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Related Concept Videos

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

Matrix-Assisted Laser Desorption Ionization (MALDI)

699
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 spectrometry is 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 material. The...
699

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Dithranol as a Matrix for Matrix Assisted Laser Desorption/Ionization Imaging on a Fourier Transform Ion Cyclotron Resonance Mass Spectrometer
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A Polymer-Based Matrix for Effective SALDI Analysis of Lipids.

Jing Yu1, Yan Kang1, Hongyang Zhang2

  • 1School of Chemistry and Molecular Engineering & Shanghai Key Laboratory of Functional Materials Chemistry, and Research Centre of Analysis and Test, East China University of Science and Technology, Shanghai 200237, China.

Journal of the American Society for Mass Spectrometry
|April 27, 2021
PubMed
Summary

Modified polyvinylidene fluoride (PVDF) serves as a novel matrix for surface-assisted laser desorption/ionization mass spectrometry (SALDI MS) and imaging. This low-cost material enhances lipid detection in serum and tissue, offering high sensitivity and low background interference.

Keywords:
PVDF modificationSALDI MSlipidspolymer-based matrix

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Area of Science:

  • Analytical Chemistry
  • Materials Science

Background:

  • Surface-assisted laser desorption/ionization (SALDI) is a matrix-free technique for analyzing small molecules.
  • Traditional matrix-assisted laser desorption/ionization (MALDI) can suffer from matrix interference.
  • Developing accessible and effective SALDI matrices is crucial for sensitive molecular detection.

Purpose of the Study:

  • To investigate alkali-treated polyvinylidene fluoride (PVDF) as a novel matrix for SALDI mass spectrometry (MS) and imaging.
  • To evaluate the performance of modified PVDF for lipid analysis in complex biological samples.
  • To demonstrate the utility of modified PVDF as a dual-mode substrate for both SALDI MS and imaging.

Main Methods:

  • Facile alkali treatment was employed to modify polyvinylidene fluoride (PVDF).
  • Modified PVDF (powder and membrane) was used as a matrix for SALDI MS analysis of lipids.
  • SALDI imaging was performed directly on mouse kidney tissue sections using a modified PVDF membrane.
  • Lipid analysis was conducted on raw and extracted serum samples.

Main Results:

  • Modified PVDF exhibited strong optical absorption and suitability as a dual-mode SALDI substrate.
  • PVDF powder demonstrated superior performance in SALDI MS for lipids, including triacylglycerols (TAGs) and fatty acids, with high sensitivity and reproducibility.
  • Lipids in both raw and extracted serum were successfully detected using modified PVDF powder.
  • A modified PVDF membrane facilitated direct SALDI imaging of TAGs and cholesteryl esters in mouse kidney tissue, showing enhanced signals and no matrix coating.

Conclusions:

  • Alkali-treated PVDF is a cost-effective and highly accessible material for SALDI MS and imaging.
  • Modified PVDF offers significant advantages for lipid analysis, including enhanced sensitivity, reproducibility, and reduced background interference.
  • This study introduces modified PVDF materials as promising matrices for SALDI MS and imaging applications for the first time.