Perfluoro-n-butanoic acid, 50µg/ml in MeOH, 1,2ml

Mono-n-butyl phthalate-3,4,5,6-d4, 100µg/ml in MeOH, 1ml

MGK 264 (technical mixture), 100 µg/ml, Acetonitrile, 5ml

Cefazolin sodium salt, certified, 0.1g