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Updated: Jul 15, 2026

Sampling and Identification of Microplastics in Groundwater
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Sampling and Identification of Microplastics in Groundwater

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Selective Recognition and Portable Quantification of PVC Microplastics Using a Water-Soluble AIE Fluorescent Probe.

Meng-Ting Wang1, Siru Wang1, Chao-Hai Jian1

  • 1Key Laboratory of Pollution Control Chemistry and Environmental Functional Materials for Qinghai-Tibet Plateau of the National Ethnic Affairs Commission, School of Chemistry and Environment, Southwest Minzu University, Chengdu 610041, Sichuan, China.

Analytical Chemistry
|July 14, 2026
PubMed
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A new fluorescent probe, BTPA-QM-SO3, offers rapid and selective detection of polyvinyl chloride (PVC) microplastics in water. This method enables accurate quantification in various water samples, addressing a key environmental challenge.

Area of Science:

  • Environmental Science
  • Analytical Chemistry
  • Materials Science

Background:

  • Microplastic pollution, especially from polyvinyl chloride (PVC), poses environmental risks due to persistence and additive leaching.
  • Selective and rapid detection of PVC microplastics in aquatic environments is currently challenging.

Purpose of the Study:

  • To develop a water-soluble fluorescent probe for selective staining and quantitative detection of PVC microplastics.
  • To establish a simple, water-compatible fluorescence strategy for environmental monitoring.

Main Methods:

  • Development of an aggregation-induced emission (AIE) fluorescent probe (BTPA-QM-SO3).
  • Application of the probe for direct fluorescence labeling in water without pretreatment.
  • Utilizing an ethanol-assisted washing strategy to enhance selectivity.

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Last Updated: Jul 15, 2026

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  • Employing fluorescence imaging and image-based analysis for quantification.

    • Main Results:

    • The probe exhibits a distinct turn-on fluorescence response specifically toward PVC.
    • The method shows a linear response to PVC microplastics (200–1000 μg/mL) with a low detection limit (10.52 μg/mL).
    • Satisfactory recoveries were achieved in diverse water matrices (tap, lake, seawater, industrial wastewater).

    Conclusions:

    • The developed AIE probe provides a simple, water-compatible, and selective fluorescence strategy for PVC microplastic quantification.
    • Enhanced fluorescence emission is attributed to restricted intramolecular motion and suppressed nonradiative decay upon interaction with PVC.
    • Stronger interfacial interactions between the probe and PVC contribute to improved selectivity and fluorescence retention.