Flumequine, 100 µg/ml, Methanol, 1ml

17 alpha(H),21ß(H)-Hopane, 100µg/mL in Isooctane, 1ml

1,2,3,4,7,8-Hexachlorodibenzo-p-dioxin, 1.2ml x 50ug/ml, nonane

m-Xylene