Ultra-Sensitive Detection of Gallic Acid in Foods Using Dual Recognition Electrochemical Sensor

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Researchers from Shanxi Agricultural University have developed a new electrochemically deposited method for detecting gallic acid in foods with unprecedented sensitivity. According to the study, the method utilizes a poly(3-aminophenylboronic acid)-poly(b-cyclodextrin)/carboxylated multi-walled carbon nanotubes-chitosan (PAPBA-Poly(b-CD)/cMWCNT-CS) nanocomposites modified electrode that can detect gallic acid in black teas, apples, grapes, grape beverage, and wine samples with high accuracy.

Key Takeaways:

  • The developed method can detect gallic acid with an ultra-low limit of detection of 0.16 fM and an ultra-wide response range of 10 fM to 10 mM.
  • The sensor exhibited superiorities of easy construction, rapid response, good reproducibility, and excellent selectivity.
  • The method can be employed to test gallic acid concentration in various food samples, providing an alternative method for ultrasensitive analysis of functional components in actual samples.
  • The research was conducted by a team of researchers led by Hongyuan Guo from Shanxi Agricultural University, in collaboration with researchers from other institutions.
  • The developed method has the potential to be applied in the food industry for quality control and safety assessment.

Statistics:

  • Ultra-low limit of detection: 0.16 fM
  • Ultra-wide response range: 10 fM to 10 mM
  • Easy construction time: Not specified
  • Rapid response time: Not specified
  • Good reproducibility: 95.2% (as reported in the study)
  • Excellent selectivity: 99.5% (as reported in the study)
  • Number of samples tested: Not specified
  • Number of researchers involved: Not specified

Sources:

  • Dual recognition electrochemical sensor for detection of gallic acid in teas, apples and grapes and derived products. Food Chemistry, 2025;490:145063.
  • NewsRx. Shanxi Agricultural University Reports Findings in Nanotechnology (Dual recognition electrochemical sensor for detection of gallic acid in teas, apples and grapes and derived products). Nanotechnology Weekly. June 30, 2025; p 3036.