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Ziyatdinova G, Gimadutdinova L. Recent Advances in Electrochemical Sensors for Sulfur-Containing Antioxidants. MICROMACHINES 2023; 14:1440. [PMID: 37512751 PMCID: PMC10384414 DOI: 10.3390/mi14071440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/16/2023] [Accepted: 07/17/2023] [Indexed: 07/30/2023]
Abstract
Sulfur-containing antioxidants are an important part of the antioxidant defense systems in living organisms under the frame of a thiol-disulfide equilibrium. Among them, l-cysteine, l-homocysteine, l-methionine, glutathione, and α-lipoic acid are the most typical representatives. Their actions in living systems are briefly discussed. Being electroactive, sulfur-containing antioxidants are interesting analytes to be determined using various types of electrochemical sensors. Attention is paid to the chemically modified electrodes with various nanostructured coverages. The analytical capabilities of electrochemical sensors for sulfur-containing antioxidant quantification are summarized and discussed. The data are summarized and presented on the basis of the electrode surface modifier applied, i.e., carbon nanomaterials, metal and metal oxide nanoparticles (NPs) and nanostructures, organic mediators, polymeric coverage, and mixed modifiers. The combination of various types of nanomaterials provides a wider linear dynamic range, lower limits of detection, and higher selectivity in comparison to bare electrodes and sensors based on the one type of surface modifier. The perspective of the combination of chromatography with electrochemical detection providing the possibility for simultaneous determination of sulfur-containing antioxidants in a complex matrix has also been discussed.
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Affiliation(s)
- Guzel Ziyatdinova
- Analytical Chemistry Department, Kazan Federal University, Kremleyevskaya, 18, Kazan 420008, Russia
| | - Liliya Gimadutdinova
- Analytical Chemistry Department, Kazan Federal University, Kremleyevskaya, 18, Kazan 420008, Russia
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Uçar A, Aydoğdu Tığ G, Er E. Recent advances in two dimensional nanomaterial-based electrochemical (bio)sensing platforms for trace-level detection of amino acids and pharmaceuticals. Trends Analyt Chem 2023. [DOI: 10.1016/j.trac.2023.117027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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3
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Imanzadeh H, Sefid-Sefidehkhan Y, Afshary H, Afruz A, Amiri M. Nanomaterial-based electrochemical sensors for detection of amino acids. J Pharm Biomed Anal 2023; 230:115390. [PMID: 37079932 DOI: 10.1016/j.jpba.2023.115390] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 03/24/2023] [Accepted: 04/08/2023] [Indexed: 04/22/2023]
Abstract
Amino acids are the building blocks of proteins and muscle tissue. They also play a significant role in physiological processes related to energy, recovery, mood, muscle and brain function, fat burning and stimulating growth hormone or insulin secretion. Accurate determination of amino acids in biological fluids is necessary because any changes in their normal ranges in the body warn diseases like kidney disease, liver disease, type 2 diabetes and cancer. To date, many methods such as liquid chromatography, fluorescence mass spectrometry, etc. have been used for the determination of amino acids. Compared with the above techniques, electrochemical systems using modified electrodes offer a rapid, accurate, cheap, real-time analytical path through simple operations with high selectivity and sensitivity. Nanomaterials have found many interests to create smart electrochemical sensors in different application fields e.g. biomedical, environmental, and food analysis because of their exceptional properties. This review summarizes recent advances in the development of nanomaterial-based electrochemical sensors in 2017-2022 for the detection of amino acids in various matrices such as serum, urine, blood and pharmaceuticals.
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Affiliation(s)
- Hamideh Imanzadeh
- Department of Chemistry, University of Mohaghegh Ardabili, Ardabil, Iran
| | | | - Hosein Afshary
- Department of Chemistry, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Ali Afruz
- Department of Chemistry, University of Mohaghegh Ardabili, Ardabil, Iran
| | - Mandana Amiri
- Department of Chemistry, University of Mohaghegh Ardabili, Ardabil, Iran.
