Bupropion HCl, 1000μg/ml in MeOH, 1ml

2,2',3,4',5,5',6-Heptachloro-4-methoxy[13C12]biphenyl, 1.2ml x 50ug/ml, toluene

Fenpropimorph, 100 µg/ml, Acetonitrile, 5ml

Hexavalent Chromium (Cr 6+)