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Related Experiment Video

Updated: Apr 22, 2026

Natural Product Discovery with LC-MS/MS Diagnostic Fragmentation Filtering: Application for Microcystin Analysis
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Broad Cross-Reactivity of a Microcystin ELISA Confirmed Using 19 Quantitative Reference Materials.

Ingunn A Samdal1, Luisa Florizoone1, Kjersti L E Løvberg1

  • 1Norwegian Veterinary Institute, P.O. Box 64, N-1431 Ås, Norway.

Analytical Chemistry
|April 20, 2026
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Summary

A new ELISA method detects all microcystins (MCs), potent cyanotoxins, in a single test. This rapid, cost-effective tool enhances public health protection against MC contamination in water and food.

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Area of Science:

  • Environmental Science
  • Toxicology
  • Analytical Chemistry

Background:

  • Microcystins (MCs) are hepatotoxic cyanotoxins found globally, posing risks through contaminated water, food, and recreational activities.
  • Over 300 MC variants exist, complicating analysis as standards are limited, necessitating a comprehensive detection method.
  • Acute MC exposure can lead to severe liver damage, highlighting the need for effective monitoring.

Purpose of the Study:

  • To develop a rapid, cost-effective immunoassay for detecting diverse microcystin variants in a single analysis.
  • To improve upon existing ELISA methods by enhancing cross-reactivity across a wider range of MCs and related toxins.
  • To provide a sensitive tool for quantifying total MCs in various sample matrices for public health protection.

Main Methods:

  • Development of an enzyme-linked immunosorbent assay (ELISA) using antibodies raised against a mixture of MCs (ELISA5b and ELISA9b).
  • Comparative analysis of ELISA cross-reactivity using 19 reference materials of MCs and nodularin-R.
  • Validation of ELISA9b performance by correlating results with ELISA5b and liquid chromatography-high-resolution mass spectrometry (LC-HRMS) in water and biological samples.

Main Results:

  • ELISA9b demonstrated superior cross-reactivity with 19 reference materials compared to ELISA5b.
  • ELISA9b results showed excellent correlation with established methods (ELISA5b and LC-HRMS) in diverse sample types.
  • The limit of quantitation for total MCs in drinking water using ELISA9b was 0.06 μg/L, significantly below the WHO guideline.

Conclusions:

  • The developed ELISA9b is a promising tool for the rapid, sensitive, and comprehensive quantification of total microcystins.
  • This method effectively detects various MC variants, including metabolites and conjugates, across different sample matrices.
  • ELISA9b offers a valuable approach for routine monitoring and safeguarding public health from cyanotoxin exposure.