An UPLC-MS detection method for the quantification of five antibiotics in human plasma

An UPLC-MS detection method for the quantification of amikacin, flucloxacillin, meropenem, penicillin G and vancomycin was developed and validated. The calibration curves were found to be linear from 0.47 to 50 mg/l for amikacin, 1.28 to 135 mg/l for flucloxacillin, 0.75 to 80 mg/l for meropenem, 0.38 to 80 mg/l for penicillin G and 0.73 to 80 mg/l for vancomycin. Between- and within-run accuracy was ranged between 85 and 115%. Between and within imprecision expressed as CV was within 15%. The validated method was successfully applied to a PK study in very preterm and small for gestational age infants treated for nosocomial sepsis and/or meningitis.