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Author Spotlight: Technologies and Challenges in Elemental Analysis of Food Samples
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Method Development for Direct Multielement Quantification by LA-ICP-MS in Food Samples.

Yatai Li1, Wei Guo1, Zhaochu Hu2

  • 1State Key Laboratory of Biogeology and Environmental Geology, Faculty of Earth Sciences , China University of Geosciences , Wuhan 430074 , PR China.

Journal of Agricultural and Food Chemistry
|December 29, 2018
PubMed
Summary
This summary is machine-generated.

A new method uses spiked agarose gels for accurate elemental analysis in food. This approach enhances accuracy and speeds up testing for essential and toxic elements in various food types.

Keywords:
LA-ICP-MSagarose-gel external standardscarbon internal standarddirect multielement quantificationfood samples

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Area of Science:

  • Analytical Chemistry
  • Food Science
  • Materials Science

Background:

  • Accurate elemental analysis in food is crucial for safety and nutrition.
  • Existing calibration methods can be complex and time-consuming.
  • Matrix-matched standards are essential for reliable quantification.

Purpose of the Study:

  • To develop a novel, accurate, and efficient calibration strategy for elemental analysis in food.
  • To synthesize and validate spiked agarose gels as matrix-matched external standards.
  • To improve the throughput of elemental analysis in food samples.

Main Methods:

  • Synthesized spiked agarose gels (4% m/v) with known analyte concentrations.
  • Utilized laser ablation-inductively coupled plasma mass spectrometry (LA-ICP-MS) for spatial distribution analysis.
  • Employed carbon as an internal standard (IS) for quantification.
  • Developed a porous rubber sample supporter to enhance analysis speed.

Main Results:

  • Agarose gel standards exhibited excellent homogeneity (RSD <10%) and analyte recovery (86.9-94.7%).
  • Achieved low limits of detection (LODs) for various elements, from 0.0005 μg g⁻¹ (Rb) to 33.7 μg g⁻¹ (S).
  • Analysis results showed good agreement with certified reference materials (CRMs).
  • The developed sample supporter increased analysis throughput approximately 3-fold.

Conclusions:

  • Spiked agarose gels provide a reliable and effective matrix-matched calibration strategy for elemental analysis in plant and animal-based foods.
  • The method offers high accuracy, good homogeneity, and improved efficiency.
  • This approach facilitates precise determination of essential and toxic elements, contributing to food safety and quality assessment.