Sarafloxacin D8 hydrochloride trihydrate, certified, 10mg

2,2',4,4',5-Pentabromo[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane

2-Isopropylthioxantone, certified, 0.1g

15N3-Atrazine-desethyl, 100 µg/ml, Acetonitrile,