Application of magnetic nanomaterials in electroanalytical methods: A review

Ahmadi, Mazaher; Ghoorchian, Arash; Dashtian, Kheibar; Kamalabadi, Mahdie; Madrakian, Tayyebeh; Afkhami, Abbas

doi:10.1016/j.talanta.2020.121974

Cited by 47 publications

(20 citation statements)

References 335 publications

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“…Literature data report several examples of electrochemical aptasensors developed on magnetic microbeads or nanobeads mainly aimed at determining small molecules such as toxins, antibiotics, hormones, and pesticides for food safety applications. Recent review articles discuss important achievements in the development of MB-based electrochemical aptasensors for the detection of hazardous substances in food including allergenic or pathogenesis-related proteins [15][16][17][18][19]. In this context, a dual-aptamer-based sandwich assay was developed for electrochemical detection of Staphylococcus aureus; streptavidin-coated MBs were functionalized with a biotinylated anti-S. aureus aptamer and suspended in the sample in order to capture the bacterium through specific recognition of its specifically expressed protein [20].…”

Section: Magnetic Micro-and Nanobead-based Electrochemical Aptasensorsmentioning

confidence: 99%

“…Competitive apta-assays can also be engineered in which the fraction of the aptamer molecules bound to a target competitor displayed on the surface of MBs is amplified through nucleic acid amplification techniques and then detected by means of a specific fluorescence-based method [27]. This versatility in design has favored the development of a great variety of optical aptamer-based assays and technologies for the determination and quantification of specific food safety targets, including toxins, antibiotics, heavy metals, bacterial pathogens, and allergens [18,19,[28][29][30][31][32][33].…”

Section: Magnetic Micro-and Nanobead-based Optical Apta-assaysmentioning

confidence: 99%

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Aptamer-based assays: strategies in the use of aptamers conjugated to magnetic micro- and nanobeads as recognition elements in food control

et al. 2021

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An outlook on the current status of different strategies for magnetic micro- and nanosized bead functionalization with aptamers as prominent bioreceptors is given with a focus on electrochemical and optical apta-assays, as well as on aptamer-modified magnetic bead–based miniaturized extraction techniques in food control. Critical aspects that affect interaction of aptamers with target molecules, as well as the possible side effects caused by aptamer interaction with other molecules due to non-specific binding, are discussed. Challenges concerning the real potential and limitations of aptamers as bioreceptors when facing analytical problems in food control are addressed. Graphical abstract

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Section: Magnetic Micro-and Nanobead-based Electrochemical Aptasensorsmentioning

confidence: 99%

Section: Magnetic Micro-and Nanobead-based Optical Apta-assaysmentioning

confidence: 99%

Aptamer-based assays: strategies in the use of aptamers conjugated to magnetic micro- and nanobeads as recognition elements in food control

et al. 2021

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“…Such features include good dispersibility in solvents (facilitated by their size), high surface area, and possibility of functionalization/modification of their surface for improved specificity, range of sorbents, and/or adsorption efficiency, and ease of separation using an external magnet from complex matrices without the need for centrifugation or filtration steps [ 92 , 93 ]. The materials are also highly recyclable/reusable usually after appropriate rinsing, with analytes adsorbed by processes, such as sonication [ 92 , 94 ] use less amount of organic solvents and are often cost-effective [ 93 , 94 , 95 ].…”

Section: Nanomaterialsmentioning

confidence: 99%

Current Applications of Magnetic Nanomaterials for Extraction of Mycotoxins, Pesticides, and Pharmaceuticals in Food Commodities

2021

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Environmental pollutants, such as mycotoxins, pesticides, and pharmaceuticals, are a group of contaminates that occur naturally, while others are produced from anthropogenic sources. With increased research on the adverse ecological and human health effects of these pollutants, there is an increasing need to regularly monitor their levels in food and the environment in order to ensure food safety and public health. The application of magnetic nanomaterials in the analyses of these pollutants could be promising and offers numerous advantages relative to conventional techniques. Due to their ability for the selective adsorption, and ease of separation as a result of magnetic susceptibility, surface modification, stability, cost-effectiveness, availability, and biodegradability, these unique magnetic nanomaterials exhibit great achievement in the improvement of the extraction of different analytes in food. On the other hand, conventional methods involve longer extraction procedures and utilize large quantities of environmentally unfriendly organic solvents. This review centers its attention on current applications of magnetic nanomaterials and their modifications in the extraction of pollutants in food commodities.

