Optimized simultaneous detection of multiple Oral anticoagulants in plasma using enhanced matrix removal-lipid solid-phase extraction and LC-MS/MS

This study proposes a method combining the Captiva enhanced matrix removal (EMR)-Lipid solid-phase extraction column with ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) for the qualitative and quantitative analysis of five common oral anticoagulants (OACs) (rivaroxaban, apixaban, edoxaban, dabigatran, and warfarin) in plasma samples. The method, through a simplified sample pretreatment, significantly enhances the recovery rate of OACs (ranging from 88% to 96%), demonstrating superior purification effects compared to traditional solid-phase extraction methods, and effectively removes matrix interference. The method exhibits good linearity over a concentration range of 0.010 to 5.0 × 10 2  ng·mL −1 (r 2  = 0.9514 to 0.9998), with high sensitivity, detection limits of 0.010 to 0.10 ng·mL −1 , and quantification limits of 0.10 to 1.0 ng·mL −1 . The recovery and precision analysis indicate that the method is highly accurate and stable, suitable for the analysis of large batches of plasma samples containing OACs. This method provides an efficient and reliable testing tool for clinical drug monitoring, contributing to the optimization and enhancement of safety in personalized anticoagulation therapy.