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Related Concept Videos

Matrix-Assisted Laser Desorption Ionization (MALDI)01:08

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Matrix-assisted laser desorption ionization (MALDI) is a powerful analytical technique used in mass spectrometry. It enables the identification and characterization of various biomolecules, including proteins, peptides, nucleic acids, and carbohydrates. MALDI is an ionization technique, widely employed in biological and medical research, as well as in fields like pharmacology and biochemistry.The analyte of interest, a biomolecule or a mixture of biomolecules, is mixed with a suitable matrix...
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Mass spectrometry is a powerful characterization technique that can identify and separate a wide variety of compounds ranging from chemical to biological entities, based on their mass-to-charge ratio (m/z). The instruments that allow this detection, known as mass spectrometers, have three components: an ion source, a mass analyzer, and a detector. These spectrometers differ based on the nature of their ion source and analyzers.Matrix-assisted laser desorption ionization (MALDI) is a commonly...
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Updated: Dec 30, 2025

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer
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Rapid and Sensitive Drug Quantification in Tissue Sections Using Matrix Assisted Laser Desorption Ionization-Ion

Margaux Fresnais1,2, Alexander Muck3, Marius Majewsky1

  • 1Department of Clinical Pharmacology and Pharmacoepidemiology, Heidelberg University Hospital, Im Neuenheimer Feld 410, 69120 Heidelberg, Germany.

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Ion mobility spectrometry (IMS) enables rapid drug quantification in tissue sections. This technique effectively separates drugs from biological backgrounds, proving crucial for pharmacological MALDI imaging analysis.

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Area of Science:

  • Analytical Chemistry
  • Pharmacology
  • Biophysics

Background:

  • Ion mobility spectrometry (IMS) offers rapid mass spectrometric separation for complex samples.
  • IMS excels at separating isobaric compounds where traditional methods fail, such as in MALDI imaging.
  • Pharmacological analysis of drugs in tissue sections presents significant analytical challenges.

Purpose of the Study:

  • To demonstrate the utility of IMS for on-surface drug quantification in tissue sections using MALDI.
  • To validate IMS as a method for discriminating drugs from complex biological matrices.
  • To establish a proof-of-concept for IMS in pharmacological tissue analysis.

Main Methods:

  • Utilized Ion Mobility Spectrometry (IMS) coupled with MALDI.
  • Employed a profiling approach for sample preparation.
  • Quantified the anthelmintic drug mebendazole (MBZ) as a model compound.

Main Results:

  • Successfully discriminated mebendazole (MBZ) from the biological background in tissue sections.
  • Achieved quantification of MBZ in the range of 5 to 5,000 ng/g.
  • Established a limit of detection of 1 ng/g of tissue within 2 hours.

Conclusions:

  • IMS is a valuable separation technique for on-surface drug quantification in tissue sections.
  • IMS enhances the analysis of low-concentration drugs in complex biological samples.
  • This study validates IMS for pharmacological MALDI imaging applications.