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“…As técnicas eletroanalíticas podem ser definidas como uma classe de técnicas que detectam um analito, com base na medição de propriedades elétricas tais como potencial, corrente ou resistência elétrica, em uma célula eletroquímica contendo um eletrodo de referência, um eletrodo de trabalho e um eletrodo auxiliar (AHMADI et al, 2021;JALALVAND, GOICOECHEA e RUTLEDGE, 2016). São técnicas de detecção rápida, simples, precisas e econômicas, e em alguns casos, elas permitem medições na presença de compostos interferentes, o que não é possível com o emprego de outras técnicas analíticas (HOYOS-ARBELÁEZ, VÁZQUEZ e CONTRERAS-CALDERÓN, 2017).…”

Section: Técnicas Eletroanalíticasunclassified

“…Na VC o potencial é varrido de um potencial inicial a uma velocidade de varredura específica até um potencial reverso, em que o potencial é invertido, ou seja o potencial é varrido na direção oposta, retornando ao potencial inicial na mesma velocidade de varredura (AHMADI et al, 2021;ÁLVAREZ E ABEDUL, 2020). Vários ciclos podem ser executados.…”

Section: Técnicas Eletroanalíticas Para Determinação De Carbamatos E Ditiocarbamatosunclassified

Determinação eletroanalítica de pesticidas carbamatos e ditiocarbamatos

Almeida¹

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The use of pesticides, compounds that fight pests in agricultural practices, has increased added growth. Some pesticides are toxic chemical compounds, the number of cases of contamination of natural waters, soils and food by pesticide residues has also increased. The class of carbamates and the subclass of dithiocarbamates are used as pesticides, however indiscriminate use and above maximum limits can cause toxicity in humans and animals. The present work aimed to carry out a bibliographical survey showing analytical methodologies for the identification and quantification of pesticides of the carbamates class and the dithiocarbamates subclass, to identify as main electroanalytical techniques, to identify different types of materials used in the preparation of working electrodes and to discuss some applications specific, considering the identification of carbamates and dithiocarbamates in natural waters, soils, food and beverages. The study was developed through a literature review based on a systematic search in the scientific database "Science Direct" online. The perspective for an analytical determination of carbamates and dithiocarbamates pesticides when it comes to spectroscopic techniques is of little applicability due to the low selectivity of the technique. Referring to chromatographic techniques, good advantages due to the development of microcolumns, which allowed the use of modern chromatographic techniques. The use of electroanalytical techniques for the determination of carbamates and dithiocarbamate pesticides has positive perspectives and involves a variety of working electrode materials, which contribute to increased selectivity in the determination. Added to this is the favorable applicability of an association of separation techniques and detection techniques through an electrochemical detector for the determination of pesticides in general, an association in which solid amalgam electrodes show more promise. Keywords: Carbamates. Dithiocarbamates. Analytical techniques. Electroanalytical techniques. Electrodes. Não Reportado Aplicação pósemergente e como maturador em cultura de cana-de-açúcar Cultura de cana-deaçúcar Não permitido

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Application of magnetic nanomaterials in electroanalytical methods: A review

Cited by 47 publications

References 335 publications

Aptamer-based assays: strategies in the use of aptamers conjugated to magnetic micro- and nanobeads as recognition elements in food control

Aptamer-based assays: strategies in the use of aptamers conjugated to magnetic micro- and nanobeads as recognition elements in food control

Current Applications of Magnetic Nanomaterials for Extraction of Mycotoxins, Pesticides, and Pharmaceuticals in Food Commodities

Determinação eletroanalítica de pesticidas carbamatos e ditiocarbamatos

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