2,6-Dibromodiphenyl ether,50 µg/mL,isooctane,1mL,

(-)-Nicotine, 100 µg/ml, Methanol, 1ml

(13C9)Endosulfan Sulfate, 100µg/ml in Nonane, 1,2ml

N-Nitrosodimethylamine-d6, 10mg