Integrated sampling and in situ SERS detection of diquat and paraquat using silver nanostars-modified PTFE substrates

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL

Microchimica Acta Pub Date : 2025-10-06 DOI:10.1007/s00604-025-07555-6

Hui Pan, Meng Jin, Hua Shao, Xiao Meng, Haiyan Wei, Xinyuan Zhao, Ge Gao, Wei Zhang, Cuijuan Wang

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引用次数: 0

Abstract

A surface-enhanced Raman spectroscopy (SERS) strategy for integrated sampling and in situ detection of diquat (DQ) and paraquat (PQ) in air and water is presented. By leveraging the unique characteristics of the SERS fingerprint alongside the exceptional adsorption capacity of porous polytetrafluoroethylene (PTFE) membranes, we synthesized a composite substrate consisting of porous PTFE and silver nanostars (AgNSts). Utilizing the AgNSts@PTFE filter, DQ and PQ can be sampled with an air sampler and detected in situ using a portable Raman spectrometer effectively, without pre-processing steps. Strong correlations were found between SERS intensity and logarithmic analyte concentration, with R² values between 0.937 and 0.968. The detection limits for DQ and PQ were 0.74 ppb and 0.23 ppb, respectively, and are below the permissible concentrations. This study presents a novel, rapid method for detecting DQ and PQ in aerosols in non-laboratory settings, offering an alternative approach to conventional techniques.

Graphical Abstract

查看原文本刊更多论文

银纳米星改性聚四氟乙烯衬底对地奎特和百草枯的集成采样和原位SERS检测。

提出了一种表面增强拉曼光谱（SERS）综合采样和原位检测空气和水中diquat （DQ）和百草枯（PQ）的方法。利用SERS指纹的独特特性以及多孔聚四氟乙烯（PTFE）膜的特殊吸附能力，我们合成了由多孔聚四氟乙烯和银纳米星（AgNSts）组成的复合衬底。利用AgNSts@PTFE过滤器，DQ和PQ可以用空气采样器采样，并使用便携式拉曼光谱仪有效地原位检测，无需预处理步骤。SERS强度与对数分析物浓度之间存在较强的相关性，R2值在0.937 ~ 0.968之间。DQ和PQ的检出限分别为0.74 ppb和0.23 ppb，均低于允许浓度。本研究提出了一种新的、快速的方法来检测非实验室环境下气溶胶中的DQ和PQ，为传统技术提供了一种替代方法。

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.