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Lavandula multifida (Lm), a Mediterranean aromatic plant, was investigated as a natural fluorescent sensor for mercury ion (Hg2⁺) detection. The plant powder was characterized using Fourier Transform Infrared Spectroscopy (FTIR), confirming the presence of bioactive molecules like polyphenols, flavonoids, and terpenes. Aqueous extracts of Lm exhibited strong intrinsic fluorescence, which was efficiently quenched upon the addition of Hg2⁺ ions in seawater, demonstrating high sensitivity with a limit of detection (LOD) of 2.7 nM. A solid-state sensor was further developed by incorporating Lm extract into a Nafion/PET platform, retaining fluorescence properties and allowing visual detection of mercury via color change. These results highilight Lavandula multifida as a promising eco-friendly material for sensitive, selective, and real-time detection of mercury in environmental samples.

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Reusable Lavandula multifida-Based Fluorescent Platform for Ultra-Trace Mercury Detection in Seawater

  • 会议论文

  • 发表日期：

    2025年

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  • Meryam Chelly,
  • Sabrine Chelly,
  • Angelo Ferlazzo,
  • Hanen Bouaziz-Ketata,
  • Giovanni Neri

摘要

Lavandula multifida (Lm), a Mediterranean aromatic plant, was investigated as a natural fluorescent sensor for mercury ion (Hg2⁺) detection. The plant powder was characterized using Fourier Transform Infrared Spectroscopy (FTIR), confirming the presence of bioactive molecules like polyphenols, flavonoids, and terpenes. Aqueous extracts of Lm exhibited strong intrinsic fluorescence, which was efficiently quenched upon the addition of Hg2⁺ ions in seawater, demonstrating high sensitivity with a limit of detection (LOD) of 2.7 nM. A solid-state sensor was further developed by incorporating Lm extract into a Nafion/PET platform, retaining fluorescence properties and allowing visual detection of mercury via color change. These results highilight Lavandula multifida as a promising eco-friendly material for sensitive, selective, and real-time detection of mercury in environmental samples.