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Riberi WI, Zon MA, Fernández H, Arévalo FJ. Optimization of a nanostructured surface for the development of electrochemical immunosensors. J Electroanal Chem (Lausanne) 2019. [DOI: 10.1016/j.jelechem.2019.01.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Di Tocco A, Porcal GV, Riberi WI, Zon MA, Fernández H, Robledo SN, Arévalo FJ. Synthesis of stable CdS nanocrystals using experimental design: optimization of the emission. NEW J CHEM 2019. [DOI: 10.1039/c9nj02145k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
This work investigates CdS nanocrystal synthesis by applying chemometric tools. Very good reproducibility of nanocrystals of CdS was obtained.
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Affiliation(s)
- Aylén Di Tocco
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - Gabriela Valeria Porcal
- Grupo de Fotoquímica
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - Walter Iván Riberi
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - María Alicia Zon
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - Héctor Fernández
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
| | - Sebastian Noel Robledo
- Grupo de Electroanalítica (GEANA)
- Departamento de Tecnología Química
- Facultad de Ingeniería
- Universidad Nacional de Río Cuarto
- Instituto para el desarrollo agroindustrial y de la salud (IDAS)
| | - Fernando Javier Arévalo
- Grupo de Electroanalítica (GEANA)
- Departamento de Química
- Facultad de Ciencias Exactas
- Físico-Químicas y Naturales
- Universidad Nacional de Río Cuarto
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Hoyos-Arbeláez J, Ramírez García G, Arévalo FJ, Vázquez M, Fernández H, Gutiérrez Granados S. Electrochemical determination of mangiferin using glassy carbon electrodes modified with carbonaceous nanomaterials. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2017.11.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Viviana Tarditto L, Alicia Zon M, García Ovando H, Roberto Vettorazzi N, Javier Arévalo F, Fernández H. Electrochemical magneto immunosensor based on endogenous β-galactosidase enzyme to determine enterotoxicogenic Escherichia coli F4 (K88) in swine feces using square wave voltammetry. Talanta 2017; 174:507-513. [DOI: 10.1016/j.talanta.2017.06.059] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 06/19/2017] [Accepted: 06/20/2017] [Indexed: 12/12/2022]
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Tarditto LV, Arévalo FJ, Zon MA, Ovando HG, Vettorazzi NR, Fernández H. Electrochemical sensor for the determination of enterotoxigenic Escherichia coli in swine feces using glassy carbon electrodes modified with multi-walled carbon nanotubes. Microchem J 2016. [DOI: 10.1016/j.microc.2016.03.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Díaz Toro PC, Arévalo FJ, Zon MA, Fernández H. Studies of the electrochemical behavior of moniliformin mycotoxin and its sensitive determination at pretreated glassy carbon electrodes in a non-aqueous medium. J Electroanal Chem (Lausanne) 2015. [DOI: 10.1016/j.jelechem.2014.11.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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González-Techera A, Zon MA, Molina PG, Fernández H, González-Sapienza G, Arévalo FJ. Development of a highly sensitive noncompetitive electrochemical immunosensor for the detection of atrazine by phage anti-immunocomplex assay. Biosens Bioelectron 2014; 64:650-6. [PMID: 25441414 DOI: 10.1016/j.bios.2014.09.046] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 09/17/2014] [Accepted: 09/20/2014] [Indexed: 10/24/2022]
Abstract
The development of immunosensors for the detection of small molecules is of great interest because of their simplicity, high sensitivity and extended analytical range. Due to their size, small compounds cannot be simultaneously recognized by two antibodies impeding their detection by noncompetitive two-site immunoassays, which are superior to competitive ones in terms of sensitivity, kinetics, and working range. In this work, we combine the advantages of magneto-electrochemical immunosensors with the improved sensitivity and direct proportional signal of noncompetitive immunoassays to develop a new Phage Anti-Immunocomplex Electrochemical Immunosensor (PhAIEI) for the detection of the herbicide atrazine. The noncompetitive assay is based on the use of recombinant M13 phage particles bearing a peptide that specifically recognizes the immunocomplex of atrazine with an anti-atrazine monoclonal antibody. The PhAIEI performed with a limit of detection (LOD) of 0.2 pg mL(-1), which is 200-fold better than the LOD obtained using the same antibody in an optimized conventional competitive ELISA, with a large increase in working range. The developed PhAIEI was successfully used to assay undiluted river water samples with no pretreatment and excellent recoveries. Apart from the first demonstration of the benefits of integrating phage anti-immunocomplex particles into electrochemical immunosensors, the extremely low and environmentally relevant detection limits of atrazine attained with the PhAIEIS may have direct applicability to fast and sensitive detection of this herbicide in the environment.
