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Tasić ŽZ, Petrović Mihajlović MB, Simonović AT, Radovanović MB, Antonijević MM. Recent Advances in Electrochemical Sensors for Caffeine Determination. SENSORS (BASEL, SWITZERLAND) 2022; 22:9185. [PMID: 36501886 PMCID: PMC9735645 DOI: 10.3390/s22239185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 11/22/2022] [Accepted: 11/23/2022] [Indexed: 06/17/2023]
Abstract
The determination of target analytes at very low concentrations is important for various fields such as the pharmaceutical industry, environmental protection, and the food industry. Caffeine, as a natural alkaloid, is widely consumed in various beverages and medicines. Apart from the beneficial effects for which it is used, caffeine also has negative effects, and for these reasons it is very important to determine its concentration in different mediums. Among numerous analytical techniques, electrochemical methods with appropriate sensors occupy a special place since they are efficient, fast, and entail relatively easy preparation and measurements. Electrochemical sensors based on carbon materials are very common in this type of research because they are cost-effective, have a wide potential range, and possess relative electrochemical inertness and electrocatalytic activity in various redox reactions. Additionally, these types of sensors could be modified to improve their analytical performances. The data available in the literature on the development and modification of electrochemical sensors for the determination of caffeine are summarized and discussed in this review.
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Gañán J, Martínez-García G, Morante-Zarcero S, Pérez-Quintanilla D, Sierra I. Nanomaterials-modified electrochemical sensors for sensitive determination of alkaloids: Recent trends in the application to biological, pharmaceutical and agri-food samples. Microchem J 2022. [DOI: 10.1016/j.microc.2022.108136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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3
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Wu L, Zhou S, Wang G, Yun Y, Liu G, Zhang W. Nanozyme Applications: A Glimpse of Insight in Food Safety. Front Bioeng Biotechnol 2021; 9:727886. [PMID: 34504834 PMCID: PMC8421533 DOI: 10.3389/fbioe.2021.727886] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 07/22/2021] [Indexed: 12/28/2022] Open
Abstract
Nanozymes own striking merits, including high enzyme-mimicking activity, good stability, and low cost. Due to the powerful and distinguished functions, nanozymes exhibit widespread applications in the field of biosensing and immunoassay, attracting researchers in various fields to design and engineer nanozymes. Recently, nanozymes have been innovatively used to bridge nanotechnology with analytical techniques to achieve the high sensitivity, specificity, and reproducibility. However, the applications of nanozymes in food applications are seldom reviewed. In this review, we summarize several typical nanozymes and provide a comprehensive description of the history, principles, designs, and applications of nanozyme-based analytical techniques in food contaminants detection. Based on engineering and modification of nanozymes, the food contaminants are classified and then discussed in detail via discriminating the roles of nanozymes in various analytical methods, including fluorescence, colorimetric and electrochemical assay, surface-enhanced Raman scattering, magnetic relaxing sensing, and electrochemiluminescence. Further, representative examples of nanozymes-based methods are highlighted for contaminants analysis and inhibition. Finally, the current challenges and prospects of nanozymes are discussed.
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Affiliation(s)
- Long Wu
- College of Food Science and Engineering, Hainan University, Haikou, China
- Key Laboratory of Fermentation Engineering (Ministry of Education), College of Bioengineering and Food, Hubei University of Technology, Wuhan, China
| | - Shuhong Zhou
- Key Laboratory of Fermentation Engineering (Ministry of Education), College of Bioengineering and Food, Hubei University of Technology, Wuhan, China
| | - Gonglei Wang
- School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, China
| | - Yonghuan Yun
- College of Food Science and Engineering, Hainan University, Haikou, China
| | - Guozhen Liu
- School of Life and Health Sciences, The Chinese University of Hong Kong, Shenzhen, China
| | - Weimin Zhang
- College of Food Science and Engineering, Hainan University, Haikou, China
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Maheshwaran S, Balaji R, Chen SM, Biswadeep R, Renganathan V, Narendhar C, Kao CR. Copper sulfide nano-globules reinforced electrodes for high-performance electrochemical determination of toxic pollutant hydroquinone. NEW J CHEM 2021. [DOI: 10.1039/d0nj05534d] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A high-performance electrochemical sensing platform based on CuS nano-globules is efficiently developed.
