Magnetic restricted-access carbon nanotubes for the extraction/pre-concentration of organophosphates from food samples followed by spectrophotometric determination

Frugeri, Pedro Marcos; Cavalcanti, Marcello Henrique da Silva; Lago, Ayla Campos do; Figueiredo, Eduardo Costa; Tarley, César Ricardo Teixeira; Wisniewski, Célio; Luccas, Pedro Orival

doi:10.1016/j.saa.2020.118632

Cited by 16 publications

(4 citation statements)

References 35 publications

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“…Based on the relevant ability of RACNTs to exclude proteins, as well as the advantages of working with magnetic particles in d-SPE, in 2020, our research group incorporated magnetite nanoparticles into RACNTs, resulting in magnetic restricted access carbon nanotubes (M-RACNTs) (Frugeri et al 2020). This new material was successful used to extract organophosphates from milk samples.…”

Section: Introductionmentioning

confidence: 99%

Determination of Lead and Cadmium in Non-mineralized Raw Milk Samples Employing Extraction with Magnetic Restricted Access Carbon Nanotubes Followed by FAAS Analysis

et al. 2023

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Lead and cadmium were determined in non-mineralized raw milk samples employing dispersive solid phase extraction with magnetic restricted access carbon nanotubes (M-RACNTs), followed by ame atomic absorption spectrometry analysis. M-RACNTs were obtained by modifying carbon nanotubes (CNTs) with magnetite nanoparticles and then covering with a chemically crosslinked bovine serum albumin (BSA) external layer. The M-RACNTs particles were very e cient to capture the metals and exclude proteins from the milk, being easily separated from the sample using a neodymium magnet. The extraction parameters were appraised by multivariate optimization (factorial design and Doehlert matrix). The method was validated and proved to be robust for small variations, simple, fast, sensitive and selective. The determination coe cient and limit of quanti cation were 0.998 and 10 µg L -1 , respectively, for both Pb 2+ and Cd 2+ ions. The developed method was able to determine both metals in concentrations below the maximum residue limits (20 and 50 µg L -1 for Pb 2+ and Cd + , respectively, in Brazil), demonstrating that M-RACNTs are promising materials for metal extraction in protein-rich samples, without the need for mineralization procedures.Recently, the use of smart sorbents to extract metals from complex samples has increased, mainly due to the simplicity and security of this procedure. Carbon nanotubes (CNTs) can be an important sorbent in this case, due to their high adsorptive capacity (Herbst et al. 2004;Barbosa et al. 2015). However, the use of commercial CNTs is limited in the preparation of biological samples, given that proteins can bind to the

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Section: Introductionmentioning

confidence: 99%

Determination of Lead and Cadmium in Non-mineralized Raw Milk Samples Employing Extraction with Magnetic Restricted Access Carbon Nanotubes Followed by FAAS Analysis

et al. 2023

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“…In order to ensure food safety, checking the compliance of OPPs has become a mandatory requirement before the market access and trading of agricultural products in many countries . Thereby, increasing efforts have been made to develop a sensitive and reliable method for monitoring OPPs in foodstuffs over the last few decades, such as gas chromatography coupled with mass spectrometry, liquid chromatography coupled with tandem mass spectrometry, capillary electrophoreses, spectrophotometry, and spectrofluorimetry . Although the above-mentioned detection techniques could sensitively detect analytes in complex matrices, their major limitations are the heavy dependence on expensive equipment, complex laboratory procedures, large amounts of organic solvents, and highly skilled personnel .…”

Section: Introductionmentioning

confidence: 99%

“UV-Driven Self-Cleaning” Magnetic Molecularly Imprinted Absorbents Coupled with LTP-MS and LC-TQ-MS for Rapid High-Throughput Screening and Quantification of Organophosphorus Pesticides in Agro-products

Wang

Zhang

et al. 2023

J. Agric. Food Chem.

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Organophosphorus magnetic molecularly imprinted polymers (OMMIPs) with high adsorption capacities (13.5–83.8 mg g–1) and good applicability were developed for efficient extraction and pre-concentration of multiple organophosphorus pesticides (OPPs) from foodstuffs. The OMMIP-based sample pretreatment coupled with low-temperature plasma ambient ionization mass spectrometry achieved rapid screening for 90 kinds of pesticides at default maximum residue limits of National Standard (GB 2763-2021) in nine types of agro-products. The OMMIP-based liquid chromatography coupled with triple quadrupole mass spectroscopy assay demonstrated rapid magneto-actuated isolation, efficient removal of matrix interference, and reduced signal suppression, resulting in a short detection time (30 min), compliant recoveries (60.1–127.5%), low detection limits (0.0001–0.073 μg g–1), and simultaneous quantification of multi-pesticides. The yolk–shell-structured OMMIPs (Fe3O4@mTiO2@MIPs) demonstrated additional benefits of excellent ultraviolet light-driven catalytic degradation activity toward OPPs, making them eco-friendly for self-cleaning regeneration and reducing laboratory pesticide discharge. This work highlights the potential of OMMIPs for high-throughput and in situ pesticide monitoring in modern large-scale agricultural markets.