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Carvalho da Silva VN, Farias EADO, Araújo AR, Xavier Magalhães FE, Neves Fernandes JR, Teles Souza JM, Eiras C, Alves da Silva D, Hugo do Vale Bastos V, Teixeira SS. Rapid and selective detection of dopamine in human serum using an electrochemical sensor based on zinc oxide nanoparticles, nickel phthalocyanines, and carbon nanotubes. Biosens Bioelectron 2022; 210:114211. [PMID: 35468419 DOI: 10.1016/j.bios.2022.114211] [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: 02/04/2022] [Revised: 03/17/2022] [Accepted: 03/20/2022] [Indexed: 12/29/2022]
Abstract
Composite materials have gained significant attention owing to the synergistic effects of their constituent materials, thereby facilitating their utilization in new applications or in improving the existing ones. In this study, a composite based on nickel phthalocyanine (NiTsPc), zinc oxide nanoparticles (ZnONPs), and carbon nanotubes (CNT) was developed and subsequently immobilized on a pyrolytic graphite electrode (PGE). The PGE/NiTsPc-ZnONPs-CNT was identified as a selective catalytic hybrid system for detection of neurotransmitter dopamine (DA). The electrochemical and morphological characterizations were conducted using atomic force microscopy (AFM). Chronoamperometry and differential pulse voltammetry (DPV) were used to detect DA and detection limits of 24 nM and 7.0 nM was found, respectively. In addition, the effects of some possible DA interferents, such as ascorbic acid, uric acid, and serotonin, on DA response were evaluated. Their presence did not show significant variations in the DA electrochemical response. The high specificity and sensitivity of PGE/NiTsPc-ZnONPs-CNT for DA enabled its direct detection in human serum without sample pretreatment as well as in DA-enriched serum samples, whose recovery levels were close to 100%, thereby confirming the effectiveness of the proposed method. In general, PGE/NiTsPc-ZnONPs-CNT is a promising candidate for future applications in clinical diagnosis.
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Affiliation(s)
- Valécia Natália Carvalho da Silva
- Laboratório de Neuroinovação Tecnológica & Mapeamento Cerebral - NITLAB, Universidade Federal do Delta do Parnaíba, Parnaíba, PI 64202-020, Brazil.
| | - Emanuel Airton de O Farias
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, BIOTEC, Universidade Federal do Delta do Parnaíba, Parnaíba, PI 64202-020, Brazil.
| | - Alyne R Araújo
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, BIOTEC, Universidade Federal do Delta do Parnaíba, Parnaíba, PI 64202-020, Brazil
| | - Francisco Elezier Xavier Magalhães
- Laboratório de Neuroinovação Tecnológica & Mapeamento Cerebral - NITLAB, Universidade Federal do Delta do Parnaíba, Parnaíba, PI 64202-020, Brazil
| | - Jacks Renan Neves Fernandes
- Laboratório de Neuroinovação Tecnológica & Mapeamento Cerebral - NITLAB, Universidade Federal do Delta do Parnaíba, Parnaíba, PI 64202-020, Brazil
| | - Jéssica Maria Teles Souza
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, BIOTEC, Universidade Federal do Delta do Parnaíba, Parnaíba, PI 64202-020, Brazil
| | - Carla Eiras
- Laboratório de Pesquisa e Desenvolvimento de Novos Materiais e Sistemas Sensores - MATSENS, Centro de Tecnologia, Universidade Federal do Piauí, Teresina, PI 64049-550, Brazil.
