Metolachlor, 100 µg/ml, Acetonitrile, 5ml

2,2',3,3',5,6'-Hexachlorobiphenyl,100 µg/mL,isooctane,1mL,

N-Nitroso-N-ethylaniline, 100μg/ml in MeOH, 5ml

Formaldehyde-2,4-DNPH, 1000µg/ml in Acetonitrile, 5ml