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Related Concept Videos

Electrospray Ionization (ESI) Mass Spectrometry01:12

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Higher molecular weight biomolecules are nonvolatile compounds that may decompose before ionizing or vaporizing during mass analysis with conventional electron impact ionization methods. Accordingly, electrospray ionization (ESI) is the favored method for vaporizing and ionizing biomolecules as it circumvents rapid fragmentation and enables the recording of mass signals for the entire biomolecule.
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This lesson details the instrumentation of a mass spectrometer—a physical instrument to perform mass spectrometry on analyte molecules and record the characteristic mass spectra. This is achieved via three chief functions:
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Related Experiment Video

Updated: Aug 3, 2025

Large Scale Non-targeted Metabolomic Profiling of Serum by Ultra Performance Liquid Chromatography-Mass Spectrometry UPLC-MS
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Label-free high-throughput screening via acoustic ejection mass spectrometry put into practice.

Martin Winter1, Roman P Simon1, Tim T Häbe1

  • 1Drug Discovery Sciences, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach an der Riß, Germany.

SLAS Discovery : Advancing Life Sciences R & D
|April 9, 2023
PubMed
Summary

Acoustic droplet ejection-open port interface-mass spectrometry (ADE-OPI-MS) successfully identified enzyme inhibitors in over a million compounds. This study demonstrates ADE-OPI-MS

Keywords:
ADE-OPI-MSAcoustic ejection mass spectrometryDrug discoveryHigh-throughput screeningLabel-free screening

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Area of Science:

  • Analytical Chemistry
  • Biochemistry
  • Drug Discovery

Background:

  • Acoustic droplet ejection-open port interface-mass spectrometry (ADE-OPI-MS) is a novel label-free analytical technique suitable for high-throughput screening (HTS).
  • The adoption of ADE-OPI-MS is hindered by a lack of data on its robustness for HTS campaigns involving millions of samples in complex matrices.
  • This study addresses the need for demonstrating ADE-OPI-MS applicability in large-scale drug discovery efforts.

Purpose of the Study:

  • To present the first fully automated HTS campaign using ADE-OPI-MS technology.
  • To identify inhibitors of a metabolic enzyme from a library exceeding one million compounds.
  • To showcase the assay development, validation, and adaptation for HTS requirements.

Main Methods:

  • Development and validation of an assay for HTS using ADE-OPI-MS.
  • Adaptation of the ADE-OPI-MS technique for a >1 million compound library screening.
  • Refinement of capillary cleaning protocols to ensure robustness during automated HTS.

Main Results:

  • Successful execution of a fully automated HTS campaign utilizing ADE-OPI-MS.
  • Identification of metabolic enzyme inhibitors from a large compound library.
  • Demonstration of the critical role of capillary cleaning in achieving HTS success.

Conclusions:

  • The study unequivocally demonstrates the applicability of ADE-OPI-MS for HTS-based drug discovery.
  • ADE-OPI-MS is a viable and robust technology for screening large compound libraries.
  • The findings pave the way for broader adoption of ADE-OPI-MS in pharmaceutical research.