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Affiliation(s)
- Selvarasu Maheshwaran
- Department of Chemical Engineering and Biotechnology
- National Taipei University of Technology
- Taipei
- Republic of China
| | - Ramachandran Balaji
- Department of Chemical Engineering and Biotechnology
- National Taipei University of Technology
- Taipei
- Republic of China
| | - Shen-Ming Chen
- Department of Chemical Engineering and Biotechnology
- National Taipei University of Technology
- Taipei
- Republic of China
| | - Ray Biswadeep
- Department of Nanoscience
- Karunya Institute of Technology and Sciences
- Coimbatore
- India
| | - Vengudusamy Renganathan
- Department of Material Science and Engineering
- National Taiwan University
- Taipei
- Republic of China
| | - Chandrasekar Narendhar
- Department of Nanoscience and Technology
- Sri Ramakrishna Engineering College
- Coimbatore
- India
| | - C. R. Kao
- Department of Material Science and Engineering
- National Taiwan University
- Taipei
- Republic of China
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Venkadesh A, Mathiyarasu J, Radhakrishnan S. Voltammetric Sensing of Caffeine in Food Sample Using Cu‐MOF and Graphene. ELECTROANAL 2020. [DOI: 10.1002/elan.202060488] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- A. Venkadesh
- Electrodics and Electrocatalysis Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi 630 003 Tamilnadu India
- Academy of Scientific & Innovative Research (AcSIR) Ghaziabad 201 002 Uttar Pradesh India
| | - J. Mathiyarasu
- Electrodics and Electrocatalysis Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi 630 003 Tamilnadu India
- Academy of Scientific & Innovative Research (AcSIR) Ghaziabad 201 002 Uttar Pradesh India
| | - S. Radhakrishnan
- Electrodics and Electrocatalysis Division CSIR-Central Electrochemical Research Institute (CECRI) Karaikudi 630 003 Tamilnadu India
- Academy of Scientific & Innovative Research (AcSIR) Ghaziabad 201 002 Uttar Pradesh India
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6
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Hwa KY, Ganguly A, Tata SKS. Influence of temperature variation on spinel-structure MgFe2O4 anchored on reduced graphene oxide for electrochemical detection of 4-cyanophenol. Mikrochim Acta 2020; 187:633. [DOI: 10.1007/s00604-020-04613-z] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Accepted: 10/20/2020] [Indexed: 01/09/2023]
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7
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Balaji R, Zheng XH, Chen SM, Renganathan V. The copper oxide nanoflakes modified electrodes for selective and real time electrochemical sensing of caffeine. INORG CHEM COMMUN 2020. [DOI: 10.1016/j.inoche.2020.108014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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8
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Tu X, Xie Y, Gao F, Ma X, Lin X, Huang X, Qu F, Ping L, Yu Y, Lu L. Self-template synthesis of flower-like hierarchical graphene/copper oxide@copper(II) metal-organic framework composite for the voltammetric determination of caffeic acid. Mikrochim Acta 2020; 187:258. [DOI: 10.1007/s00604-020-04238-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 03/24/2020] [Indexed: 01/05/2023]
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Shehata M, Azab S, Fekry A. Facile caffeine electrochemical detection via electrodeposited Ag nanoparticles with modifier polymers on carbon paste sensor at aqueous and micellar media. CAN J CHEM 2020. [DOI: 10.1139/cjc-2019-0195] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The analysis and detection of caffeine (Caf) is very useful due to its widespread usage in several daily consumed beverages, food products, and pharmacological preparations with various physiological effects. The preparation of a newly electrodeposited Ag nanoparticles – cellulose acetate phthalate (CAP) – chitosan (Chit) modified carbon paste (ACCMCP) sensor for sensitive determination of Caf in 0.01 mol L−1 H3PO4 solution (pH 1.0–5.0) both in aqueous and micellar media (0.5 mmol L−1 SDS) was achieved. The interaction of Caf was monitored using electrochemical techniques such as cyclic voltammetry, differential pulse voltammetry, electrochemical impedance spectroscopy, and chronoamperometry, and surface characterization was carried out using X-ray diffraction, scanning electron microscope, and energy dispersive X-ray techniques. The linear detection range of Caf was between 4 and 500 μmol L−1 (r2 = 0.955) and the limit of detection obtained from the calibration plot was 0.252 μmol L−1. The sensor was applicable for detecting Caf in numerous real samples with recoveries from 98.03% to 101.60% without interference of any accompanying species, which ensures high method selectivity.
