Fast, sensitive and selective simultaneous determination of paraquat and glyphosate herbicides in water samples using a compact electrochemical sensor

Thimoonnee, Suphatsorn; Somnet, Kanpitcha; Ngaosri, Pattanun; Chairam, Sanoe; Karuwan, Chanpen; Kamsong, Wichayaporn; Tuantranont, Adisorn; Amatatongchai, Maliwan

doi:10.1039/d1ay02201f

Cited by 13 publications

(8 citation statements)

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“…This result confirms that GQDs-AuNPs@dual-MIP spheres are electrocatalytically active and highly affine to 4-NQO. This observation is in line with previous reports. ,, …”

Section: Methodssupporting

confidence: 94%

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Facile and Compact Electrochemical Paper-Based Analytical Device for Point-of-Care Diagnostic of Dual Carcinogen Oxidative Stress Biomarkers through a Molecularly Imprinted Polymer Coated on Graphene Quantum-Dot Capped Gold

et al. 2022

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Nanoscale imprinting significantly increases the specific surface area and recognition capabilities of a molecularly imprinted polymer by improving accessibility to analytes, binding kinetics, and template removal. Herein, we present a novel synthetic route for a dual molecularly imprinted polymer (dual-MIP) of the carcinogen oxidative stress biomarkers 3-nitrotyrosine (3-NT) and 4-nitroquinolin-N-oxide (4-NQO) as coatings on graphene quantum-dot capped gold nanoparticles (GQDs-AuNPs). The dual-MIP was successfully coated on the GQDs-AuNPs core via a (3-mercaptopropyl) trimethoxysilane (MPTMS) linkage and copolymerization with the 3-aminopropyltriethoxysilane (APTMS) functional monomer. In addition, we fabricated a facile and compact three-dimensional electrochemical paper-based analytical device (3D-ePAD) for the simultaneous determination of the dual biomarkers using a GQDs-AuNPs@dual-MIP-modified graphene electrode (GQDs-AuNPs@dual-MIP/SPGE). The developed dual-MIP device provides greatly enhanced electrochemical signal amplification due to the improved electrode-specific surface area, electrocatalytic activity, and the inclusion of large numbers of dual-imprinted sites for 3-NT and 4-NQO detection. Quantitative analysis used square wave voltammetry, with an oxidation current appearing at −0.10 V for 4-NQO and +0.78 V for 3-NT. The dual-MIP sensor revealed excellent linear dynamic ranges of 0.01 to 500 μM for 3-NT and 0.005 to 250 μM for 4-NQO, with detection limits in nanomolar levels for both biomarkers. Furthermore, the dual-MIP sensor for the simultaneous determination of 3-NT and 4-NQO provides high accuracy and precision, with no evidence of interference from urine, serum, or whole blood samples.

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“…This result confirms that GQDs-AuNPs@dual-MIP spheres are electrocatalytically active and highly affine to 4-NQO. This observation is in line with previous reports. ,, …”

Section: Methodssupporting

confidence: 94%

“…This observation is in line with previous reports. 22,31,39 Optimization of Polymerization Conditions. As illustrated in Scheme 1, we encapsulated the GQDs-AuNPs core in SiO 2 via binding MPTMS via its thiol groups to the gold during the one-step shell-growth method.…”

Section: ■ Introductionmentioning

confidence: 99%

Facile and Compact Electrochemical Paper-Based Analytical Device for Point-of-Care Diagnostic of Dual Carcinogen Oxidative Stress Biomarkers through a Molecularly Imprinted Polymer Coated on Graphene Quantum-Dot Capped Gold

et al. 2022

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“…Under the optimal conditions, Pb 2+ incubation concentrations were progressively increased from 0 to 9 μM. Under the DPV detection, 34 we observed an oxidation peak of MB at −0.22 V, while a strong oxidation peak of Fc was observed near 0.2 V. Of course, the oxidation peaks of lead and oxygen can also be detected under DPV detection. Still, they were far from the target signal peak.…”

