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Updated: Jul 31, 2026

High-throughput and Comprehensive Drug Surveillance Using Multisegment Injection-Capillary Electrophoresis-Mass Spectrometry
Published on: April 23, 2019
Increase of the LC-MS/MS sensitivity and detection limits using on-line sample preparation with large volume plasma
Ming Li1, Yazen Alnouti, Rachael Leverence
1Pharmacokinetics, Dynamics and Metabolism, Pfizer Global Research and Development, Eastern Point RD MS 4022, Groton, CT 06340, USA. Li.Ming@pfizer.com
Abstract:
Large volume injection (LVI) has systematically been studied to improve LC-MS/MS sensitivity (signal-to-noise ratio, or S/N) and detection limits. The method of LVI was combined with on-line solid phase extraction (on-line SPE) and LC-MS/MS detection for analysis of compounds directly in plasma. It was demonstrated that LVI of plasma with on-line SPE-LC-MS/MS allows for improvement of sensitivity and detection limits without compromising chromatographic peak shape and resolution and inducing significant matrix and signal suppression effects. Furthermore, sensitivity and detection limits improve linearly with the injection volume up to 100 microL. Quantification of the model compounds in plasma demonstrated comparable calibration curve statistics, precision and accuracy for 5, 50 and 100 microL plasma injections.
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