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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...
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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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Matrix-Assisted Laser Desorption Ionization (MALDI)

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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Digital Microfluidics for Automated Proteomic Processing
10:55

Digital Microfluidics for Automated Proteomic Processing

Published on: November 6, 2009

An integrated digital microfluidic chip for multiplexed proteomic sample preparation and analysis by MALDI-MS.

Hyejin Moon1, Aaron R Wheeler, Robin L Garrell

  • 1Mechanical and Aerospace Engineering Department, University of California, Los Angeles (UCLA), Los Angeles, CA 90095, USA.

Lab on a Chip
|August 25, 2006
PubMed
Summary

This study introduces a novel digital microfluidic chip for automated, high-throughput sample preparation in Matrix Assisted Laser Desorption/Ionization Mass Spectrometry (MALDI-MS). The chip enables multiplexed droplet generation and parallel purification, streamlining proteomic analysis.

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Area of Science:

  • Microfluidics
  • Mass Spectrometry
  • Proteomics

Background:

  • High-throughput Matrix Assisted Laser Desorption/Ionization Mass Spectrometry (MALDI-MS) requires efficient sample preparation.
  • Current methods are often manual, time-consuming, and limit throughput.

Purpose of the Study:

  • To develop an integrated digital microfluidic chip for multiplexed sample preparation for MALDI-MS.
  • To introduce novel electrowetting-on-dielectric (EWOD) functions for droplet generation and in-line purification.

Main Methods:

  • Utilized electrowetting-on-dielectric (EWOD) actuation for droplet manipulation.
  • Developed a specific voltage sequence for generating droplets from multiple reservoirs.
  • Designed a novel "box-in-box" electrode pattern for robust in-line sample purification over dried spots.
  • Demonstrated parallel processing of multiple sample droplets on the chip.

Main Results:

  • Successfully generated series of droplets from proteomic samples, rinsing fluid, and MALDI reagents using EWOD in air.
  • Achieved robust in-line sample purification through parallel processing on the integrated chip.
  • Obtained good quality Mass Spectrometry (MS) results directly from the EWOD-MALDI-MS device.

Conclusions:

  • The developed EWOD chip enables automated, multiplexed sample preparation for high-throughput MALDI-MS.
  • This technology is a significant step towards automating tedious sample preparation processes in proteomics.
  • The integrated system shows promise for various high-throughput proteomics applications beyond MALDI-MS.