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Related Concept Videos

Mass Spectrometry: Complex Analysis01:21

Mass Spectrometry: Complex Analysis

874
Mass spectrometry is an important technique for the identification of pure compounds. However, it has some limitations for the analysis of complex mixtures, often due to excessive fragmentation making the spectrum too complicated to decipher. Mass spectrometry can be combined with suitable separation methods in sequence, forming hyphenated methods, which are useful in the analysis of complex mixtures.
GC–MS is a powerful hyphenated method commonly used in forensics and environmental...
874

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A Plasma Sample Preparation for Mass Spectrometry using an Automated Workstation
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Paper-based sample processing for the fast and direct MS analysis of multiple analytes from serum samples.

Fu Zhang1, Bin Ji2, Xiang-Hong Yan1

  • 1Chemistry Department, College of Sciences, Northeastern University, Shenyang 110819, China. zywu@mail.neu.edu.cn.

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|September 28, 2022
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Summary

This study introduces a rapid paper-based device for analyzing amino acids in blood using isotope-dilution mass spectrometry. The novel method achieves fast separation and purification, aiding in disease diagnosis.

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Area of Science:

  • Biochemistry
  • Analytical Chemistry
  • Biomedical Engineering

Background:

  • Amino acids are crucial biomarkers for human health and disease diagnosis.
  • Rapid and accurate determination of amino acids is essential for timely medical intervention.
  • Existing methods for amino acid analysis can be time-consuming and require complex sample preparation.

Purpose of the Study:

  • To develop a novel, rapid, paper-based sample-processing device for amino acid analysis.
  • To combine this device with isotope-dilution mass spectrometry (IDMS) for efficient blood sample analysis.
  • To achieve fast separation and purification of target amino acids from complex biological matrices.

Main Methods:

  • Utilized a paper-based device with isoelectric focusing electrokinetic separation.
  • Established a stable pH gradient (pH 3-10.5) on glass-fiber paper using a MS-friendly electrolyte.
  • Employed DC voltage for separation and concentration of amphoteric species within 2 minutes.
  • Applied the method to both liquid and dry spot blood samples for direct IDMS detection.

Main Results:

  • Achieved separation and purification of 11 amino acids from blood samples.
  • Demonstrated a 20-fold increase in speed compared to commercial kit methods.
  • Successfully concentrated amino acids into a narrow band for direct MS detection.
  • Validated the method for both liquid and dry spot blood samples.

Conclusions:

  • The developed paper-based device coupled with IDMS offers a rapid and efficient strategy for amino acid analysis.
  • This approach significantly reduces analysis time and sample preparation complexity.
  • It presents a promising tool for rapid, on-site diagnosis and monitoring of diseases related to amino acid metabolism.