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Cadmium purification and quantification using immunochromatography.

Kazuhiro Sasaki1, Nunnarpas Yongvongsoontorn, Kei Tawarada

  • 1Central Research Institute of Electric Power Industry, Abiko-shi, Chiba, Japan. k-sasaki@criepi.denken.or.jp

Journal of Agricultural and Food Chemistry
|June 4, 2009
PubMed
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This study introduces a new immunochromatography method for detecting cadmium in agricultural products. This method offers a reliable alternative for monitoring cadmium levels and managing human intake.

Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Food Safety

Background:

  • Cadmium contamination in agricultural products poses a risk to human health through dietary intake.
  • Effective monitoring of cadmium is crucial for managing human exposure and ensuring food safety.

Purpose of the Study:

  • To develop and validate an immunochromatographic method for cadmium purification and quantification.
  • To offer an alternative analytical approach for cadmium detection in various agricultural samples.

Main Methods:

  • Development of an immunochromatography assay using monoclonal antibody Nx2C3 specific to Cd.EDTA.
  • Utilization of a chelate column with quaternary ammonium salts for cadmium purification from HCl extracts.
  • Quantification of cadmium in samples including rice, tomato, lettuce, garden pea, Arabidopsis thaliana, soil, and fertilizer.

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Main Results:

  • The immunochromatography method accurately quantifies cadmium in the range of 0.01 to 0.1 mg/L with a 20% mean coefficient of variance.
  • Cadmium purification via the chelate column achieved near 100% recovery, with the lowest at 76.6% from rice leaves.
  • Results from immunochromatography closely correlated with instrumental analysis (ICP-AES/ICP-MS), showing recoveries from 98% to 116%.

Conclusions:

  • The developed immunochromatographic method provides a viable and accurate alternative for cadmium analysis in agricultural products.
  • This method aids in effective cadmium monitoring, contributing to better management of dietary cadmium intake and food safety.