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Tene T, Bellucci S, Arias Arias F, Carrera Almendariz LS, Flores Huilcapi AG, Vacacela Gomez C. Role of Graphene in Surface Plasmon Resonance-Based Biosensors. SENSORS (BASEL, SWITZERLAND) 2024; 24:4670. [PMID: 39066066 PMCID: PMC11280817 DOI: 10.3390/s24144670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/19/2024] [Revised: 07/08/2024] [Accepted: 07/16/2024] [Indexed: 07/28/2024]
Abstract
This work explores the transformative role of graphene in enhancing the performance of surface plasmon resonance (SPR)-based biosensors. The motivation for this review stems from the growing interest in the unique properties of graphene, such as high surface area, excellent electrical conductivity, and versatile functionalization capabilities, which offer significant potential to improve the sensitivity, specificity, and stability of SPR biosensors. This review systematically analyzes studies published between 2010 and 2023, covering key metrics of biosensor performance. The findings reveal that the integration of graphene consistently enhances sensitivity. Specificity, although less frequently reported numerically, showed promising results, with high specificity achieved at sub-nanomolar concentrations. Stability enhancements are also significant, attributed to the protective properties of graphene and improved biomolecule adsorption. Future research should focus on mechanistic insights, optimization of integration techniques, practical application testing, scalable fabrication methods, and comprehensive comparative studies. Our findings provide a foundation for future research, aiming to further optimize and harness the unique physical properties of graphene to meet the demands of sensitive, specific, stable, and rapid biosensing in various practical applications.
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Affiliation(s)
- Talia Tene
- Department of Chemistry, Universidad Técnica Particular de Loja, Loja 110160, Ecuador;
| | - Stefano Bellucci
- INFN-Laboratori Nazionali di Frascati, Via E. Fermi 54, I-00044 Frascati, Italy
| | - Fabian Arias Arias
- Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo (ESPOCH), Riobamba 060155, Ecuador
- Dipartimento di Chimica e Tecnologie Chimiche, University of Calabria, Via P. Bucci, Cubo 15D, I-87036 Rende, Italy
| | | | - Ana Gabriela Flores Huilcapi
- Facultad de Ciencia e Ingeniería en Alimentos y Biotecnología, Universidad Técnica de Ambato, Ambato 180104, Ecuador
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Pratap Singh Raman A, Thakur G, Pandey G, Kumari K, Singh P. An Updated Review on Functionalized Graphene as Sensitive Materials in Sensing of Pesticides. Chem Biodivers 2024; 21:e202302080. [PMID: 38578653 DOI: 10.1002/cbdv.202302080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2023] [Revised: 04/02/2024] [Accepted: 04/05/2024] [Indexed: 04/06/2024]
Abstract
Numerous chemical pesticides were employed for a long time to manage pests, but their uncontrolled application harmed the health and the environment. Accurately quantifying pesticide residues is essential for risk evaluation and regulatory purposes. Numerous analytical methods have been developed and utilized to achieve sensitive and specific detection of pesticides in intricate sampl es like water, soil, food, and air. Electrochemical sensors based on amperometry, potentiometry, or impedance spectroscopy offer portable, rapid, and sensitive detection suitable for on-site analysis. This study examines the potential of electrochemical sensors for the accurate evaluation of various effects of pesticides. Emphasizing the use of Graphene (GR), Graphene Oxide (GO), Reduced Graphene Oxide (rGO), and Graphdiyne composites, the study highlights their enhanced performance in pesticide sensing by stating the account of many actual sensors that have been made for specific pesticides. Computational studies provide valuable insights into the adsorption kinetics, binding energies, and electronic properties of pesticide-graphene complexes, guiding the design and optimization of graphene-based sensors with improved performance. Furthermore, the discussion extends to the emerging field of biopesticides. While the GR/GO/rGO based sensors hold immense future prospects, and their existing limitations have also been discussed, which need to be solved with future research.