Section: Resultsmentioning

confidence: 60%

A ratiometric electrochemical sensor for detecting lead in fish based on the synergy of semi-complementary aptamer pairs and Ag nanowires@zeolitic imidazolate framework-8

et al. 2023

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“…A dual-MIP was fabricated by 3D-printing on the surface of mesoporous SiPtNPs, using acrylic acid and N -vinyl-2-pyrrolidone as functional monomers, and N , N ′-(1,2-dihydroxyethylene) bis(acrylamide) (DHEBA) as the cross-linking monomer. The sensors allowed for simultaneous determination of both herbicides, paraquat, and GLP, in water samples in the LDCR of 0.025–500 μM and with the LOD of 3.1 nM and 4 nM, respectively …”

Section: Sensors and Separation Systems For Glp Determinationmentioning

confidence: 99%

“…102 Furthermore, in a recent study, a gold chip/electrode coated with a self-assembled monolayer of GLP, in water samples in the LDCR of 0.025−500 μM and with the LOD of 3.1 nM and 4 nM, respectively. 144 A typical base-catalyzed sol−gel transition incorporation was performed to incorporate GLP and graphene QD labels into mesoporous organosilica MIPs. The GLP-induced quenchingmediated detection enabled GLP quantification at a subnanomolar level (0.017 ppb, 17 pg/mL).…”

Section: Electrochemical Sensors For Glpmentioning

confidence: 99%

Glyphosate Separating and Sensing for Precision Agriculture and Environmental Protection in the Era of Smart Materials

Mazuryk

Klepacka

Kutner

et al. 2023

Environ. Sci. Technol.

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The present article critically and comprehensively reviews the most recent reports on smart sensors for determining glyphosate (GLP), an active agent of GLP-based herbicides (GBHs) traditionally used in agriculture over the past decades. Commercialized in 1974, GBHs have now reached 350 million hectares of crops in over 140 countries with an annual turnover of 11 billion USD worldwide. However, rolling exploitation of GLP and GBHs in the last decades has led to environmental pollution, animal intoxication, bacterial resistance, and sustained occupational exposure of the herbicide of farm and companies' workers. Intoxication with these herbicides dysregulates the microbiomegut-brain axis, cholinergic neurotransmission, and endocrine system, causing paralytic ileus, hyperkalemia, oliguria, pulmonary edema, and cardiogenic shock. Precision agriculture, i.e., an (information technology)-enhanced approach to crop management, including a site-specific determination of agrochemicals, derives from the benefits of smart materials (SMs), data science, and nanosensors. Those typically feature fluorescent molecularly imprinted polymers or immunochemical aptamer artificial receptors integrated with electrochemical transducers. Fabricated as portable or wearable lab-on-chips, smartphones, and soft robotics and connected with SM-based devices that provide machine learning algorithms and online databases, they integrate, process, analyze, and interpret massive amounts of spatiotemporal data in a user-friendly and decision-making manner. Exploited for the ultrasensitive determination of toxins, including GLP, they will become practical tools in farmlands and point-of-care testing. Expectedly, smart sensors can be used for personalized diagnostics, real-time water, food, soil, and air quality monitoring, site-specific herbicide management, and crop control.

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Fast, sensitive and selective simultaneous determination of paraquat and glyphosate herbicides in water samples using a compact electrochemical sensor

Abstract: We report a new ready-to-use sensor for simultaneous determination of paraquat (PQ) and glyphosate (GLY) based on a graphite screen-printed electrode modified with a dual-molecularly imprinted polymer coated on a mesoporous silica-platinum core.

Cited by 13 publications

References 50 publications

Facile and Compact Electrochemical Paper-Based Analytical Device for Point-of-Care Diagnostic of Dual Carcinogen Oxidative Stress Biomarkers through a Molecularly Imprinted Polymer Coated on Graphene Quantum-Dot Capped Gold

Facile and Compact Electrochemical Paper-Based Analytical Device for Point-of-Care Diagnostic of Dual Carcinogen Oxidative Stress Biomarkers through a Molecularly Imprinted Polymer Coated on Graphene Quantum-Dot Capped Gold

A ratiometric electrochemical sensor for detecting lead in fish based on the synergy of semi-complementary aptamer pairs and Ag nanowires@zeolitic imidazolate framework-8

Glyphosate Separating and Sensing for Precision Agriculture and Environmental Protection in the Era of Smart Materials

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