Amperometric immunosensor based on deposited gold nanocrystals/4,4′-thiobisbenzenethiol for determination of carbofuran

Sun, Xia; Zhu, Ying; Wang, Xiangyou

doi:10.1016/j.foodcont.2012.04.027

Cited by 34 publications

(17 citation statements)

References 37 publications

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“…Electrochemical biosensors constitute a valuable tool for achieving this goal as evidenced by the high number of affinity configurations developed so far. Some relevant examples have been summarized in Table 2 [74][75][76][77][78][79][80][81][82][83][84].…”

Section: Electrochemical Affinity Biosensors For Pesticidesmentioning

confidence: 99%

“…The method was applied to the determination of coumaphos in milk samples with good recoveries. application of the method to the analysis of lettuces, tomatoes, or strawberries among other samples [78]. and hybridization of the displacement complex to the ssDNA/ITO; (E) CV electrochemical detection.…”

Section: Electrochemical Affinity Biosensors For Pesticidesmentioning

confidence: 99%

“…Under the optimized conditions, a linear relationship between the relative change in DPV peak current and the logarithm of carbofuran solution was obtained in the 0.1 to 1.0-10 6 ng·mL −1 range, with a detection limit of 0.06 ng·mL −1 . These characteristics allowed the application of the method to the analysis of lettuces, tomatoes, or strawberries among other samples [78].…”

Section: Electrochemical Affinity Biosensors For Pesticidesmentioning

confidence: 99%

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Electrochemical Affinity Biosensors in Food Safety

2017

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Safety and quality are key issues of today's food industry. Since the food chain is becoming more and more complex, powerful analytical methods are required to verify the performance of food safety and quality systems. Indeed, such methods require high sensitivity, selectivity, ability for rapid implementation and capability of automatic screening. Electroanalytical chemistry has, for decades, played a relevant role in food safety and quality assessment, taking more and more significance over time in the solution of analytical problems. At present, the implementation of electrochemical methods in the food is evident. This is in a large part due to the relevant results obtained by combining the attractive advantages of electrochemical transduction strategies (in terms of relatively simple hardware, versatility, interface with automatic logging and feasibility of application outside the laboratory environment) with those from biosensors technology. Important examples of enzyme electrochemical biosensors are those dedicated to the determination of glucose, alcohol or cholesterol are important examples. In addition, other types of different electrochemical biosensing approaches have emerged strongly in the last years. Among these, the strategies involving affinity interactions have been shown to possess a large number of applications. Therefore, electrochemical immunosensors and DNA-based biosensors have been widely used to determine major and minor components in foodstuffs, providing sufficient data to evaluate food freshness, the quality of raw materials, or the origin of samples, as well as to determine a variety of compounds at trace levels related to food safety such as micotoxins, allergens, drugs residues or pathogen microorganisms. This review discusses some critical examples of the latest advances in this area, pointing out relevant methodologies related to the measurement techniques, including the use of nanostructured electrodes and strategies for signal amplification.

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Section: Electrochemical Affinity Biosensors For Pesticidesmentioning

confidence: 99%

Section: Electrochemical Affinity Biosensors For Pesticidesmentioning

confidence: 99%

Section: Electrochemical Affinity Biosensors For Pesticidesmentioning

confidence: 99%

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Electrochemical Affinity Biosensors in Food Safety

2017

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“…1 It is one of the most toxic carbamate pesticides and is dissolved easily in water. Its high toxicity and solubility causes accumulation in living organisms and further brings serious harm to human health and life safety.…”

Section: Introductionmentioning

confidence: 99%

Development and Applications of Quantum Dot-based Molecularly Imprinted Polymer Composites for Optosensing of Carbofuran in Water

