Plasmonic Optical Fiber Sensors and Molecularly Imprinted Polymers for Glyphosate Detection at an Ultra-Wide Range

被引：1

作者：

Renzullo, Luca Pasquale ^{[1
]}

Tavoletta, Ines ^{[1
]}

Alberti, Giancarla ^{[2
]}

Zeni, Luigi ^{[1
]}

Pesavento, Maria ^{[2
]}

Cennamo, Nunzio ^{[1
]}

机构：

[1] Univ Campania Luigi Vanvitelli, Dept Engn, Via Roma 29, I-81031 Aversa, Italy

[2] Univ Pavia, Dept Chem, Via Taramelli 12, I-27100 Pavia, Italy

来源：

CHEMOSENSORS | 2024年 / 12卷 / 07期

关键词：

molecularly imprinted polymers (MIPs); plastic optical fibers (POFs); surface plasmon resonance (SPR); glyphosate (GLY); optical fiber sensors; chemical sensors; AMINOMETHYLPHOSPHONIC ACID; WATER; BIOSENSOR; RESIDUES; ION; SPR; TEA;

D O I：

10.3390/chemosensors12070142

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

In this study, a surface plasmon resonance (SPR) sensor based on modified plastic optical fibers (POFs) was combined with a specific molecularly imprinted polymer (MIP), used as a synthetic receptor, for glyphosate (GLY) determination in aqueous solutions. Since GLY is a non-selective herbicide associated with severe environmental and health problems, detecting glyphosate in environmental and biological samples remains challenging. The selective interaction between the MIP layer and GLY is monitored by exploiting the SPR phenomenon at the POF's gold surface. Experimental results show that in about ten minutes and by dropping microliter volume samples, the presented optical-chemical sensor can quantify up to three orders of magnitude of GLY concentrations, from nanomolar to micromolar, due to a thin MIP layer over the SPR surface. The developed optical-chemical sensor presents a detection limit of about 1 nM and can be used for onsite GLY measurements. Moreover, the experimental analysis demonstrated the high selectivity of the proposed POF-based chemical sensor.

引用

页数：13