n-butyl phthalate-d4, 100µg/ml in IO, 1ml

Metolachlor, 100 µg/ml, Methanol, 1ml