Abstract

ObjectivesThe aim of this study was to develop and validate a HPLC-MS/MS assay to determine total and unbound concentrations of temocillin in serum samples. Design and methodsMethanolic protein precipitation and ultrafiltration were used for total and unbound concentration extraction, respectively. Extract was injected into a LC-MS/MS system. Reversed phase chromatography was performed on a phenyl grafted column in gradient mode. Temocillin and internal standard (ticarcillin) were identified in positive electrospray ionization mode using ion transitions of m/z 415.34>339.1 and 385.31>160.3, respectively. ResultsTemocillin total and unbound concentration quantification assays were linear over concentrations ranging from 1 to 500mg/L and from 0.5 to 300mg/L, respectively. Both assays presented acceptable intra and inter-assay precision and accuracy <13.9%. Limits of quantification and detection were of 1 and 0.10mg/L, and 0.5 and 0.05mg/L for total and unbound concentration respectively. Total temocillin concentration recovery ranged from 85.80 to 99.40%. Temocillin ion suppression effect was <36.2 % in both assays. ConclusionThe method described is fast, sensitive and selective, with no interferences. This method may be used for both pharmacokinetic studies and therapeutic drug monitoring purposes.

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.