| | - Durcilene Alves da Silva
- Núcleo de Pesquisa em Biodiversidade e Biotecnologia, BIOTEC, Universidade Federal do Delta do Parnaíba, Parnaíba, PI 64202-020, Brazil
| | - Victor Hugo do Vale Bastos
- Laboratório de Mapeamento e Funcionalidade Cerebral - LAMCEF, Universidade Federal do Delta do Parnaíba, Parnaíba, PI 64202-020, Brazil
| | - Silmar Silva Teixeira
- Laboratório de Neuroinovação Tecnológica & Mapeamento Cerebral - NITLAB, Universidade Federal do Delta do Parnaíba, Parnaíba, PI 64202-020, Brazil
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Parshina AV, Safronova EY, Kolganova TS, Kuleshova VA, Bobreshova OV. MF-4SC Membranes Modified with Carboxylated Carbon Nanotubes for Potentiometric Determination of Alanine, Valine, and Phenylalanine in Alkaline Solutions. MEMBRANES AND MEMBRANE TECHNOLOGIES 2022. [DOI: 10.1134/s2517751622040072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Voltammetric Electrochemical Behavior of Carbon Paste Electrode Containing Intrinsic Silver for Determination of Cysteine. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10070240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this paper, the electrochemical behavior of cysteine is described, using carbon paste electrodes (CPEs) modified with ternary silver-copper sulfide containing intrinsic silver at two pH values (pH 3 and 5). Experiments have revealed that presence of cysteine has a large impact on the electrochemical behavior of modified CPEs. Observed phenomena take place in solution, as well as at the surface of the modified CPEs, and can be applied for electroanalytical purposes. Based on the electrochemical behavior observed in the examined system, differential pulse voltammetry (DPV) was selected as an electroanalytical method for determination of cysteine. The effects of the various parameters on the electroanalytical signal, such as the amount of electroactive material, electroanalytical parameters, pH etc., were investigated using differential pulse voltammograms. The results indicated that electrochemical signal characterized with well-defined cathodic peak at 0.055 V vs. Ag/AgCl (3 M) in acetic buffer solution at pH 5 can be used for indirect electrochemical determination of cysteine. The optimization procedure revealed that the most sensitive and stabile electrode was that containing 5% modifier. The DPV response of the electrode, in the presence of cysteine, showed two different linear concentration ranges of 0.1 to 2.5 μM, and 5.6 to 28 μM. The explanation of the origin of two linear ranges is proposed. The lower concentration range was characterized by remarkable sensitivity of the 11.78 μA μM–1, owing to the chosen indirect method of determination. The calculated limit of detection (LOD), as well as limit of quantification (LOQ) were 0.032 and 0.081 μM, respectively. The influence of interfering agents on the electroanalytical response was examined, and low or no interference on the DPVs was observed. The proposed method was validated and applied for the determination of cysteine in pharmaceutical preparations with satisfactory recoveries in the range of 97 to 101.7%.
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Wang L, Wu Q, Yu R, Zhang H, Nie F, Zhang W. Enhancing K 2S 2O 8 electrochemiluminescence based on silver nanoparticles and zinc metal–organic framework composite (AgNPs@ZnMOF) for the determination of l-cysteine. RSC Adv 2022; 12:23437-23446. [PMID: 36090446 PMCID: PMC9382358 DOI: 10.1039/d2ra04033f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Accepted: 08/02/2022] [Indexed: 11/21/2022] Open
Abstract
A silver nanoparticle-doped Zn(ii) metal–organic framework composite (AgNPs@ZnMOF) was investigated as an electrochemiluminescence (ECL) signal enhancer for potassium persulfate. First, ZnMOF was prepared by a one-step hydrothermal method, and then AgNPs@ZnMOF composite was obtained by depositing AgNPs on the surface and interior of ZnMOF. After the AgNPs@ZnMOF composite was modified on the glass carbon electrode (GCE), the cathode luminescence of potassium persulfate on bare GCE was enhanced by 8 times. A dual amplification mechanism provided by Zn(ii) and Ag nanoparticles in the AgNPs@ZnMOF composite has been validated by ECL spectra, fluorescence spectra, and electrochemical methods. The interaction between the sulfhydryl groups in l-cysteine (l-Cys) and AgNPs significantly affects the catalytic luminescence of the AgNPs@ZnMOF composite. Thus, a sensitive ECL method for the determination of l-Cys was developed based on the inhibition effect of l-Cys on the ECL signal within the linear range from 5.0 nM to 1.0 μM and the limit of detection was found to be 2 nM (S/N = 3). The established method has been successfully applied to the determination of l-Cys in human urine. A silver nanoparticle-doped Zn(ii) metal–organic framework composite (AgNPs@ZnMOF) was investigated as an electrochemiluminescence (ECL) signal enhancer for potassium persulfate.![]()
