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<p>The detection of sodium tetraborate (ST) in meat is crucial for protecting human health. Surface analysis is a rapid onsite analytical technique suitable for food safety screening because of its timeliness. Therefore, we propose a kind of versatile ratiometric probe (TPQDs) for fluorescence (FL) and visual FL (VFL) detection of ST on meat surfaces by using tetraphenylethylene (TPE), Mn-doped ZnS quantum dots (QDs), and polyvinyl alcohol (PVA). TPE in TPQDs exhibits a weak emission at 445&#xa0;nm because of its free intramolecular motions in the absence of ST. Upon adding ST, these motions become restricted because of the formation of the ST–PVA complex and the consequent viscosity increase of the probe solution. Consequently, the FL intensity of TPE is enhanced because of the aggregation-induced emission effect, whereas that of Mn-doped ZnS QDs at 605&#xa0;nm negligibly changes. Quantitative analysis of ST is performed by studying the change in the FL intensity ratio of TPE to QDs. The detection limits of TPQD-based FL and VFL methods for ST are 4.77 and 150&#xa0;μg/L, respectively. Probe TPQDs are successfully applied to detect ST on pork and chicken meat surfaces when combined with the simple extraction and drop-casting sampling approaches, respectively. These results are verified via inductively coupled plasma optical emission spectrometry. These probe TPQDs possess great potential for rapid onsite ST analysis because of their good detection performance.</p>

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Aggregation-Induced Emission Probe for Ratiometric Fluorescence Detection of Sodium Tetraborate on Meat Surfaces

  • 期刊论文

  • 发表日期：

    2025年6月17日

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  • Shiwei Yang,
  • Wanli Fan,
  • Lulu Miao,
  • Jiajia Yang,
  • Wenjun Wang,
  • Jun Xu,
  • Dongsheng Zhao,
  • Meikun Fan

摘要

The detection of sodium tetraborate (ST) in meat is crucial for protecting human health. Surface analysis is a rapid onsite analytical technique suitable for food safety screening because of its timeliness. Therefore, we propose a kind of versatile ratiometric probe (TPQDs) for fluorescence (FL) and visual FL (VFL) detection of ST on meat surfaces by using tetraphenylethylene (TPE), Mn-doped ZnS quantum dots (QDs), and polyvinyl alcohol (PVA). TPE in TPQDs exhibits a weak emission at 445 nm because of its free intramolecular motions in the absence of ST. Upon adding ST, these motions become restricted because of the formation of the ST–PVA complex and the consequent viscosity increase of the probe solution. Consequently, the FL intensity of TPE is enhanced because of the aggregation-induced emission effect, whereas that of Mn-doped ZnS QDs at 605 nm negligibly changes. Quantitative analysis of ST is performed by studying the change in the FL intensity ratio of TPE to QDs. The detection limits of TPQD-based FL and VFL methods for ST are 4.77 and 150 μg/L, respectively. Probe TPQDs are successfully applied to detect ST on pork and chicken meat surfaces when combined with the simple extraction and drop-casting sampling approaches, respectively. These results are verified via inductively coupled plasma optical emission spectrometry. These probe TPQDs possess great potential for rapid onsite ST analysis because of their good detection performance.