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Affiliation(s)
- Anirudh Pratap Singh Raman
- Department of Chemistry, Atma Ram Sanatan Dharma College, University of Delhi, Delhi, India
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Delhi- NCR Campus, Delhi-Merrut Road, Modinagar, Ghaziabad, UP, India
| | - Gauri Thakur
- Department of Chemistry, Atma Ram Sanatan Dharma College, University of Delhi, Delhi, India
- Department of Chemistry, Indian Institute of Technology, Madras, India
| | - Garima Pandey
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Delhi- NCR Campus, Delhi-Merrut Road, Modinagar, Ghaziabad, UP, India
| | - Kamlesh Kumari
- Department of Zoology, University of Delhi, Delhi, India
| | - Prashant Singh
- Department of Chemistry, Atma Ram Sanatan Dharma College, University of Delhi, Delhi, India
- Department of Chemistry, Faculty of Engineering and Technology, SRM Institute of Science and Technology, Delhi- NCR Campus, Delhi-Merrut Road, Modinagar, Ghaziabad, UP, India
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Gopinath SCB, Ramanathan S, More M, Patil K, Patil SJ, Patil N, Mahajan M, Madhavi V. A Review on Graphene Analytical Sensors for Biomarker-based Detection of Cancer. Curr Med Chem 2024; 31:1464-1484. [PMID: 37702170 DOI: 10.2174/0929867331666230912101634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 05/01/2023] [Accepted: 06/22/2023] [Indexed: 09/14/2023]
Abstract
The engineering of nanoscale materials has broadened the scope of nanotechnology in a restricted functional system. Today, significant priority is given to immediate health diagnosis and monitoring tools for point-of-care testing and patient care. Graphene, as a one-atom carbon compound, has the potential to detect cancer biomarkers and its derivatives. The atom-wide graphene layer specialises in physicochemical characteristics, such as improved electrical and thermal conductivity, optical transparency, and increased chemical and mechanical strength, thus making it the best material for cancer biomarker detection. The outstanding mechanical, electrical, electrochemical, and optical properties of two-dimensional graphene can fulfil the scientific goal of any biosensor development, which is to develop a more compact and portable point-of-care device for quick and early cancer diagnosis. The bio-functionalisation of recognised biomarkers can be improved by oxygenated graphene layers and their composites. The significance of graphene that gleans its missing data for its high expertise to be evaluated, including the variety in surface modification and analytical reports. This review provides critical insights into graphene to inspire research that would address the current and remaining hurdles in cancer diagnosis.
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Affiliation(s)
- Subash Chandra Bose Gopinath
- Faculty of Chemical Engineering & Technology, Universiti Malaysia Perlis (UniMAP), 02600 Arau, Perlis, Malaysia
- Institute of Nano Electronic Engineering, Universiti Malaysia Perlis (UniMAP), 01000 Kangar, Perlis, Malaysia
- Micro System Technology, Centre of Excellence (CoE), Universiti Malaysia Perlis (UniMAP), 02600 Arau, Perlis, Malaysia
| | - Santheraleka Ramanathan
- Department of Biomedical Engineering and Health Sciences, Faculty of Electrical Engineering, Universiti Teknologi Malaysia, 81310, Skudai, Johor, Malaysia
| | - Mahesh More
- Department of Pharmaceutics, Sanjivani College of Pharmaceutical Education and Research, Kopargaon, India
| | - Ketan Patil
- Department of Pharmaceutics, Ahinsa Institute of Pharmacy, Dondaicha, India
| | | | - Narendra Patil
- Department of Pharmacology, Dr. A.P.J. Abdul Kalam University, Indore, India
| | - Mahendra Mahajan
- Department of Pharmaceutical Chemistry, H.R. Patel Institute of Pharmacy, Shirpur, India
| | - Vemula Madhavi
- BVRIT Hyderabad college of Engineering for Women, Hyderabad, India
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Venegas CJ, Bollo S, Sierra-Rosales P. Carbon-Based Electrochemical (Bio)sensors for the Detection of Carbendazim: A Review. MICROMACHINES 2023; 14:1752. [PMID: 37763915 PMCID: PMC10536525 DOI: 10.3390/mi14091752] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 08/31/2023] [Accepted: 09/01/2023] [Indexed: 09/29/2023]
Abstract
Carbendazim, a fungicide widely used in agriculture, has been classified as a hazardous chemical by the World Health Organization due to its environmental persistence. It is prohibited in several countries; therefore, detecting it in food and environmental samples is highly necessary. A reliable, rapid, and low-cost method uses electrochemical sensors and biosensors, especially those modified with carbon-based materials with good analytical performance. In this review, we summarize the use of carbon-based electrochemical (bio)sensors for detecting carbendazim in environmental and food matrixes, with a particular interest in the role of carbon materials. Focus on publications between 2018 and 2023 that have been describing the use of carbon nanotubes, carbon nitride, graphene, and its derivatives, and carbon-based materials as modifiers, emphasizing the analytical performance obtained, such as linear range, detection limit, selectivity, and the matrix where the detection was applied.
