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Giancarla A, Zanoni C, Merli D, Magnaghi LR, Biesuz R. A new cysteamine-copper chemically modified screen-printed gold electrode for glyphosate determination. Talanta 2024; 269:125436. [PMID: 38008026 DOI: 10.1016/j.talanta.2023.125436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2023] [Revised: 11/07/2023] [Accepted: 11/17/2023] [Indexed: 11/28/2023]
Abstract
A chemically modified screen-printed gold electrode has been prepared by covering the electrode surface with a cysteamine-copper self-assembled monolayer (SAM). The sensor was effective for the voltammetric sensing of glyphosate. The method exploits the interaction of glyphosate with copper ions complexed by cysteamine, which results in a decrease in the intensity of copper redox current. Cyclic voltammetry was employed as a measuring technique. When dealing with voltammograms with numerous peaks changing in shape and size, it is difficult to define which signal is the most significant for the analyte determination; in these cases, a helpful approach is chemometrics. In this work, PLS (Partial Least Square regression) has been applied to build models to correlate the signal with the glyphosate concentration in standard aqueous solutions and tap water samples (matrix-matched calibration). The method's figures of merits were evaluated, obtaining a limit of quantification of about 5 μM. The reliability of the proposed sensor was verified by analyzing tap water spiked with glyphosate; recoveries higher than 90 % were achieved.
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Affiliation(s)
- Alberti Giancarla
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy.
| | - Camilla Zanoni
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Daniele Merli
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy
| | - Lisa Rita Magnaghi
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy; Unità di Ricerca di Pavia, INSTM, Via G. Giusti 9, 50121, Firenze, Italy
| | - Raffaela Biesuz
- Department of Chemistry, University of Pavia, Via Taramelli 12, 27100, Pavia, Italy; Unità di Ricerca di Pavia, INSTM, Via G. Giusti 9, 50121, Firenze, Italy
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An Optical Fiber Chemical Sensor for the Detection of Copper(II) in Drinking Water. SENSORS 2019; 19:s19235246. [PMID: 31795303 PMCID: PMC6928843 DOI: 10.3390/s19235246] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 11/19/2019] [Accepted: 11/25/2019] [Indexed: 12/14/2022]
Abstract
Highly sensitive plasmonic optical fiber platforms combined with receptors have been recently used to obtain selective sensors. A low-cost configuration can be obtained exploiting a D-shaped plastic optical fiber covered with a multilayer sensing surface. The multilayer consists of a gold film, functionalized with a specific receptor, where the surface plasmon resonance (SPR) occurs. The signal is produced by the refractive index variation occurring as a consequence of the receptor-to analyte binding. In this work, a selective sensor for copper(II) detection in drinking water, exploiting a self-assembled monolayer (SAM) of d,l-penicillamine as the sensing layer, has been developed and tested. Different concentrations of copper(II) in NaCl 0.1 M solutions at different pH values and in a real matrix (drinking water) have been considered. The results show that the sensor is able to sense copper(II) at concentrations ranging from 4 × 10−6 M to 2 × 10−4 M. The use of this optical chemical sensor is a very attractive perspective for fast, in situ and low-cost detection of Cu(II) in drinking water for human health concerns. Furthermore, the possibility of remote control is feasible as well, because optical fibers are employed.
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A ω-mercaptoundecylphosphonic acid chemically modified gold electrode for uranium determination in waters in presence of organic matter. Talanta 2016; 151:119-125. [DOI: 10.1016/j.talanta.2016.01.032] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Revised: 01/12/2016] [Accepted: 01/14/2016] [Indexed: 11/24/2022]
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Merli D, Ravasio F, Protti S, Pesavento M, Profumo A. ω-Thio nitrilotriacetic chemically modified gold electrode for iron determination in natural waters with different salinity. Talanta 2014; 130:90-5. [PMID: 25159383 DOI: 10.1016/j.talanta.2014.06.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2014] [Revised: 06/11/2014] [Accepted: 06/18/2014] [Indexed: 11/30/2022]
Abstract
The preparation, characterization and analytical application of a chemically modified gold electrode (CME), based on ω-thio nitrilotriacetic acid derivative (N-[5-[[[[20-(acetylthio)-3,6,9-trioxaeicos-1-yl]oxo]carbonyl]amino]-1carboxypentyl]iminodiacetic acid) self-assembled monolayer (SAM), have been described. The electrode has been characterized by electrochemical techniques and tested for its response towards metallic ions, demonstrating to be effective for the determination of ionized iron at sub-μg L(-1) level by differential pulse cathodic stripping voltammetry (DPCSV). The analytical response towards iron in natural water (tap water, marine water) and the interference of ions usually present and chelating agents (humic acids and EDTA as model ligand of high complexing capacity) have been evaluated.
