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Sustainable Strategies for High Sensitivity Analysis for Clinical Research LC-MS/MS Methods
Supported Liquid Extraction (SLE) for the cleanup of biological matrices has several advantages over Solid Phase Extraction (SPE). SLE requires fewer steps and less method development compared to SPE. For most samples that can be processed by liquid-liquid extraction, SLE can usually be used to provide cleaner and faster solvent partitioning. Historically, to get the cleanest SLE extracts, halogenated solvents like dichloromethane were used for elution of target analytes from the sorbent. A supported liquid extraction (SLE) approach that produced clean extracts with high recoveries and low matrix interferences using ethyl acetate, a more sustainable organic solvent, will be presented. Results for steroids, methylmalonic acid (MMA), and underivatized estrogens in human serum, in addition to optimized LC-MS/MS conditions and LC column considerations, are also discussed.
