Ye Haoxin, Esfahani Ehsan Banayan, Chiu Ivy, Mohseni Madjid, Gao Guang, Yang Tianxi
Food, Nutrition and Health Program, Faculty of Land and Food Systems, The University of British Columbia, Vancouver V6T1Z4, Canada.
Department of Chemical and Biological Engineering, The University of British Columbia, Vancouver V6T1Z4, Canada.
J Hazard Mater. 2024 May 15;470:134194. doi: 10.1016/j.jhazmat.2024.134194. Epub 2024 Apr 1.
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.
环境生态系统中纳米塑料污染的日益普遍已成为一种重大的健康危害。传统分析方法并不理想，受到其在低浓度下分析纳米塑料效率低下以及耗时过程的阻碍。在此背景下，我们开发了一种创新方法，该方法采用发光金属 - 酚醛网络（L - MPNs）与表面增强拉曼光谱（SERS）相结合来分离和标记纳米塑料，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 - MPNs对各种尺寸（50 - 500纳米）和类型（例如聚苯乙烯、聚甲基丙烯酸甲酯、聚乳酸）的纳米塑料进行均匀标记。罗丹明B（RhB）在这些基于L - MPNs的SERS标签中充当拉曼报告分子，为纳米塑料的痕量测量提供必要的灵敏度。此外，用L - MPNs进行标记有助于从液体介质中有效分离纳米塑料。利用便携式拉曼仪器，我们的方法具有成本效益高、快速且可现场部署的检测能力，在纳米塑料分析中具有出色的灵敏度，检测阈值低至0.1μg/mL。总体而言，本研究提出了一种极具前景的策略，用于对广泛的颗粒分析物进行可靠且灵敏的分析，L - MPNs与SERS技术结合时的有效标记性能突出了这一点。
