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Related Concept Videos

MALDI-TOF Mass Spectrometry01:19

MALDI-TOF Mass Spectrometry

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...
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...
Peptide Identification Using Tandem Mass Spectrometry01:33

Peptide Identification Using Tandem Mass Spectrometry

Tandem mass spectrometry, also known as MS/MS or MS2, is an analytical technique that employs two mass analyzers. Essentially it is a series of mass spectrometers that helps isolate a particular biomolecule and then helps study its chemical properties.
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Tandem Mass Spectrometry01:21

Tandem Mass Spectrometry

Tandem mass spectrometry is a technique that uses multiple mass analyzers in series to obtain a higher selectivity and reduce chemical noise during analyte detection. Instruments with multiple analyzers separated by an interaction cell enable secondary fragmentation and selected study of the fragment ions.Secondary fragmentations occur in the interaction cell and can be induced by various factors. Fragmentation induced by collision with inert gases, such as N2, Ar, He, etc., is called...

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Related Experiment Video

Updated: May 25, 2026

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer
09:38

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Published on: November 26, 2013

Automated MALDI matrix coating system for multiple tissue samples for imaging mass spectrometry.

William P Mounfield1, Timothy J Garrett

  • 1Department Chemical Engineering, University of Florida, Gainesville, FL 32610, USA.

Journal of the American Society for Mass Spectrometry
|January 12, 2012
PubMed
Summary

A new automated spray chamber method ensures uniform matrix deposition for matrix-assisted laser desorption/ionization (MALDI) mass spectrometry. This technique improves analyte ion signal reproducibility and data quality compared to existing methods.

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Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization (IR-MALDESI)

Published on: March 24, 2016

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Last Updated: May 25, 2026

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer
09:38

Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer

Published on: November 26, 2013

Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization (IR-MALDESI)
10:47

Whole-body Mass Spectrometry Imaging by Infrared Matrix-assisted Laser Desorption Electrospray Ionization (IR-MALDESI)

Published on: March 24, 2016

Area of Science:

  • Analytical Chemistry
  • Biotechnology
  • Mass Spectrometry

Background:

  • Reproducible analyte ion signals in matrix-assisted laser desorption/ionization (MALDI) mass spectrometry depend on uniform matrix deposition.
  • Conventional matrix deposition methods often yield non-homogenous crystal formation, impacting signal quality and requiring significant manual effort.
  • Existing techniques struggle to achieve consistent and high-quality matrix application on tissue samples.

Purpose of the Study:

  • To develop and validate a fully-automated method for uniform matrix deposition on tissue samples for MALDI analysis.
  • To enhance the reproducibility and quality of analyte ion signals through improved matrix application.
  • To provide a controlled and efficient system for matrix solution delivery in MALDI sample preparation.

Main Methods:

  • An automated system was engineered using an enclosed spray chamber, a modified commercial air-atomizing spray nozzle, solenoid valves, and a Programmable Logic Controller (PLC).
  • The system controlled the delivery of matrix solutions (e.g., DHB in chloroform/methanol) up to 60 mg/mL.
  • Tissue samples, including rat brain sections, were analyzed using both the developed spray chamber method and inkjet deposition for comparison via linear ion trap MALDI-MS.

Main Results:

  • Optical microscopy confirmed uniform matrix crystal coating on tissue samples prepared with the spray chamber system.
  • MALDI mass spectral imaging of tissues demonstrated superior quality and enhanced reproducibility when using the automated spray chamber method.
  • The automated spray chamber method significantly outperformed inkjet deposition in terms of matrix uniformity and resulting spectral data quality.

Conclusions:

  • The fully-automated spray chamber system provides a robust and reproducible method for uniform matrix deposition in MALDI analysis.
  • This advancement offers improved data quality and efficiency for MALDI mass spectrometry, particularly for biological tissue samples.
  • The developed method represents a significant improvement over traditional and inkjet-based matrix application techniques for MALDI sample preparation.