Signal interference between drugs and metabolites in LC-ESI-MS quantitative analysis and its evaluation strategy.
J Pharm Anal
; 14(7): 100954, 2024 Jul.
Article
en En
| MEDLINE
| ID: mdl-39175610
ABSTRACT
Liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI-MS) is a widely utilized technique for in vivo pharmaceutical analysis. Ionization interference within electrospray ion source, occurring between drugs and metabolites, can lead to signal variations, potentially compromising quantitative accuracy. Currently, method validation often overlooks this type of signal interference, which may result in systematic errors in quantitative results without matrix-matched calibration. In this study, we conducted an investigation using ten different groups of drugs and their corresponding metabolites across three LC-ESI-MS systems to assess the prevalence of signal interference. Such interferences can potentially cause or enhance nonlinearity in the calibration curves of drugs and metabolites, thereby altering the relationship between analyte response and concentration for quantification. Finally, we established an evaluation scheme through a step-by-step dilution assay and employed three resolution methods:
chromatographic separation, dilution, and stable labeled isotope internal standards correction. The above strategies were integrated into the method establishment process to improve quantitative accuracy.
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Banco de datos:
MEDLINE
Idioma:
En
Revista:
J Pharm Anal
Año:
2024
Tipo del documento:
Article
País de afiliación:
China