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Affiliation(s)
- Andrés González-Techera
- Cátedra de Inmunología, Facultad de Química, Instituto de Higiene, UDELAR, Av. A. Navarro 3051, piso 2, Montevideo 11600, Uruguay
| | - María Alicia Zon
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3. (5800) - Río Cuarto, Argentina
| | - Patricia Gabriela Molina
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3. (5800) - Río Cuarto, Argentina
| | - Héctor Fernández
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3. (5800) - Río Cuarto, Argentina
| | - Gualberto González-Sapienza
- Cátedra de Inmunología, Facultad de Química, Instituto de Higiene, UDELAR, Av. A. Navarro 3051, piso 2, Montevideo 11600, Uruguay.
| | - Fernando Javier Arévalo
- Grupo de Electroanalítica (GEANA), Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal N° 3. (5800) - Río Cuarto, Argentina.
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Arévalo FJ, González-Techera A, Zon MA, González-Sapienza G, Fernández H. Ultra-sensitive electrochemical immunosensor using analyte peptidomimetics selected from phage display peptide libraries. Biosens Bioelectron 2012; 32:231-7. [DOI: 10.1016/j.bios.2011.12.019] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2011] [Revised: 12/08/2011] [Accepted: 12/13/2011] [Indexed: 11/27/2022]
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Perrotta PR, Vettorazzi NR, Arévalo FJ, Granero AM, Chulze SN, Zón MA, Fernández H. Electrochemical Studies of Ochratoxin A Mycotoxin at Gold Electrodes Modified with Cysteamine Self-Assembled Monolayers. Its Ultrasensitive Quantification in Red Wine Samples. ELECTROANAL 2011. [DOI: 10.1002/elan.201100094] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Arévalo FJ, Granero AM, Fernández H, Raba J, Zón MA. Citrinin (CIT) determination in rice samples using a micro fluidic electrochemical immunosensor. Talanta 2010; 83:966-73. [PMID: 21147345 DOI: 10.1016/j.talanta.2010.11.007] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2010] [Revised: 10/29/2010] [Accepted: 11/01/2010] [Indexed: 10/18/2022]
Abstract
The development of an electrochemical immunosensor incorporated in a micro fluidic cell for quantification of citrinin (CIT) mycotoxin in rice samples is described for the first time. Both CIT present in rice samples and immobilized on a gold surface electrodeposited on a glassy carbon (GC) electrode modified with a cysteamine self-assembled monolayer were allowed to compete for the monoclonal mouse anti-CIT IgG antibody (mAb-CIT) present in solution. Then, an excess of rabbit anti mouse IgG (H+L) labelled with the horseradish peroxidase (secAb-HRP) was added, which reacts with the mAb-CIT which is in the immuno-complex formed with the immobilized CIT on the electrode surface. The HPR, in the presence of hydrogen peroxide (H(2)O(2)) catalyzes the oxidation of catechol (H(2)Q) whose back electrochemical reduction was detected on a GC electrode at -0.15 V vs Ag/AgCl by amperometric measurements. The current measured is proportional to the enzymatic activity and inversely proportional to the amount of CIT present in the rice samples. This immunosensor for CIT showed a range of work between 0.5 and 50 ng mL(-1). The detection (LOD) and the quantification (LOQ) limits were 0.1 and 0.5 ng mL(-1), respectively. The coefficients of variation intra- and inter-assays were less than 6%. The electrochemical detection could be done within 2 min and the assay total time was 45 min. The immunosensor was provided to undertake at least 80 determinations for different samples with a minimum previous pre-treatment. Our electrochemical immunosensor showed a higher sensitivity and reduced analysis time compared to other analytical methods such as chromatographic methods. This methodology is fast, selective and very sensitive. Thus, the immunosensor showed to be a very useful tool to determine CIT in samples of cereals, mainly rice samples.
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Affiliation(s)
- Fernando Javier Arévalo
- Departamento de Química, Facultad de Ciencias Exactas, Físico-Químicas y Naturales, Universidad Nacional de Río Cuarto, Agencia Postal No 3, (5800)-Río Cuarto, Argentina
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Arévalo FJ, Messina GA, Molina PG, Zón MA, Raba J, Fernández H. Determination of progesterone (P4) from bovine serum samples using a microfluidic immunosensor system. Talanta 2010; 80:1986-92. [DOI: 10.1016/j.talanta.2009.10.059] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2009] [Revised: 10/22/2009] [Accepted: 10/23/2009] [Indexed: 12/01/2022]
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Arévalo FJ, Molina PG, Zón MA, Fernández H. Studies about the adsorption of progesterone (P4) at glassy carbon electrodes in aqueous buffer solution by square wave voltammetry. J Electroanal Chem (Lausanne) 2009. [DOI: 10.1016/j.jelechem.2009.02.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Arévalo FJ, Molina PG, Zón MA, Fernández H. Novel studies about the electrochemical reduction of progesterone (P4) in acetonitrile at glassy carbon electrodes. J Electroanal Chem (Lausanne) 2008. [DOI: 10.1016/j.jelechem.2008.03.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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