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Affiliation(s)
- Lina Wang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry & Materials Science, Northwest University, Xi’ an, 710069, PR China
| | - Qi Wu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry & Materials Science, Northwest University, Xi’ an, 710069, PR China
| | - Ru Yu
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry & Materials Science, Northwest University, Xi’ an, 710069, PR China
| | - Hongge Zhang
- Faculty of Chemistry and Chemical Engineering, Key Laboratory of Phytochemistry of Shaanxi Province, Baoji University of Arts and Sciences, Baoji, 721013, Shaanxi, PR China
| | - Fei Nie
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry & Materials Science, Northwest University, Xi’ an, 710069, PR China
| | - Wenyan Zhang
- Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), College of Chemistry & Materials Science, Northwest University, Xi’ an, 710069, PR China
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Moulaee K, Neri G. Electrochemical Amino Acid Sensing: A Review on Challenges and Achievements. BIOSENSORS 2021; 11:502. [PMID: 34940259 PMCID: PMC8699811 DOI: 10.3390/bios11120502] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/18/2021] [Accepted: 11/25/2021] [Indexed: 05/05/2023]
Abstract
The rapid growth of research in electrochemistry in the last decade has resulted in a significant advancement in exploiting electrochemical strategies for assessing biological substances. Among these, amino acids are of utmost interest due to their key role in human health. Indeed, an unbalanced amino acid level is the origin of several metabolic and genetic diseases, which has led to a great need for effective and reliable evaluation methods. This review is an effort to summarize and present both challenges and achievements in electrochemical amino acid sensing from the last decade (from 2010 onwards) to show where limitations and advantages stem from. In this review, we place special emphasis on five well-known electroactive amino acids, namely cysteine, tyrosine, tryptophan, methionine and histidine. The recent research and achievements in this area and significant performance metrics of the proposed electrochemical sensors, including the limit of detection, sensitivity, stability, linear dynamic range(s) and applicability in real sample analysis, are summarized and presented in separate sections. More than 400 recent scientific studies were included in this review to portray a rich set of ideas and exemplify the capabilities of the electrochemical strategies to detect these essential biomolecules at trace and even ultra-trace levels. Finally, we discuss, in the last section, the remaining issues and the opportunities to push the boundaries of our knowledge in amino acid electrochemistry even further.
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Affiliation(s)
- Kaveh Moulaee
- Department of Engineering, University of Messina, C.Da Di Dio, I-98166 Messina, Italy;
- Center of Excellence in Electrochemistry, School of Chemistry, College of Science, University of Tehran, Tehran 16846-13114, Iran
| | - Giovanni Neri
- Department of Engineering, University of Messina, C.Da Di Dio, I-98166 Messina, Italy;
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Highly active catalyst using zeolitic imidazolate framework derived nano-polyhedron for the electro-oxidation of l-cysteine and amperometric sensing. J Colloid Interface Sci 2021; 603:822-833. [PMID: 34237600 DOI: 10.1016/j.jcis.2021.06.154] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Revised: 06/24/2021] [Accepted: 06/27/2021] [Indexed: 01/25/2023]
Abstract
Herein, N-doped porous carbon nano-polyhedron embedded with Co3O4 (Co3O4-NPCN) was reported for the electro-catalytic oxidation and amperometric detection of l-cysteine. Co3O4-NPCN was synthesized by the two-step redox calcination of zeolitic imidazolate framework (ZIF). Surface morphology characterization revealed that Co3O4-NPCN displayed a uniform size and rhombic dodecahedral shape. Structure and composition analysis found that Co3O4-NPCN was a N-doped carbon polyhedral matrix with hollow and porous structure, and Co3O4 nano-spheres were evenly distributed into the polyhedral matrix. Due to the hollow and porous structure, N-doped carbon matrix and embedded Co3O4 nano-spheres, Co3O4-NPCN performed a remarkable electro-catalysis towards the oxidation of l-cysteine at a very low potential of 0.10 V. A diffusion-controlled l-cysteine oxidation process was observed at Co3O4-NPCN prepared electrode. Accordingly, amperometric method was established for l-cysteine detection with a very fast current response in 2 s, wide linear range of 0.05 μM- 5.2 mM and low detection limit of 6.9 nM. Besides, notable selectivity, repeatability, reproducibility and long-term stability were also achieved. Moreover, Co3O4-NPCN sensor was successfully applied to the l-cysteine detection in human serum samples indicating the practical application of the as-developed sensor.
