D5-Norfloxacin, 100 µg/ml, Acetonitrile, 1ml

2-Hydroxyibuprofen, 10mg

n-Undecane, ?13C: -26.11, 150µg/mL, Solvent-cyclohexane, Unit 1mL, # of units-5, Cas.no. 1120-21-4

o-Cresol-d8, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-5, Cas.no. 203645-65-2