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“…Sometimes pesticide residues are inevitable; however, once the residue reaches its limitation, it can make a series of danger to humans and animals or other organism in the ecological system by the food cycle 4 . The organophosphate pesticides (OPPs) were widely used and leaded to the repeated incidents of poisoning, and therefore, self-poisoning with organophosphate pesticides is a signi cant global health problem [5][6][7] . Hence, a ban was imposed on the use of toxic pesticides, including OPPs, such as methamidophos, parathion, monocrotophos, methyl parathion, etc [8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Study of Analytical Methods for Determining 16 Organophosphorus Pesticide Residues in Panax Notoginseng and Aucklandia Lappa Decne by Automated Solid-Phase Extraction System and GC/MS

Gou

Ruan

et al. 2021

Preprint

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A fast and sensitive multi-residue analytical method was developed for the determination of organophosphorus pesticide residues in Panax notoginseng and Aucklandia lappa decne by comparing an ultrasonic extraction and homogenate extraction approach coupled with automated solid-phase extraction system and gas chromatography-mass spectrometry (GC/MS). Various factors affecting the homogenate extraction and purification efficiency were investigated in detail. The optimum conditions for homogenate extraction of organophosphorus pesticide residues from Panax notoginseng and Aucklandia lappa decne were 60 mL dichloromethane, 10000 r/min of extracting revolution speed and 2 min of extracting time. The extracts were cleaned up by automated solid-phase extraction system and determined by GC/MS. Under the optimum conditions, the results of the homogenate extraction approach were compared with those of the ultrasonic extraction, and the homogenate extraction approach was used to extract the samples. The average recoveries of the method by a homogenate extraction approach coupled with automated solid-phase extraction system and GC/MS ranged from 72.56% to 96.70%, and RSDs were 0.05~0.14%, which allowed the determination of 16 organophosphorus pesticide residues in Panax notoginseng and Aucklandia lappa decne. The results indicated that the proposed method can apply for the determination of organophosphate pesticides residues in Panax notoginseng and Aucklandia lappa decne with high accuracy and precision.

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Magnetic restricted-access carbon nanotubes for the extraction/pre-concentration of organophosphates from food samples followed by spectrophotometric determination

Cited by 16 publications

References 35 publications

Determination of Lead and Cadmium in Non-mineralized Raw Milk Samples Employing Extraction with Magnetic Restricted Access Carbon Nanotubes Followed by FAAS Analysis

Determination of Lead and Cadmium in Non-mineralized Raw Milk Samples Employing Extraction with Magnetic Restricted Access Carbon Nanotubes Followed by FAAS Analysis

“UV-Driven Self-Cleaning” Magnetic Molecularly Imprinted Absorbents Coupled with LTP-MS and LC-TQ-MS for Rapid High-Throughput Screening and Quantification of Organophosphorus Pesticides in Agro-products

Study of Analytical Methods for Determining 16 Organophosphorus Pesticide Residues in Panax Notoginseng and Aucklandia Lappa Decne by Automated Solid-Phase Extraction System and GC/MS

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Magnetic restricted-access carbon nanotubes for the extraction/pre-concentration of organophosphates from food samples followed by spectrophotometric determination

Cited by 16 publications

References 35 publications

Determination of Lead and Cadmium in Non-mineralized Raw Milk Samples Employing Extraction with Magnetic Restricted Access Carbon Nanotubes Followed by FAAS Analysis

Determination of Lead and Cadmium in Non-mineralized Raw Milk Samples Employing Extraction with Magnetic Restricted Access Carbon Nanotubes Followed by FAAS Analysis

“UV-Driven Self-Cleaning” Magnetic Molecularly Imprinted Absorbents Coupled with LTP-MS and LC-TQ-MS for Rapid High-Throughput Screening and Quantification of Organophosphorus Pesticides in Agro-products

Study of Analytical Methods for Determining 16 Organophosphorus Pesticide Residues in Panax Notoginseng and Aucklandia&nbsp;Lappa Decne by Automated Solid-Phase Extraction System and GC/MS

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Study of Analytical Methods for Determining 16 Organophosphorus Pesticide Residues in Panax Notoginseng and Aucklandia Lappa Decne by Automated Solid-Phase Extraction System and GC/MS