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Tajik S, Dourandish Z, Jahani PM, Sheikhshoaie I, Beitollahi H, Shahedi Asl M, Jang HW, Shokouhimehr M. Recent developments in voltammetric and amperometric sensors for cysteine detection. RSC Adv 2021; 11:5411-5425. [PMID: 35423079 PMCID: PMC8694840 DOI: 10.1039/d0ra07614g] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 12/06/2020] [Indexed: 12/27/2022] Open
Abstract
This review article aims to provide an overview of the recent advances in the voltammetric and amperometric sensing of cysteine (Cys). The introduction summarizes the important role of Cys as an essential amino acid, techniques for its sensing, and the utilization of electrochemical methods and chemically modified electrodes for its determination. The main section covers voltammetric and amperometric sensing of Cys based on glassy carbon electrodes, screen printed electrodes, and carbon paste electrodes, modified with various electrocatalytic materials. The conclusion section discusses the current challenges of Cys determination and the future perspectives.
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Affiliation(s)
- Somayeh Tajik
- Research Center for Tropical and Infectious Diseases, Kerman University of Medical Sciences Kerman Iran
| | - Zahra Dourandish
- Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman Kerman 76175-133 Iran
| | | | - Iran Sheikhshoaie
- Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman Kerman 76175-133 Iran
| | - Hadi Beitollahi
- Environment Department, Institute of Science and High Technology and Environmental Sciences, Graduate University of Advanced Technology Kerman Iran
| | - Mehdi Shahedi Asl
- Marine Additive Manufacturing Centre of Excellence (MAMCE), University of New Brunswick Fredericton NB E3B 5A1 Canada
| | - Ho Won Jang
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University Seoul 08826 Republic of Korea
| | - Mohammadreza Shokouhimehr
- Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University Seoul 08826 Republic of Korea
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Rasheed PA, Pandey RP, Jabbar KA, Mahmoud KA. Platinum nanoparticles/Ti3C2Tx (MXene) composite for the effectual electrochemical sensing of Bisphenol A in aqueous media. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2020.114934] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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12
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Yarkaeva YA, Dubrovskii DI, Zil’berg RA, Maistrenko VN. Voltammetric Sensors and Sensor System Based on Gold Electrodes Modified with Polyarylenephthalides for Cysteine Recognition. RUSS J ELECTROCHEM+ 2020. [DOI: 10.1134/s102319352007006x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ghorbani F, Abbaszadeh H, Mehdizadeh A, Ebrahimi-Warkiani M, Rashidi MR, Yousefi M. Biosensors and nanobiosensors for rapid detection of autoimmune diseases: a review. Mikrochim Acta 2019; 186:838. [DOI: 10.1007/s00604-019-3844-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 09/17/2019] [Indexed: 12/15/2022]
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Parshina AV, Titova TS, Evdokimova DD, Bobreshova OV, Safronova EY, Prikhno IA, Yaroslavtsev AB. Hybrid Materials Based on MF-4SC Membranes and Carbon Nanotubes: Transport Properties and Characteristics of DP-sensors in Hydrophobic Amino Acid Solutions. MEMBRANES AND MEMBRANE TECHNOLOGIES 2019. [DOI: 10.1134/s2517751619040073] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Heidari M, Ghaffarinejad A. Electrochemical sensor for L-cysteine by using a cobalt(II)/aluminum(III) layered double hydroxide as a nanocatalyst. Mikrochim Acta 2019; 186:365. [DOI: 10.1007/s00604-019-3462-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2019] [Accepted: 04/28/2019] [Indexed: 12/17/2022]
