Atrazine-d5 (ethyl-d5),1000 µg/mL,acetonitrile,1mL,

17?(H),21ß(H)-(22S)-Homohopane, 500µg/mL in Isooctane, 1mL

PAH 16Mixture, 100µg/ml in MeOH, 1ml

Mixture of native α-, β-, and γ-HBCD, 1.2ml , toluene