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Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
Published on: August 30, 2018
Simple and robust LC-MS/MS analysis method for therapeutic drug monitoring of micafungin
Jasper M Boonstra1,2, Erwin M Jongedijk1, Remco A Koster1,3
1Universityof Groningen, University Medical Center Groningen, Department of ClinicalPharmacy and Pharmacology, Groningen, The Netherlands.
Aim:
To develop a simple and robust LC-MS/MS method to quantify concentrations of micafungin in human plasma for pharmacokinetic studies and therapeutic drug monitoring.
Methods:
Sample preparation involved protein precipitation with acetonitrile:methanol (83:17% v/v) and [13C6]-micafungin as internal standard. A rapid and selective method for micafungin was validated across a range of 0.200-10.0 mg/l.
Results:
The calculated accuracy for the eight-point calibration ranged from 0.7 to 5.3%. Within-run precision ranged from 0.8 to 5.9%, between-run precision ranged from 0.7 to 3.1%, and overall precision ranged from 1.3 to 6.6%.
Conclusion:
A simple and robust LC-MS/MS method for analyzing micafungin in human plasma has been validated and was utilized for quantification of micafungin.
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