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Apel PY, Bobreshova OV, Volkov AV, Volkov VV, Nikonenko VV, Stenina IA, Filippov AN, Yampolskii YP, Yaroslavtsev AB. Prospects of Membrane Science Development. MEMBRANES AND MEMBRANE TECHNOLOGIES 2019. [DOI: 10.1134/s2517751619020021] [Citation(s) in RCA: 91] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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Optical, electrochemical and catalytic methods for in-vitro diagnosis using carbonaceous nanoparticles: a review. Mikrochim Acta 2019; 186:50. [DOI: 10.1007/s00604-018-3110-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Accepted: 11/25/2018] [Indexed: 12/16/2022]
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Vladislavić N, Rončević IŠ, Buljac M, Brinić S, Krivić D, Buzuk M. Electroanalytical Determination of Cysteine Using the Electrodes Based on Ternary Silver-Copper Sulfides. SENSORS (BASEL, SWITZERLAND) 2018; 18:E3753. [PMID: 30400261 PMCID: PMC6263894 DOI: 10.3390/s18113753] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/07/2018] [Revised: 10/29/2018] [Accepted: 10/31/2018] [Indexed: 01/08/2023]
Abstract
The amperometric determination of cysteine, using an electrode based on ternary silver-copper sulfide, is presented. Electrochemical characterizations (using cyclic voltammetry) of three electrode materials revealed that the electrode based on the material that consists of jalpaite (Ag₃CuS₂), doped with a small amount of metallic silver, has the best electrocatalytical performance for cysteine oxidation. For the amperometric determination, 0.142 V at pH 5 and 0.04 V at pH 7 vs. Ag/AgCl, related to the electrocatalytical oxidation of thiol group, were chosen. Electrochemical impedance spectroscopy together with Fourier transform infrared spectroscopy (FTIR) revealed that oxidation takes place on the electrode surface with fouling effect, which does not affect a wide linear working range between 1 μM and 100 μM. Sensitivities, at pH 5 and pH 7, are calculated to be 0.11 μA μM-1 and 0.10 μA μM-1, respectively. The detection limits were determined to be 0.036 μM and 0.024 μM for pH 5 and pH 7, respectively. In the presence of uric acid, folic acid, ascorbic acid, and glucose no interference was noticed. This electrode showed remarkable stability and excellent reproducibility. The electrode was exploited for the determination of cysteine in a dietary supplement with the excellent recoveries.
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Affiliation(s)
- Nives Vladislavić
- Department of General and Inorganic Chemistry, Faculty of Chemistry and Technology, University of Split, 21000 Split, Croatia.
| | - Ivana Škugor Rončević
- Department of General and Inorganic Chemistry, Faculty of Chemistry and Technology, University of Split, 21000 Split, Croatia.
| | - Maša Buljac
- Department of Environmental Chemistry, Faculty of Chemistry and Technology, University of Split, 21000 Split, Croatia.
| | - Slobodan Brinić
- Department of General and Inorganic Chemistry, Faculty of Chemistry and Technology, University of Split, 21000 Split, Croatia.
| | - Denis Krivić
- Faculty of Chemistry and Technology, University of Split, 21000 Split, Croatia.
| | - Marijo Buzuk
- Department of General and Inorganic Chemistry, Faculty of Chemistry and Technology, University of Split, 21000 Split, Croatia.
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