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Affiliation(s)
- M. Shehata
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
| | - S.M. Azab
- Pharmaceutical Chemistry Dept., National Organization for Drug Control and Research (NODCAR), Giza 29, Egypt
| | - A.M. Fekry
- Chemistry Department, Faculty of Science, Cairo University, Giza 12613, Egypt
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10
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Du C, Ma C, Gu J, Li L, Chen G. Fluorescence Sensing of Caffeine in Tea Beverages with 3,5-diaminobenzoic Acid. SENSORS 2020; 20:s20030819. [PMID: 32028737 PMCID: PMC7038766 DOI: 10.3390/s20030819] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Revised: 01/21/2020] [Accepted: 01/31/2020] [Indexed: 02/05/2023]
Abstract
A rapid, selective and sensitive method for the detection of caffeine in tea infusion and tea beverages are proposed by using 3,5-diaminobenzoic acid as a fluorescent probe. The 3,5-diaminobenzoic acid emits strong fluorescence around 410 nm under the excitation of light at 280 nm. Both the molecular electrostatic potential analysis and fluorescent lifetime measurement proved that the existence of caffeine can quench the fluorescence of 3,5-diaminobenzoic acid. Under the optimal experimental parameters, the 3,5-diaminobenzoic acid was used as a fluorescent probe to detect the caffeine aqueous solution. There exists a good linear relationship between the fluorescence quenching of the fluorescent probe and the concentration of caffeine in the range of 0.1–100 μM, with recovery within 96.0 to 106.2%, while the limit of detection of caffeine is 0.03 μM. This method shows a high selectivity for caffeine. The caffeine content in different tea infusions and tea beverages has been determined and compared with the results from HPLC measurement.
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Affiliation(s)
- Chenxu Du
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
| | - Chaoqun Ma
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
- Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Wuxi 214122, China
| | - Jiao Gu
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
- Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Wuxi 214122, China
| | - Lei Li
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
| | - Guoqing Chen
- School of Science, Jiangnan University, Wuxi 214122, China; (C.D.); (C.M.); (J.G.); (L.L.)
- Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology, Wuxi 214122, China
- Correspondence: ; Tel.: +86-139-0617-6695
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11
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Kant R. Surface plasmon resonance based fiber-optic nanosensor for the pesticide fenitrothion utilizing Ta 2O 5 nanostructures sequestered onto a reduced graphene oxide matrix. Mikrochim Acta 2019; 187:8. [PMID: 31797057 DOI: 10.1007/s00604-019-4002-8] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 11/03/2019] [Indexed: 02/03/2023]
Abstract
A surface plasmon resonance study was carried out for the identification and determination of the organophosphate pesticide fenitrothion via an optical fiber sensor. A thin layer of silver was deposited on the unclad core of silica optical fiber for plasmon generation. This was followed by the deposition of a sensing surface comprising a layer of tantalum(V) oxide nanoparticles sequestered in a nano-scaled matrix of reduced graphene oxide. The sensing mechanism is due to the interaction of fenitrothion with the silver film which leads to a change in refractive index.. Characterized by a wavelength interrogation scheme, the fiber-optic sensor exhibited a red shift equalling 56 nm corresponding to fenitrothion concentration in the range 0.25-4 μM including the blank solution. The spectral sensitivity is 24 nm μM-1, the limit of detection is 38 nM, and the response time is as short as 23 s. The sensor is selective, repeatable and works at ambient temperature. Graphical abstractSchematic representation of the sensing mechanism of an SPR based fiber-optic fenitrothion sensor utilizing modification in refractive index of sensing surface comprising of tantalum(V) oxide (Ta2O5) nanoparticles embedded in reduced graphene oxide (rGO) caused by interaction with fenitrothion entities.
