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Related Concept Videos

Photoluminescence: Applications01:14

Photoluminescence: Applications

383
Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
383
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  11. Synergistic Pet/ife-driven Fluorescence-phosphorescence Dual Signal Quenching In Rtp Cds Sensor For Sensitive Thiram Monitoring In Food Safety

Synergistic PET/IFE-driven fluorescence-phosphorescence dual signal quenching in RTP CDs sensor for sensitive thiram monitoring in food safety

Yunhai Chen1, Xuecheng Zhu1, Huilin Liu2

  • 1Ministry of Education, Beijing Technology and Business University, 11 Fucheng Road, Beijing, 100048, China.

Mikrochimica Acta
|June 12, 2025

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View abstract on PubMed

Summary
This summary is machine-generated.

A new dual signal sensor detects thiram pesticide residues in food. This copper-doped carbon dot sensor offers rapid, reliable, and self-calibrating detection for enhanced food safety.

Area of Science:

  • Analytical Chemistry
  • Materials Science
  • Food Science

Background:

  • Thiram is a widely used fungicide in agriculture.
  • Thiram residues in fruits and vegetables pose significant health risks.
  • Rapid and reliable detection methods for thiram are crucial for food safety.

Purpose of the Study:

  • To develop a novel dual signal sensor for sensitive and selective thiram detection.
  • To utilize copper-doped room temperature phosphorescence carbon dots (Cu-CDs@BA) for pesticide residue analysis.
  • To establish an intrinsic self-calibration mechanism for enhanced detection accuracy.

Main Methods:

  • Fabrication of a copper-doped carbon dot (Cu-CDs) sensor embedded in a boric acid matrix (BA).
  • Utilizing the synergistic effects of fluorescence and phosphorescence emissions for dual signal detection.
Keywords:
Copper-doped carbon dotsDual signal detectionPhotoinduced electron transferRoom temperature phosphorescence

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  • Investigating the quenching mechanisms (photoinduced electron transfer and inner filter effect) upon thiram interaction.
  • Validating the sensor's performance in real food matrices (banana, carrot).

    • Main Results:

    • The Cu-CDs@BA sensor demonstrated stable room temperature phosphorescence (RTP) due to the rigid B2O3 matrix.
    • A dual signal quenching mechanism effectively detected thiram via Cu2+-thiram complex formation.
    • The sensor exhibited high selectivity, rapid response (<5 min), and an intrinsic self-calibration capability.
    • Successful spiked recovery experiments confirmed the sensor's practicality and reliability in complex food samples.

    Conclusions:

    • The developed dual signal sensor provides a novel and effective strategy for rapid pesticide residue detection.
    • This approach addresses critical needs in food safety and environmental monitoring by offering a reliable thiram detection method.
    • The intrinsic self-calibration mechanism enhances sensitivity and compensates for environmental variations, paving the way for advanced analytical tools.
    Thiram