Propham, 10 µg/ml, Ethyl acetate, 10ml

(2-Nitrophenyl)phosphoric Triamide, 1g

PAH Standard (10 ppm), 10µg/ml in Acetonitrile, 1ml

4-n-Octylphenol-di-ethoxylate, 10.0 µg/ml, Aceton