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Affiliation(s)
- Ravi Kant
- Department of Physics, Indian Institute of Technology Delhi, Hauz Khas, New Delhi, 110016, India.
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12
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Petrucci R, Chiarotto I, Mattiello L, Passeri D, Rossi M, Zollo G, Feroci M. Graphene Oxide: A Smart (Starting) Material for Natural Methylxanthines Adsorption and Detection. Molecules 2019; 24:E4247. [PMID: 31766549 PMCID: PMC6930464 DOI: 10.3390/molecules24234247] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/12/2019] [Accepted: 11/18/2019] [Indexed: 12/12/2022] Open
Abstract
Natural methylxanthines, caffeine, theophylline and theobromine, are widespread biologically active alkaloids in human nutrition, found mainly in beverages (coffee, tea, cocoa, energy drinks, etc.). Their detection is thus of extreme importance, and many studies are devoted to this topic. During the last decade, graphene oxide (GO) and reduced graphene oxide (RGO) gained popularity as constituents of sensors (chemical, electrochemical and biosensors) for methylxanthines. The main advantages of GO and RGO with respect to graphene are the easiness and cheapness of synthesis, the notable higher solubility in polar solvents (water, among others), and the higher reactivity towards these targets (mainly due to - interactions); one of the main disadvantages is the lower electrical conductivity, especially when using them in electrochemical sensors. Nonetheless, their use in sensors is becoming more and more common, with the obtainment of very good results in terms of selectivity and sensitivity (up to 5.4 × 10-10 mol L-1 and 1.8 × 10-9 mol L-1 for caffeine and theophylline, respectively). Moreover, the ability of GO to protect DNA and RNA from enzymatic digestion renders it one of the best candidates for biosensors based on these nucleic acids. This is an up-to-date review of the use of GO and RGO in sensors.
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Affiliation(s)
- Rita Petrucci
- Dipartimento di Scienze di Base e Applicate per l’Ingegneria (SBAI), Sapienza University of Rome, via Antonio Scarpa, 14, 00161 Roma, Italy; (I.C.); (L.M.); (D.P.); (M.R.); (G.Z.)
| | | | | | | | | | | | - Marta Feroci
- Dipartimento di Scienze di Base e Applicate per l’Ingegneria (SBAI), Sapienza University of Rome, via Antonio Scarpa, 14, 00161 Roma, Italy; (I.C.); (L.M.); (D.P.); (M.R.); (G.Z.)
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13
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Karikalan N, Elavarasan M, Yang TCK. Effect of cavitation erosion in the sonochemical exfoliation of activated graphite for electrocatalysis of acebutolol. ULTRASONICS SONOCHEMISTRY 2019; 56:297-304. [PMID: 31101266 DOI: 10.1016/j.ultsonch.2019.04.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 04/10/2019] [Accepted: 04/10/2019] [Indexed: 06/09/2023]
Abstract
This study mainly covered the cavitation erosion in probe sonication and its electrochemical behavior. The activated graphite was exfoliated by the probe sonication wherein the titanium alloy (TA) is used as a probe (micro-tip). The sonication performed in the aqueous solution contains a mixture of sulfuric acid and nitric acid (1:1). The exfoliated graphite (EG) was examined by field emission scanning electron microscope, Raman and X-ray diffraction pattern analysis. The results showed that some TA particles dissolute from the TA micro-tip accompanied with graphite exfoliation. This dissolution experienced from the cavitation erosion, because the acoustic cavitation makes severe deformation on probe tips due to the bubble collapse. The dissolution rate increased when increasing sonication time; the resultant TA particles are randomly distributed over the EG. These EGTAs applied to the electrochemical oxidation of acebutolol which revealed an appreciable electrochemical performance and also exhibited better analytical performances to the electrochemical determinations. The obtained analytical parameters viz., sensitivity (0.234 µA µM-1 cm-2), linear range (0.01-15.1 µM), and limit of detection (0.003 µM) are highly comparable with the previous reports. Moreover, it has an acceptable tolerance with the interfering substances.