et al. 2017

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23Chen et al. fabricated and successfully utilized MIP-coated QDs for cyphenothrin detection in river water. 24 However, in these methods the value of fluorescence they collected were all by fluorescence spectrophotometry, which only supplies the fluorescence information of samples illuminated by the light source of the instrument. In addition, the polymers of each sample could not keep the same dispersion state, which resulted in inaccuracies in the detected fluorescence data. So a more effective method was needed.As a new analytical technique, cytometric bead array (CBA) has achieved real-time and rapid detection of targeted 2017 © The Japan Society for Analytical Chemistry † To whom correspondence should be addressed. In this paper, quantum dot (QD)-based molecularly imprinted polymer (MIP) was fabricated and successfully utilized as a fluorescent probe for highly selective and sensitive detection of carbofuran in water samples. The MIPs were synthesized followed by a multi-step swelling and polymerization method, and then labeled with CdSe/ZnS QDs via gradual solvent evaporation. Then the prepared QDs-MIP microspheres were introduced to flow cytometry by virtue of their good dispersibility in water, and fast adsorption and desorption. Under optimized conditions, the fluorescence intensity of QDs-MIP decreased linearly with the increasing of carbofuran in the concentration range of 1 -20 μg L -1 (R 2 > 0.99) and it can detect down to 0.2 μg L -1 of carbofuran. This method was simple, selective and applied successfully to the optosensing of trace carbofuran in water samples with good recoveries ranging from 94.1 ± 3.7 to 98.4 ± 4.5%.

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“…También se reporta que es teratogénico, genotóxico, mutagénico y afecta a los embriones (Cohen et al 1994;Gera et al 2011). Debido a su gran toxicidad y aplicabilidad se reportan varios métodos de cuantificación de sus residuos, dentro de los que están la espectrofotometría UV-Vis (Tamrakar et al 2007), la cromatografía líquida de alto rendimiento (Tennakoon et al 2009;Otieno et al 2010;Bermúdez et al 2011), la cromatografía de gases (Petropoulou et al 2006), la fluorimetría (Pacioni y Veglia 2003), los sensores amperométricos (Sun et al 2012) y la cromatografía de gases acoplada a espectrometría de masas (Bravo et al 2005;Tennakoon et al 2009;Otieno et al 2010). …”

Section: Introductionunclassified

Cuantificación voltamétrica de carbofurano en papa (Solanum tuberosum L., Solanaceae)

Lara-Sandoval

Acuña

2017

Corpoica Cienc. Tecnol. Agropecuaria

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Sanidad vegetal y protección de cultivosCuantificación voltamétrica de carbofurano en papa (Solanum tuberosum L., Solanaceae)Voltammetric quantification of Carbofuran in potato (Solanum tuberosum L., Solanaceae)Quantificação voltamétrica de carbofurano em batata (Solanum tuberosum L., Solanaceae) Artículo de investigación científica y tecnológicaAdriana Elizabeth Lara-Sandoval,1 Sandra Patricia Chaparro-Acuña2 ResumenEl exceso en la aplicación de plaguicidas puede generar acumulaciones en los tubérculos de papa que sobrepasen el límite máximo residual (LMR) presentado por el Codex Alimentarius, lo cual representa riesgos para la salud de los consumidores. La cuantificación de plaguicidas es un proceso costoso y de difícil acceso para los cultivadores y entes de salud y de vigilancia. En este artículo se presenta una metodología sencilla, económica y asequible para la cuantificación de carbofurano en tubérculos. El método de voltametría diferencial de pulso (DPV) para carbofurano fue validado para su cuantificación en papa. El estudio fue realizado usando como electrolito de soporte la solución bufferPalabras clave: electroquímica, insecticidas, productos agrícolas, Solanum tuberosum Britton-Robinson, un electrodo de trabajo de carbón vítreo, Ag/AgCl como electrodo de referencia y platino como electrodo auxiliar. El insecticida en papa fue extraído por reparto sólido-líquido y los resultados obtenidos fueron contrastados por espectroscopía UV-Vis, lo cual permitió deducir que el método voltamétrico genera resultados satisfactorios, precisos y confiables para la cuantificación de carbofurano en muestras de este tubérculo. Estos resultados son una evidencia del uso de carbofurano en el municipio de Ventaquemada (Boyacá). Este método de detección de carbofurano puede utilizarse como una herramienta para monitorear el uso de estos compuestos químicos en la papa. 275-284

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Amperometric immunosensor based on deposited gold nanocrystals/4,4′-thiobisbenzenethiol for determination of carbofuran

Cited by 34 publications

References 37 publications

Electrochemical Affinity Biosensors in Food Safety

Electrochemical Affinity Biosensors in Food Safety

Development and Applications of Quantum Dot-based Molecularly Imprinted Polymer Composites for Optosensing of Carbofuran in Water

Cuantificación voltamétrica de carbofurano en papa (Solanum tuberosum L., Solanaceae)

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