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Affiliation(s)
- Daniele Merli
- Dipartimento di Chimica, Università degli Studi di Pavia, V.Le Taramelli 12, 27100 Pavia, Italy.
| | - Francesco Ravasio
- Dipartimento di Chimica, Università degli Studi di Pavia, V.Le Taramelli 12, 27100 Pavia, Italy
| | - Stefano Protti
- Dipartimento di Chimica, Università degli Studi di Pavia, V.Le Taramelli 12, 27100 Pavia, Italy
| | - Maria Pesavento
- Dipartimento di Chimica, Università degli Studi di Pavia, V.Le Taramelli 12, 27100 Pavia, Italy
| | - Antonella Profumo
- Dipartimento di Chimica, Università degli Studi di Pavia, V.Le Taramelli 12, 27100 Pavia, Italy
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Hegazy M, Badawi A, Abd El Rehim S, Kamel W. Influence of copper nanoparticles capped by cationic surfactant as modifier for steel anti-corrosion paints. EGYPTIAN JOURNAL OF PETROLEUM 2013; 22:549-556. [DOI: 10.1016/j.ejpe.2013.11.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Functional gold nanorod particles on conducting polymer poly(3-octylthiophene) as non-enzymatic glucose sensor. REACT FUNCT POLYM 2012. [DOI: 10.1016/j.reactfunctpolym.2011.11.006] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Merli D, Zavarise F, Tredici I, Pesavento M, Profumo A. Characterization and Analytical Applications of a Coenzyme-A Chemically Modified Gold Electrode. ELECTROANAL 2011. [DOI: 10.1002/elan.201100420] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Mandler D, Kraus-Ophir S. Self-assembled monolayers (SAMs) for electrochemical sensing. J Solid State Electrochem 2011. [DOI: 10.1007/s10008-011-1493-6] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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Chen Z, Li L, Mu X, Zhao H, Guo L. Electrochemical aptasensor for detection of copper based on a reagentless signal-on architecture and amplification by gold nanoparticles. Talanta 2011; 85:730-5. [PMID: 21645766 DOI: 10.1016/j.talanta.2011.04.056] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 04/15/2011] [Accepted: 04/21/2011] [Indexed: 11/26/2022]
Abstract
A highly sensitive and specific electrochemical aptasensor for Cu(2+) detection based on gold nanoparticles (AuNPs) is presented. In this work, AuNPs offered a big surface area to immobilize a large number of aptamers and excellent electrochemical signal transduction. Its high sensitivity, low detection limit, and wide detection range are the main advantages over our former copper aptasensor. The peak current increased proportionally to the Cu(2+) concentration over the range from 0.1 nM to 10 μM with a detection limit of 0.1 pM. The presence of other divalent metal ions did not affect the detection of Cu(2+), which indicates a high specificity of Cu(2+) detection could be detected. Rapidity, simplicity, and excellent selectivity make it suitable for practical use in determination of Cu(2+) from lake samples.