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Affiliation(s)
- Natarajan Karikalan
- Center for Precision Research and Analysis, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC.
| | - Munirathinam Elavarasan
- Semiconductor Materials Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC
| | - Thomas C K Yang
- Center for Precision Research and Analysis, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC; Semiconductor Materials Lab, Department of Chemical Engineering and Biotechnology, National Taipei University of Technology, No. 1, Section 3, Chung-Hsiao East Road, Taipei 106, Taiwan, ROC.
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14
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Recent progress in nanomaterial-based assay for the detection of phytotoxins in foods. Food Chem 2018; 277:162-178. [PMID: 30502132 DOI: 10.1016/j.foodchem.2018.10.075] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2018] [Revised: 09/03/2018] [Accepted: 10/14/2018] [Indexed: 12/22/2022]
Abstract
Phytotoxins refers to toxic chemicals derived from plants. They include both secondary metabolites that are dose-dependently toxic and allergens that can cause anaphylactic shock in sensitive individuals. Detecting phytotoxins in foods is increasingly important. Conventional methods for detecting phytotoxins lack sufficient sensitivity and operational convenience. Nanomaterial-based determination assays show great competence in fast and accurate sensing of trace substances. In the present review, representative phytotoxin categories of alkaloids, cyanides, and proteins are discussed. Application of notable nanomaterials, e.g. carbon nanotubes, graphene oxide, magnetic nanoparticles, metal-based nanotools, and quantum dots, in specific sensing strategies to fit the physiochemical properties of the target toxins are summarized. Nanomaterials mainly play four roles in phytotoxin detection: 1) analyte enricher; 2) sensor structure mediator; 3) target recognizer or reactant; 4) signaling agent. Great achievements have been made in the detection of trace plant-derived toxins in food matrices, yet there are still challenges awaiting further investigation.
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Redivo L, Stredanský M, De Angelis E, Navarini L, Resmini M, Švorc Ĺ. Bare carbon electrodes as simple and efficient sensors for the quantification of caffeine in commercial beverages. ROYAL SOCIETY OPEN SCIENCE 2018; 5:172146. [PMID: 29892400 PMCID: PMC5990824 DOI: 10.1098/rsos.172146] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Accepted: 03/27/2018] [Indexed: 06/08/2023]
Abstract
Food quality control is a mandatory task in the food industry and relies on the availability of simple, cost-effective and stable sensing platforms. In the present work, the applicability of bare glassy carbon electrodes for routine analysis of food samples was evaluated as a valid alternative to chromatographic techniques, using caffeine as test analyte. A number of experimental parameters were optimized and a differential pulse voltammetry was applied for quantification experiments. The detection limit was found to be 2 × 10-5 M (3σ criterion) and repeatability was evaluated by the relative standard deviation of 4.5%. The influence of sugars, and compounds structurally related to caffeine on the current response of caffeine was evaluated and found to have no significant influence on the electrode performance. The suitability of bare carbon electrodes for routine analysis was successfully demonstrated by quantifying caffeine content in seven commercially available drinks and the results were validated using a standard ultra-high performance liquid chromatography method. This work demonstrates that bare glassy carbon electrodes are a simple, reliable and cost-effective platform for rapid analysis of targets such as caffeine in commercial products and they represent therefore a competitive alternative to the existing analytical methodologies for routine food analysis.
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Affiliation(s)
- Luca Redivo
- Department of Chemistry and Biochemistry, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | | | | | | | - Marina Resmini
- Department of Chemistry and Biochemistry, School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
| | - Ĺubomír Švorc
- Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, Radlinského 9, Bratislava 812 37, Slovak Republic
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Li H, Ye L, Wang Y, Xie C. A glassy carbon electrode modified with hollow cubic cuprous oxide for voltammetric sensing of L-cysteine. Mikrochim Acta 2017; 185:5. [PMID: 29594497 DOI: 10.1007/s00604-017-2578-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 11/18/2017] [Indexed: 11/28/2022]
Abstract
This paper reports on an electrochemical sensing system for L-cysteine. It is based on the use of hollow cubic Cu2O particles that were prepared in two steps. First, the Cu2O/ polystyrene (PS) composites were prepared by a surface ion exchange strategy for in-situ reductive deposition on the surface of carboxy-capped PS particles. Thereafter, the PS particles were removed from the Cu2O/PS composites by treatment with tetrahydrofuran (THF). The resulting hollow cubic Cu2O particles were placed in a Nafion matrix on a glassy carbon electrode (GCE) which exhibits high surface area, good site accessibility and excellent electrocatalytic activity for L-cysteine. The cyclic voltammetric response of the modified GCE to L-cysteine is about 2.8-fold stronger than when using a GCE modified with pure Cu2O. The detection limit for L-cysteine is lower by about 1 order of magnitude, and the working voltage is rather low (-0.08 V vs. Ag/AgCl). An excellent electrochemical selectivity for L-cysteine over other amino acids was also achieved. The method was successfully applied to the determination of L-cysteine in pharmaceutical samples. Graphical abstract An electrochemical sensing system for the detection of L-cysteine in amino acid injections has been established by using the hollow cubic Cu2O particles as recognition element.
