The escalating prevalence of nanoplastics contamination in environmental ecosystems has emerged as a significant health hazard. Conventional analytical methods are suboptimal, hindered by their inefficiency in analyzing nanoplastics at low concentrations and their time-intensive processes. In this context, we have developed an innovative approach that employs luminescent metal–phenolic networks (L-MPNs) coupled with surface-enhanced Raman spectroscopy (SERS) to separate and label nanoplastics, enabling rapid, sensitive and quantitative detection. Our strategy utilizes L-MPNs composed of zirconium ions, tannic acid, and rhodamine B to uniformly label nanoplastics across a spectrum of sizes (50–500 nm) and types (e.g., polystyrene, polymethyl methacrylate, polylactic acid). Rhodamine B (RhB) functions as a Raman reporter within these L-MPNs-based SERS tags, providing the requisite sensitivity for trace measurement of nanoplastics. Moreover, the labeling with L-MPNs aids in the efficient separation of nanoplastics from liquid media. Utilizing a portable Raman instrument, our methodology offers cost-effective, swift, and field-deployable detection capabilities, with excellent sensitivity in nanoplastic analysis and a detection threshold as low as 0.1 μg/mL. Overall, this study proposes a highly promising strategy for the robust and sensitive analysis of a broad spectrum of particle analytes, underscored by the effective labeling performance of L-MPNs when coupled with SERS techniques.

中文翻译：

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使用表面增强拉曼散射定量快速检测发光金属酚网络标记的纳米塑料

环境生态系统中纳米塑料污染的不断加剧已成为严重的健康危害。传统的分析方法并不是最理想的，因为它们在分析低浓度纳米塑料时效率低下且过程耗时。在此背景下，我们开发了一种创新方法，采用发光金属-酚网络（L-MPN）与表面增强拉曼光谱（SERS）相结合来分离和标记纳米塑料，从而实现快速、灵敏和定量检测。我们的策略利用由锆离子、单宁酸和罗丹明 B 组成的 L-MPN 来统一标记各种尺寸（50-500 nm）和类型（例如聚苯乙烯、聚甲基丙烯酸甲酯、聚乳酸）的纳米塑料。罗丹明 B (RhB) 在这些基于 L-MPN 的 SERS 标签中充当拉曼报道分子，为纳米塑料的痕量测量提供必要的灵敏度。此外，L-MPN 标记有助于纳米塑料与液体介质的有效分离。我们的方法利用便携式拉曼仪器，提供经济高效、快速且可现场部署的检测功能，在纳米塑料分析中具有出色的灵敏度，检测阈值低至 0.1 μg/mL。总体而言，这项研究提出了一种非常有前途的策略，用于对广谱颗粒分析物进行稳健和灵敏的分析，L-MPN 与 SERS 技术结合时的有效标记性能强调了这一点。