Abstract
Background: Chromatographic methods for determination of insulin degludec in rabbit plasma by Ultra Performance Liquid Chromatography-Tandem Mass Spectrometry were developed.
Methods: Analytes were eluted from Waters ACQUITY UPLC® Peptide BEH C18 (2.1×50mm, 300Å) column with a mobile phase of water containing 0.1% formic acid (A) and acetonitrile containing 0.1% formic acid (B). Quantitation of insulin degludec was performed using 1222.06 > 641.24 m/z on Multiple- Reaction Monitoring (MRM) mode.
Results: Good linearity was observed in the concentration range of 500-50000 ng/mL (r >0.99), and the lower limit of quantification was 500ng/mL. The within-run and between-run precision (expressed as relative standard deviation, RSD) of insulin degludec were ≤ 14.16% and ≤ 13.64% respectively, and the accuracy was within 94.37-96.35%. The recovery and matrix effects were both within acceptable limits.
Conclusions: This method was successfully applied for the pharmacokinetic study of insulin degludec in rabbit after subcutaneous administration.
Keywords: Insulin degludec, insulin glargine, UPLC-MS/MS, diabetes, method validation, rabbit plasma.
Graphical Abstract
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