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Related Experiment Videos

Plasma source mass spectrometry in experimental nutrition

R M Barnes1

  • 1Department of Chemistry, Lederle Graduate Research Center, University of Massachusetts, Amherst, USA.

Advances in Experimental Medicine and Biology
|October 22, 1998
PubMed
Summary

Stable isotopes are now more applicable for nutritional modeling thanks to inductively coupled plasma mass spectrometers (ICP-MS). This review covers ICP-MS capabilities, limitations, and applications for stable isotope analysis in biological samples and speciation.

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Area of Science:

  • Analytical Chemistry
  • Biogeochemistry
  • Nutritional Science

Background:

  • The advent of inductively coupled plasma mass spectrometry (ICP-MS) has revolutionized stable isotope analysis.
  • ICP-MS instruments offer enhanced sensitivity and extended applications for stable isotopes in nutritional modeling.
  • Stable isotopes are crucial tracers in understanding metabolic pathways and nutritional requirements.

Purpose of the Study:

  • To review the current status of research and commercial ICP-MS instruments for stable isotopic studies.
  • To examine the impact of mass spectrometry resolution and sensitivity on isotope analysis.
  • To explore requirements for reliable isotope measurements in biological matrices and for speciation analysis.

Main Methods:

  • Review of existing research and commercial ICP-MS instrumentation.

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  • Analysis of mass spectroscopic parameters including resolution and sensitivity.
  • Consideration of sample preparation and analytical requirements for biological tissues and fluids.
  • Exploration of hyphenated techniques combining ICP-MS with separation methods (e.g., chromatography, electrophoresis).

    • Main Results:

    • ICP-MS significantly enhances the utility of stable isotopes in nutritional research.
    • Different ICP-MS types (quadrupole, sector, time-of-flight, trap) vary in their suitability for stable isotope analysis.
    • Challenges remain in achieving reliable measurements in complex biological samples and for specific compound analysis (speciation).

    Conclusions:

    • ICP-MS is a powerful tool for stable isotope applications in nutrition and beyond.
    • Careful consideration of instrument capabilities and analytical methods is essential for accurate stable isotope measurements.
    • Future directions include improved speciation analysis through hyphenated ICP-MS techniques.