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Affiliation(s)
- Constanza J. Venegas
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, Chile
| | - Soledad Bollo
- Centro de Investigación de Procesos Redox (CiPRex), Universidad de Chile, Sergio Livingstone Polhammer 1007, Independencia, Santiago 8380492, Chile
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile, Sergio Livingstone Polhammer 1007, Independencia, Santiago 8380492, Chile
| | - Paulina Sierra-Rosales
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, San Joaquín, Santiago 8940577, Chile
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Venegas CJ, Gutierrez FA, Reeves-McLaren N, Rivas GA, Ruiz-León D, Bollo S. In situ or Ex situ Synthesis for Electrochemical Detection of Hydrogen Peroxide-An Evaluation of Co 2SnO 4/RGO Nanohybrids. MICROMACHINES 2023; 14:mi14051059. [PMID: 37241682 DOI: 10.3390/mi14051059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/04/2023] [Accepted: 05/14/2023] [Indexed: 05/28/2023]
Abstract
Nowadays, there is no doubt about the high electrocatalytic efficiency that is obtained when using hybrid materials between carbonaceous nanomaterials and transition metal oxides. However, the method to prepare them may involve differences in the observed analytical responses, making it necessary to evaluate them for each new material. The goal of this work was to obtain for the first time Co2SnO4 (CSO)/RGO nanohybrids via in situ and ex situ methods and to evaluate their performance in the amperometric detection of hydrogen peroxide. The electroanalytical response was evaluated in NaOH pH 12 solution using detection potentials of -0.400 V or 0.300 V for the reduction or oxidation of H2O2. The results show that for CSO there were no differences between the nanohybrids either by oxidation or by reduction, unlike what we previously observed with cobalt titanate hybrids, in which the in situ nanohybrid clearly had the best performance. On the other hand, no influence in the study of interferents and more stable signals were obtained when the reduction mode was used. In conclusion, for detecting hydrogen peroxide, any of the nanohybrids studied, i.e., in situ or ex situ, are suitable to be used, and more efficiency is obtained using the reduction mode.
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Affiliation(s)
- Constanza J Venegas
- Programa Institucional de Fomento a la Investigación, Desarrollo e Innovación, Universidad Tecnológica Metropolitana, Ignacio Valdivieso 2409, P.O. Box 8940577, San Joaquín 8320000, Santiago, Chile
| | - Fabiana A Gutierrez
- Laboratorio de Desarrollo Analítico y Quimiometría (LADAQ), Cátedra de Química Analítica I, Facultad de Bioquímica y Ciencias Biológicas, Universidad Nacional del Litoral, Ciudad Universitaria, Santa Fe 3000, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Godoy Cruz CP C1425FQB, Buenos Aires 2290, Argentina
| | - Nik Reeves-McLaren
- Department of Materials Science and Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - Gustavo A Rivas
- Instituto de Investigaciones en Físico-Química de Córdoba (INFIQC), Departamento de Físicoquímica, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Ciudad Universitaria, Córdoba 5000, Argentina
| | - Domingo Ruiz-León
- Laboratorio de Fisicoquímica y Electroquímica del Estado Sólido, Facultad de Química y Biología, Universidad de Santiago de Chile, Av. Libertador Bernardo O'Higgins n◦ 3363, Estación Central 9160000, Santiago, Chile
| | - Soledad Bollo
- Centro de Investigación de Procesos Redox (CiPRex), Universidad de Chile, Sergio Livingstone Polhammer 1007, Independencia 8330015, Santiago, Chile
- Advanced Center for Chronic Diseases (ACCDiS), Universidad de Chile, Sergio Livingstone Polhammer 1007, Independencia 8330015, Santiago, Chile
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6
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Zaree P, Tomris I, de Vos SD, van der Woude R, Flesch FM, Klein Gebbink RJM, de Vries RP, Pieters RJ. Facile electrochemical affinity measurements of small and large molecules. RSC Adv 2023; 13:9756-9760. [PMID: 36994086 PMCID: PMC10041147 DOI: 10.1039/d3ra01029e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2023] [Accepted: 03/16/2023] [Indexed: 03/29/2023] Open
Abstract
A novel miniaturized sensor for electrochemical detection that contains graphene- and gold nanoparticles was functionalized with proteins. Using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) it was possible to observe and quantify interactions of molecules with these proteins. The protein binders included carbohydrate ligands as small as carbohydrates up to COVID-19 spike protein variants engaged in protein-protein interactions. The system uses off-the-shelf sensors combined with an affordable potentiostat and yet is sensitive enough for small ligand binding.
