Metronidazole, 100 µg/ml, Acetonitrile, 1ml

N-Nitrosodiethylamine, 1000μg/ml in MeOH, 1ml

1,2-Dichloroethane, 1000 ng/µl, 1ml

2-Chlorobenzo trichloride,1000 µg/mL,isooctane,1mL,