Electrochemical Mass Spectrometry in Metabolite Characterization
Summary
Electrochemical mass spectrometry (EC-MS) integrates controlled redox reactions with high-resolution mass analysis to generate and identify metabolites in real time. By applying a precise potential to an electrode, EC-MS mimics enzymatic phase I and phase II transformations, producing oxidative or reductive metabolites and conjugates without the need for living systems. This approach captures transient intermediates, uncovers mechanistic pathways, and provides rapid, matrix-free metabolite profiling. Hyphenated setups such as EC/LC/ESI-MS extend analytical selectivity by introducing chromatographic separation upstream of ionisation, while microfluidic and flow-through cells enhance throughput and reproducibility. EC-MS has proven invaluable in drug metabolism, environmental contaminant fate studies and the synthesis of isotopically labelled standards, offering a green and cost-effective complement to conventional in vitro and in vivo assays.
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Electrochemical Mass Spectrometry in Metabolite Characterization publication trend
The graph below shows the total number of articles in electrochemical mass spectrometry in metabolite characterization across all publications each year (not limited to Nature Index journals).
Technical terms
Electrochemical mass spectrometry: Coupling of electrochemical reaction and mass spectrometric detection to identify reaction products and intermediates in real time.
Electrospray ionisation (ESI): Soft ionisation technique generating ions from solution-phase analytes under high voltage for mass spectrometry.
Microfluidic device: Miniaturised fluidic platform integrating electrodes for controlled electrochemical reactions in a confined environment.
Phase I metabolism: Initial oxidative or reductive biotransformation of xenobiotics to introduce polar functional groups.
Phase II metabolism: Conjugative biotransformations that couple xenobiotic metabolites with endogenous molecules such as glutathione or glucoside.
Isotopically labelled metabolite standards: Chemically identical compounds incorporating stable isotopes for accurate quantitative mass spectrometric analysis.
References
- Mass spectrometric snapshots for electrochemical reactions. Chemical Science (2016).
- Recent Developments in Electrochemistry–Mass Spectrometry. ChemElectroChem (2020).
- A Disposable Microfluidic Device with a Screen Printed Electrode for Mimicking Phase II Metabolism. Sensors (2016).
- Glucosylation and Glutathione Conjugation of Chlorpyrifos and Fluopyram Metabolites Using Electrochemistry/Mass Spectrometry. Molecules (2019).
- Development of an electrochemical flow‐through cell for the fast and easy generation of isotopically labeled metabolite standards. Drug Testing and Analysis (2021).
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