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Affiliation(s)
- Pouya Zaree
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University P. O. Box 80082 NL-3508 TB Utrecht The Netherlands
| | - Ilhan Tomris
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University P. O. Box 80082 NL-3508 TB Utrecht The Netherlands
| | - Sander D de Vos
- Institute for Sustainable and Circular Chemistry, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Roosmarijn van der Woude
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University P. O. Box 80082 NL-3508 TB Utrecht The Netherlands
| | - Frits M Flesch
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University P. O. Box 80082 NL-3508 TB Utrecht The Netherlands
| | - Robertus J M Klein Gebbink
- Institute for Sustainable and Circular Chemistry, Debye Institute for Nanomaterials Science, Utrecht University Universiteitsweg 99 3584 CG Utrecht The Netherlands
| | - Robert P de Vries
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University P. O. Box 80082 NL-3508 TB Utrecht The Netherlands
| | - Roland J Pieters
- Department of Chemical Biology & Drug Discovery, Utrecht Institute for Pharmaceutical Sciences, Utrecht University P. O. Box 80082 NL-3508 TB Utrecht The Netherlands
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Silver nanoparticles-glycine-functionalized graphene platform for ultra-sensitive determination of bergenin. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
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8
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Senthil T, Parkavi R, Senthil Kumar P, Chandramohan A, Rangasamy G, Srinivasan K, Dinakaran K. PbS/graphene hybrid nanostructures coated glassy carbon electrode for the electrochemical sensing of copper ions in aqueous solution. Food Chem Toxicol 2022; 168:113375. [PMID: 35995075 DOI: 10.1016/j.fct.2022.113375] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 08/08/2022] [Accepted: 08/11/2022] [Indexed: 01/21/2023]
Abstract
In this research, we have studied the electrochemical sensing of Cu(II) ions in aqueous solution using PbS/Graphene composite nanostructure coated glassy carbon electrode (GCE). The SEM-EDAX analysis revealed that the lead sulphide nanocrystals are homogeneously embedded on the graphene nanosheets with an uniform particle size of 100 nm, and the elements presents 92.32% and Lead content of 5.45% and Sulfur content of 0.91%. Raman spectra exhibits G with respect to the E2g sp2 hybridized C-C and D band with respect to the A1g mode in the disordered edge region of the GNS. The composite nanostructure coated GCE (PbS/Graphene/GCE) was prepared and its performance in the existence of metal ions such us Cd(II),Pb(II), Mg(II), Cu(II) and Ni(II) was studied using the current voltage curves in double distilled water within the scan rates of 25 to 300mVs-1. The PbS/Graphene coated carbon electrode exhibited the higher anodic and cathodic peak current for copper solution than the other metal ions studied, which various linearly proportional to concentration. The electrochemical sensing characteristics PbS/GNS/GCE was found to be significant towards detecting Cu2+ ion within the concentration range of 1 × 10-4 to 1 × 10-8 M, with a lowest sensing detection limit of 1 × 10-8 M.
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Affiliation(s)
- T Senthil
- Department of Chemistry, Thiruvalluvar University, Vellore, 632115, India
| | - R Parkavi
- Department of Chemistry, Thiruvalluvar University, Vellore, 632115, India
| | - P Senthil Kumar
- Department of Chemical Engineering, Sri SivasubarmaniaNadar College of Engineering, Kalavakkam, 603110, Tamilnadu, India; Centre of Excellence in Water Research (CEWAR), Sri SivasubramaniyaNadar College of Engineering, Kalavakkam, 603110, India.
| | - A Chandramohan
- Department of Chemical Engineering, Sri SivasubarmaniaNadar College of Engineering, Kalavakkam, 603110, Tamilnadu, India
| | - Gayathri Rangasamy
- University Centre for Research and Development & Department of Civil Engineering, Chandigarh University, Gharuan, Mohali, Punjab, 140413, India
| | - K Srinivasan
- Department of Chemistry, Thiruvalluvar University, Vellore, 632115, India
| | - K Dinakaran
- Department of Chemistry, Thiruvalluvar University, Vellore, 632115, India.
