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Microbead beating extraction of avian eggs for polycyclic aromatic compounds.

Zhe Xia1, Ifeoluwa Idowu1, Thor Halldorson1

  • 1University of Manitoba, Department of Chemistry, Winnipeg, MB, Canada, R3T 2N2.

Chemosphere
|June 2, 2023
PubMed
Summary

A new microbead beating tissue extraction method offers a faster, more efficient way to measure 75 polycyclic aromatic compounds (PACs) in seabird eggs, crucial for environmental monitoring.

Keywords:
Method validationMicrobead extractionPolycyclic aromatic compoundsSeabird eggs

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Area of Science:

  • Environmental Chemistry
  • Ecotoxicology
  • Analytical Chemistry

Background:

  • Seabird eggs are vital for monitoring environmental contaminants due to their high trophic position.
  • Oil-related compounds are an emerging concern for seabird health in the circumpolar north.
  • Current methods for contaminant analysis in seabird eggs are time-consuming and solvent-intensive.

Purpose of the Study:

  • To develop and validate a novel, efficient method for measuring a wide range of polycyclic aromatic compounds (PACs) in seabird eggs.
  • To reduce sample processing time and solvent usage compared to existing analytical techniques.
  • To ensure high data quality for contaminant monitoring programs.

Main Methods:

  • A microbead beating tissue extraction technique using custom stainless-steel tubes and lids was employed.
  • The method was validated according to ISO/IEC 17025 guidelines.
  • Analysis targeted 75 PACs, including polycyclic aromatic hydrocarbons (PAHs), alkyl-PAHs, halogenated-PAHs, and heterocyclic compounds.

Main Results:

  • Method accuracies for analytes generally ranged from 70-120%.
  • Intra- and inter-day repeatability for most analytes were below 30%.
  • Limits of detection/quantitation were < 0.2/0.6 ng g⁻¹ for all 75 target analytes.
  • Stainless-steel extraction tubes showed significantly lower contamination than plastic alternatives.

Conclusions:

  • The developed microbead beating method provides accurate and repeatable quantification of 75 PACs in seabird eggs.
  • This novel approach significantly reduces sample processing time and solvent requirements.
  • The method meets data quality objectives and offers a superior alternative for seabird contaminant monitoring.