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Affiliation(s)
- Zhengbo Chen
- School of Chemistry & Environment, Beihang University, Beijing 100191, China
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Mandler D. Formation, Characterization, and Applications of Organic and Inorganic Nanometric Films. Isr J Chem 2010. [DOI: 10.1002/ijch.201000028] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Application of l-thiazolidine-4-carboxylic acid monolayer in electrochemical determination of copper(II). Sci China Chem 2010. [DOI: 10.1007/s11426-010-0038-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Zhao H, Jiang Y, Ma Y, Wu Z, Cao Q, He Y, Li X, Yuan Z. Poly(2-amino-4-thiazoleacetic acid)/multiwalled carbon nanotubes modified glassy carbon electrodes for the electrochemical detection of copper(II). Electrochim Acta 2010. [DOI: 10.1016/j.electacta.2009.12.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Yang GJ, Qu XL, Zhu AP, Wang CY, Qu QS, Hu XY. Characterization, growth mechanism and application of network poly(bromophenol blue). J Electroanal Chem (Lausanne) 2007. [DOI: 10.1016/j.jelechem.2007.02.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Mohadesi A, Taher MA. Overoxidized Polypyrrole Doped with 4,5-Dihydroxy-3-(p-sulfophenylazo)-2,7-naphthalene Disulfonic Acid as a Selective and Regenerable Film for the Stripping Detection of Copper(II). ANAL SCI 2007; 23:969-74. [PMID: 17690430 DOI: 10.2116/analsci.23.969] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A conducting polymer modified electrode based on the incorporation of 4,5-dihydroxy-3-(p-sulfophenylazo)-2,7-naphthalene disulfonic acid, SPADNS, as an anionic complexing ligand into polypyrrole film during electropolymerization was prepared. The electroanalysis of copper(II) in this modified electrode was achieved by medium exchange and differential pulse voltammetry. Copper ions were accumulated from ammonia buffer on the electrode surface by the formation of a chemical complex at open circuit. The resulting electrode with complexed Cu(2+) was then transferred to an acetate buffer and subjected to anodic stripping voltammetry. The analytical performance was evaluated and, finally, linear calibration graphs were obtained in the concentration range of 2 - 250 ng ml(-1) for Cu(II). The detection limit was found to be 1.1 ng ml(-1) and RSD was obtained at 3.1 and 1.9% for two different concentrations. Many coexisting metal ions had little or no effect on the determination of copper. The developed method was applied to Cu(II) determination in natural water and human hair samples. Also, the rapid and convenient regeneration of electrode allows the use of a single modified electrode in multiple analyses.
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Affiliation(s)
- Alireza Mohadesi
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran
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Bieri M, Bürgi T. D-penicillamine adsorption on gold: an in situ ATR-IR spectroscopic and QCM study. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2006; 22:8379-86. [PMID: 16981752 DOI: 10.1021/la061454y] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
The adsorption of penicillamine from ethanol on gold was studied in situ by attenuated total reflection infrared (ATR-IR) and quartz crystal microbalance (QCM) experiments. Both ATR-IR and QCM reveal a fast mass uptake. In ethanol, the molecule adopts a zwitterionic form. Upon adsorption, part of the molecules deprotonate at the amine group, which is a relatively slow process that goes along with a strong shift of the nu(as)(COO(-)) mode. Both ATR-IR and QCM confirm a physisorbed layer. ATR-IR furthermore shows that the latter consists of zwitterionic molecules only, whereas both zwitterionic and anionic species are found in the chemisorbed layer. The infrared spectra of the physisorbed and chemisorbed layers are rather different, and the molecules within both layers seem to be oriented with respect to the surface. The ATR-IR spectra furthermore indicate that all three functional groups of penicillamine (i.e., thiol, carboxylate, and amine) interact with the surface, and density functional theory calculations support this finding. QCM also shows that the molecule uses considerably more space on the surface than molecules of similar size, which supports a three-point interaction. The latter leads to a strong anchoring of the molecule to the metal, which may explain the exceptional capability of penicillamine to bind metals.
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Affiliation(s)
- Marco Bieri
- Faculté des Sciences, Institut de Microtechnique, Université de Neuchâtel, Rue Emile Argand 11, Bâtiment G, 2009-Neuchâtel, Switzerland
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Zhang S, Cardona CM, Echegoyen L. Ion recognition properties of self-assembled monolayers (SAMs). Chem Commun (Camb) 2006:4461-73. [PMID: 17283788 DOI: 10.1039/b608146k] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the search for new sensors, self-assembled monolayers (SAMs) have gained intensive interest due to their nanometre size, highly-ordered structures, and molecular recognition properties. This article presents an overview of ion recognition at SAM-modified surface/solution interfaces, and brings up to date the most notable examples for the sensing of cations and anions. Sensing is achieved with SAMs containing redox active and inactive receptors using techniques such as fluorescence spectroscopy, cyclic voltammetry and electrochemical impedance spectroscopy.
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Affiliation(s)
- Sheng Zhang
- Department of Chemistry, Clemson University, Clemson, SC, USA
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