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Recent Trends in the Development of Carbon-Based Electrodes Modified with Molecularly Imprinted Polymers for Antibiotic Electroanalysis. CHEMOSENSORS 2022. [DOI: 10.3390/chemosensors10070243] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Antibiotics are antibacterial agents applied in human and veterinary medicine. They are also employed to stimulate the growth of food-producing animals. Despite their benefits, the uncontrolled use of antibiotics results in serious problems, and therefore their concentration levels in different foods as well as in environmental samples were regulated. As a consequence, there is an increasing demand for the development of sensitive and selective analytical tools for antibiotic reliable and rapid detection. These requirements are accomplished by the combination of simple, cost-effective and affordable electroanalytical methods with molecularly imprinted polymers (MIPs) with high recognition specificity, based on their “lock and key” working principle, used to modify the electrode surface, which is the “heart” of any electrochemical device. This review presents a comprehensive overview of MIP-modified carbon-based electrodes developed in recent years for antibiotic detection. The MIP preparation and electrode modification procedures, along with the performance characteristics of sensors and analytical methods, as well as the applications for the antibiotics’ quantification from different matrices (pharmaceutical, biological, food and environmental samples), are discussed. The information provided by this review can inspire researchers to go deeper into the field of MIP-modified sensors and to develop efficient means for reliable antibiotic determination.
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David IG, Buleandra M, Popa DE, Cheregi MC, Iorgulescu EE. Past and Present of Electrochemical Sensors and Methods for Amphenicol Antibiotic Analysis. MICROMACHINES 2022; 13:mi13050677. [PMID: 35630144 PMCID: PMC9143398 DOI: 10.3390/mi13050677] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 04/12/2022] [Accepted: 04/24/2022] [Indexed: 12/30/2022]
Abstract
Amphenicols are broad-spectrum antibiotics. Despite their benefits, they also present toxic effects and therefore their presence in animal-derived food was regulated. Various analytical methods have been reported for their trace analysis in food and environmental samples, as well as in the quality control of pharmaceuticals. Among these methods, the electrochemical ones are simpler, more rapid and cost-effective. The working electrode is the core of any electroanalytical method because the selectivity and sensitivity of the determination depend on its surface activity. Therefore, this review offers a comprehensive overview of the electrochemical sensors and methods along with their performance characteristics for chloramphenicol, thiamphenicol and florfenicol detection, with a focus on those reported in the last five years. Electrode modification procedures and analytical applications of the recently described devices for amphenicol electroanalysis in various matrices (pharmaceuticals, environmental, foods), together with the sample preparation methods were discussed. Therefore, the information and the concepts contained in this review can be a starting point for future new findings in the field of amphenicol electrochemical detection.
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Bao Y, Zhu D, Zhao Y, Li X, Gu C, Yu H. Selection and identification of high-affinity aptamer of Kunitz trypsin inhibitor and their application in rapid and specific detection. Food Sci Nutr 2022; 10:953-963. [PMID: 35282009 PMCID: PMC8907715 DOI: 10.1002/fsn3.2729] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 12/30/2021] [Accepted: 01/02/2022] [Indexed: 12/21/2022] Open
Abstract
Kunitz trypsin inhibitor (KTI), a harmful protein, seriously affects food hygiene and safety. Therefore, a sensitive, efficient, and rapid method for KTI detection is urgently needed. Aptamers are short and single-stranded (ss) DNA that recognize target molecules with high affinity. This work used graphene oxide-SELEX (GO-SELEX) to screen KTI aptamers. The positive and reverse screening was designed to ensure the high specificity and affinity of the selected aptamers. After 10 rounds of screening, multiple nucleic acid chains were obtained, and the chains were sequenced. Three aptamers with better affinity were obtained, and the values of the dissociation constant (K d) were calculated to be 52.6 nM, 22.7 nM, and 67.9 nM, respectively. Finally, a colorimetric aptamer biosensor based on gold nanoparticles (AuNPs) was constructed. The biosensor exhibited a broader linear range of 30-750 ng/ml, with a lower detection limit of 18 ng/ml, and the spiked recovery rate was between 98.2% and 103.3%. This experiment preliminary demonstrated the potential of the application of KTI aptamer in the real sample tests.
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Affiliation(s)
- Yunxiang Bao
- College of Food Science and EngineeringJilin Agricultural UniversityChangchunChina
| | - Dengzhao Zhu
- College of Food Science and EngineeringJilin Agricultural UniversityChangchunChina
| | - Yang Zhao
- College of Food Science and EngineeringJilin Agricultural UniversityChangchunChina
- Division of Soybean ProcessingSoybean Research & Development CenterChinese Agricultural Research SystemChangchunChina
| | - Xinzhu Li
- College of Food Science and EngineeringJilin Agricultural UniversityChangchunChina
| | - Chunmei Gu
- College of Food Science and EngineeringJilin Agricultural UniversityChangchunChina
| | - Hansong Yu
- College of Food Science and EngineeringJilin Agricultural UniversityChangchunChina
- Division of Soybean ProcessingSoybean Research & Development CenterChinese Agricultural Research SystemChangchunChina
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