A new carbon nanomaterial solid-phase microextraction to pre-concentrate and extract pesticides in environmental water

Valenzuela, Eduard F.; Paula, Fabiano Gomes Ferreira de; Teixeira, Ana Paula C.; Menezes, Helvécio Costa; Cardeal, Zenilda de Lourdes

doi:10.1016/j.talanta.2020.121011

Cited by 40 publications

(8 citation statements)

References 43 publications

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“…The results of two series of experiments show that the lowest detection mass of our proposed sensors can reach 10 ng. Other detection methods have also been proposed in existing reports, such as fluorescence detection (30 μg/L), 41 gas chromatography coupled to mass spectrometry (41.3 ng/L), 42 and graphene metasurface devices (0.2 g/L). 43 In many applications of sensors, it is of particular importance to assess the reproducibility as well as the reliability.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Excitation of Surface Plasmon Resonance on Multiwalled Carbon Nanotube Metasurfaces for Pesticide Sensors

Wang

Cui

Zhang

et al. 2020

ACS Appl. Mater. Interfaces

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With the rapid advances in functional optoelectronics, the research on carbon-based materials and devices has become increasingly important at the terahertz frequency range owing to their advantages in terms of weight, cost, and freely bendable flexibility. Here, we report an effective material and device design for a terahertz plasmonic metasurface sensor (PMS) based on carbon nanotubes (CNTs). CNT metasurfaces based on silicon wafers have been prepared and obvious resonant transmission peaks are observed experimentally. The enhanced resonant peaks of transmission spectra are attributed to the surface plasmon polariton resonance, and the transmission peaks are further well explained by the Fano model. Furthermore, the different concentration gradients of pesticides (2,4-dichlorophenoxyacetic and chlorpyrifos solutions) have been detected by the designed PMSs, showing the lowest detection mass of 10 ng and the sensitivities of 1.38 × 10–2/ppm and 2.0 × 10–3/ppm, respectively. Good linear relationships between transmission amplitude and pesticide concentration and acceptable reliability and stability have been obtained. These materials and device strategies provide opportunities for novel terahertz functional devices such as sensors, detectors, and wearable terahertz imagers.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Excitation of Surface Plasmon Resonance on Multiwalled Carbon Nanotube Metasurfaces for Pesticide Sensors

Wang

Cui

Zhang

et al. 2020

ACS Appl. Mater. Interfaces

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“…Initially, the desorption modes (thermal desorption in solvent and direct desorption in the GC-MS injector) were evaluated. A CNM microextraction syringe manufactured by our research group was employed for the direct desorption test [30]. Once this parameter was defned, the solvent desorption modes (heating plate, ultrasound bath, and vortex agitation) were investigated.…”

Section: Optimization Of the Cnm Microextraction Methodmentioning

confidence: 99%

“…Te data related to the preparation and characterization of the CNM fbers were described previously [30,31], providing some carbon structure information. According to Raman spectroscopy experiments (Supplementary Material; Figure S1), G and D bands (1584 cm −1 and 1358 cm −1 , respectively) were observed in the sample spectrum.…”

Section: Preparation and Characterization Of Cnm Fibersmentioning

confidence: 99%

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Development of a Simple Integrative Carbon Nanomaterial Microextraction Method with GC-MS for Assessing Pesticide Residues in Apples

Valenzuela

André

Menezes

et al. 2023

Journal of Chemistry

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The present study describes an efficient analytical method for analyzing apple pesticide residues. This novel approach employs ultrasound-assisted cleaning (UAC), solid-phase microextraction (SPME), and gas chromatography/mass spectrometry (GC-MS). A fiber coating with carbon nanomaterials (CNMs) was used for the extraction process. The methodology underwent extraction process optimization and analytical method validation. Moreover, its applicability for detecting pesticides in apples was evaluated. The validation showed satisfactory results with linearity coefficients greater than 0.99 (R2 > 0.99) and linear working ranges from 0.5 ng·g−1 to 300.0 ng·g−1. The limits of detection and quantification (LODs and LOQs) ranged from 0.1 ng·g−1 to 0.3 ng·g−1 and from 0.5 ng·g−1 to 0.7 ng·g−1, respectively. The calculated recovery values ranged from 79% to 98%. The precision presented a relative standard deviation (RSD) lower than 14%. The validated method was applied to apple samples acquired from different markets and fruit stands in Belo Horizonte, Minas Gerais, Brazil. Organophosphate pesticides typically used in Brazilian apple production areas were detected in some samples. This study demonstrates the utility of UAC and CNM microextraction as an effective and highly efficient approach for analyzing pesticides in apples.

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“…6,9 Moreover the number of commercially available SPME fibers is limited. For these reasons, many new materials with good adsorption performance have been ceaselessly exploited as SPME fiber coatings, and the popular materials include metal organic frameworks, 10–12 covalent organic frameworks, 8,13–15 metal oxides, 16,17 carbon materials 18–20 and conductive polymers. 21–25…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid-functionalized poly-N-phenylpyrrole coated on a NiTi alloy substrate for highly efficient solid-phase microextraction

et al. 2022

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A new carbon nanomaterial solid-phase microextraction to pre-concentrate and extract pesticides in environmental water

Cited by 40 publications

References 43 publications

Excitation of Surface Plasmon Resonance on Multiwalled Carbon Nanotube Metasurfaces for Pesticide Sensors

Excitation of Surface Plasmon Resonance on Multiwalled Carbon Nanotube Metasurfaces for Pesticide Sensors

Development of a Simple Integrative Carbon Nanomaterial Microextraction Method with GC-MS for Assessing Pesticide Residues in Apples

Ionic liquid-functionalized poly-N-phenylpyrrole coated on a NiTi alloy substrate for highly efficient solid-phase microextraction

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