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Gold nanoclusters-based fluorescence sensor array for herbicides qualitative and quantitative analysis.

Jingyu Zhang1, Huihui Hu1, Jian Wang1

  • 1State Key Laboratory of Natural Medicines, Key Laboratory of Drug Quality Control and Pharmacovigilance, Ministry of Education, School of Basic Medical Sciences and Clinical Pharmacy, China Pharmaceutical University, Nanjing, Jiangsu, 211198, China.

Analytica Chimica Acta
|March 10, 2024
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Summary
This summary is machine-generated.

This study developed a novel fluorescence sensor array for accurate herbicide detection. The sensor effectively distinguishes and identifies auxin herbicides in real samples, ensuring environmental and human safety.

Keywords:
Au nanoclustersFluorescence sensor arrayHerbicidesMetal ions

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Area of Science:

  • Environmental Chemistry
  • Analytical Chemistry
  • Nanotechnology

Background:

  • Widespread herbicide use poses risks to ecosystems and human health.
  • Accurate and sensitive herbicide detection methods are essential for environmental monitoring and safety.
  • Existing detection methods may lack the sensitivity or specificity required for complex environmental samples.

Purpose of the Study:

  • To develop a simple and sensitive fluorescence sensor array for the discrimination and identification of herbicides.
  • To investigate the mechanism of fluorescence restoration by auxin herbicides.
  • To evaluate the sensor array's performance in real-world sample analysis.

Main Methods:

  • Preparation of fluorescent gold nanoclusters modified with specific ligands.
  • Utilizing metal ion-induced fluorescence quenching and subsequent restoration by auxin herbicides.
  • Employing principal component analysis (PCA) and hierarchical cluster analysis (HCA) for data interpretation.
  • Testing the sensor array with real and blind environmental samples.

Main Results:

  • A sensitive "on-off-on" fluorescence sensor array was successfully constructed.
  • Auxin herbicides demonstrated distinct fluorescence restoration patterns due to binding with metal ions and re-dispersing nanoclusters.
  • PCA and HCA effectively separated and identified different auxin herbicides within a concentration range of 40-500 μm.
  • The sensor array showed high accuracy in detecting herbicides in real and blind samples.

Conclusions:

  • The developed fluorescence sensor array provides a promising tool for the selective and sensitive detection of herbicides.
  • This method offers a practical approach for environmental monitoring and ensuring human health safety from herbicide exposure.
  • The sensor system's ability to discriminate between different auxin herbicides highlights its potential for targeted environmental risk assessment.