Dimethachlor OA, 100 µg/ml, Acetonitrile, 1ml

U-{13C6}-Kojic Acid

Sodium 1H,1H,2H,2H-perfluoro-1-[1,2-13C2]-hexane sulfonate (4:2), 50µg/ml in MeOH, 1,2ml

Sodium chlorate, 250mg