Applying UHPLC–HRMS/MS to Differentiate Plant- and Drug-Derived Salicylic Acid Residues in Eggs

Using ultrahigh-performance liquid chromatography high resolution tandem mass spectrometry (UHPLC–HRMS/MS), researchers at Wageningen Food Safety Research, part of Wageningen University & Research (The Netherlands) identified methyl 2-(sulfo-oxy)benzoate as a novel biomarker that differentiates pharmaceutical from plant-derived salicylic acid in eggs. LCGC International spoke to Serena Rizzo, corresponding author of the paper resulting from this work, about the group’s findings.