Norfloxacin, 100 µg/ml, Methanol, 1ml

Perfluoro-n-[2,3,4-13C3]butanoic acid, 50µg/ml in MeOH, 1,2ml

Methyl isothiocyanate

1,2,4-Butanetriol, 1000µg/mL, Solvent-dry pyridine, Unit 10mL, # of units-1, Cas.no. 3068-00-6