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<p>Bisulfite (HSO<sub>3</sub><sup>−</sup>) is widely used as a preservative and antibacterial agent, and its abuse and residues have long been a focal point in analytical detection. Its monitoring is of significant importance to food safety. In this study, a triphenylamine derivative (<b>TPA-tpd</b>) was synthesized, which exhibits no fluorescence in a DMSO/Tris (3/7, v/v, pH = 7.4) solution. The nucleophilic addition reaction between HSO<sub>3</sub><sup>−</sup> and <b>TPA-tpd</b> generates strong fluorescence, thus achieving fluorescent “turn-on” recognition of HSO<sub>3</sub>⁻. <b>TPA-tpd</b> exhibits excellent anti-interference ability, a low detection limit (0.17 µM), and a fast response time for HSO<sub>3</sub>⁻ detection. It enables dual-channel detection of HSO<sub>3</sub><sup>−</sup> through both colorimetric and fluorescence methods. Application studies demonstrate that <b>TPA-tpd</b> can detect HSO<sub>3</sub><sup>−</sup> in red wine and white sugar samples with high accuracy and precision, and it also enables fluorescence imaging of HSO<sub>3</sub><sup>−</sup> in living cells. <b>TPA-tpd</b> maintains a low cytotoxicity and provides a novel tool for detection in the food safety field and fluorescence imaging in the biological system.</p> Graphical abstract <p></p>

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A novel triphenylamine-based fluorescent probe for bisulfite detection in red wine and white sugar samples

  • 期刊论文

  • 发表日期：

    2026年5月11日

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  • Yizhu Jiang,
  • Xiaoling Hu,
  • Keli Zhong,
  • Tianyu Liang,
  • Chengyan Wu,
  • Mingyu Tian,
  • Lijun Tang

摘要

Bisulfite (HSO3−) is widely used as a preservative and antibacterial agent, and its abuse and residues have long been a focal point in analytical detection. Its monitoring is of significant importance to food safety. In this study, a triphenylamine derivative (TPA-tpd) was synthesized, which exhibits no fluorescence in a DMSO/Tris (3/7, v/v, pH = 7.4) solution. The nucleophilic addition reaction between HSO3− and TPA-tpd generates strong fluorescence, thus achieving fluorescent “turn-on” recognition of HSO3⁻. TPA-tpd exhibits excellent anti-interference ability, a low detection limit (0.17 µM), and a fast response time for HSO3⁻ detection. It enables dual-channel detection of HSO3− through both colorimetric and fluorescence methods. Application studies demonstrate that TPA-tpd can detect HSO3− in red wine and white sugar samples with high accuracy and precision, and it also enables fluorescence imaging of HSO3− in living cells. TPA-tpd maintains a low cytotoxicity and provides a novel tool for detection in the food safety field and fluorescence imaging in the biological system.

Graphical abstract