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Related Experiment Videos

Trends in certified reference materials for the speciation of trace elements.

R Cornelis1, H Crews, O F Donard

  • 1Laboratory for Analytical Chemistry, University of Gent, Belgium. rita.cornelis@rug.ac.be

Fresenius' Journal of Analytical Chemistry
|July 14, 2001
PubMed
Summary

Element speciation analysis is crucial for understanding chemical behavior. However, limited certified reference materials (CRMs) and unstable species necessitate new analytical approaches, including in-situ measurements.

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Area of Science:

  • Analytical Chemistry
  • Environmental Science
  • Biogeochemistry

Background:

  • Element speciation, not just total concentration, dictates biochemical and geochemical behavior.
  • Accurate speciation analysis relies on certified reference materials (CRMs).
  • Current CRMs for trace element species are scarce, with key examples including environmental CRMs for trialkyltin, methylmercury, and Cr(III)/Cr(VI), and food CRMs for arsenic and methylmercury.

Purpose of the Study:

  • To highlight the growing importance of element speciation in analytical chemistry.
  • To identify the limitations in the availability of certified reference materials for speciation analysis.
  • To discuss future trends and challenges in developing new CRMs and analytical methods.

Main Methods:

  • Review of existing certified reference materials for trace element speciation.

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  • Identification of key areas for future CRM development (environmental, food bioavailability, bio-monitoring).
  • Discussion of analytical challenges posed by unstable and short-lived species.

    • Main Results:

    • The number of available CRMs for trace element species is very limited.
    • Significant developments in CRMs are anticipated for environmental issues, food bioavailability, and occupational health.
    • Existing CRMs primarily cover specific environmental and food contaminants.

    Conclusions:

    • The trend towards element speciation analysis is irreversible due to its importance in understanding elemental behavior.
    • The limited availability of CRMs and the instability of many species present significant challenges.
    • Future analytical developments, including in-situ analysis, may require a re-evaluation of the traditional CRM concept.