Ethanol standard in water,0.8g/L,water, 3mL

17ß(H),21 alpha(H)-Hopane, 100µg/mLin isooctane, 1ml

Propachlor, 1000µg/ml in MeOH, 1ml

2,4'-DDT, 100 µg/ml, Ethyl acetate, 5ml