5-Hydroxyflunixin, 10mg

Sodium 1H,1H,2H,2H-perfluoro-1-[1,2-13C2]-octane sulfonate (6:2), 50µg/ml in MeOH, 1,2ml

Tetraoctyltin

Pentachlorophenol, 100 µg/ml, Acetonitrile, 1ml