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Affiliation(s)
- Huaifen Li
- Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province, School of Materials and Chemical Engineering, West Anhui University, Lu'an, Anhui, 237012, China
| | - Lingling Ye
- Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province, School of Materials and Chemical Engineering, West Anhui University, Lu'an, Anhui, 237012, China
| | - Yanwei Wang
- Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province, School of Materials and Chemical Engineering, West Anhui University, Lu'an, Anhui, 237012, China
| | - Chenggen Xie
- Key Laboratory of Biomimetic Sensor and Detecting Technology of Anhui Province, School of Materials and Chemical Engineering, West Anhui University, Lu'an, Anhui, 237012, China.
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Synthesis of a nanocomposite consisting of Cu2O and N-doped reduced graphene oxide with enhanced electrocatalytic activity for amperometric determination of diethylstilbestrol. Mikrochim Acta 2017. [DOI: 10.1007/s00604-017-2452-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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18
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Shi R, Liang J, Zhao Z, Liu A, Tian Y. An electrochemical bisphenol A sensor based on one step electrochemical reduction of cuprous oxide wrapped graphene oxide nanoparticles modified electrode. Talanta 2017; 169:37-43. [DOI: 10.1016/j.talanta.2017.03.042] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2016] [Revised: 03/10/2017] [Accepted: 03/16/2017] [Indexed: 12/12/2022]
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19
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Kant R, Tabassum R, Gupta BD. Integrating nanohybrid membranes of reduced graphene oxide: chitosan: silica sol gel with fiber optic SPR for caffeine detection. NANOTECHNOLOGY 2017; 28:195502. [PMID: 28422746 DOI: 10.1088/1361-6528/aa6a9c] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Caffeine is the most popular psychoactive drug consumed in the world for improving alertness and enhancing wakefulness. However, caffeine consumption beyond limits can result in lot of physiological complications in human beings. In this work, we report a novel detection scheme for caffeine integrating nanohybrid membranes of reduced graphene oxide (rGO) in chitosan modified silica sol gel (rGO: chitosan: silica sol gel) with fiber optic surface plasmon resonance. The chemically synthesized nanohybrid membrane forming the sensing route has been dip coated over silver coated unclad central portion of an optical fiber. The sensor works on the mechanism of modification of dielectric function of sensing layer on exposure to analyte solution which is manifested in terms of red shift in resonance wavelength. The concentration of rGO in polymer network of chitosan and silica sol gel and dipping time of the silver coated probe in the solution of nanohybrid membrane have been optimized to extricate the supreme performance of the sensor. The optimized sensing probe possesses a reasonably good sensitivity and follows an exponentially declining trend within the entire investigating range of caffeine concentration. The sensor boasts of an unparalleled limit of detection value of 1.994 nM and works well in concentration range of 0-500 nM with a response time of 16 s. The impeccable sensor methodology adopted in this work combining fiber optic SPR with nanotechnology furnishes a novel perspective for caffeine determination in commercial foodstuffs and biological fluids.
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Affiliation(s)
- Ravi Kant
- Physics Department, Indian Institute of Technology Delhi, New Delhi 110016, India
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Velmurugan M, Karikalan N, Chen SM. Synthesis and characterizations of biscuit-like copper oxide for the non-enzymatic glucose sensor applications. J Colloid Interface Sci 2017; 493:349-355. [DOI: 10.1016/j.jcis.2017.01.044] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Revised: 01/11/2017] [Accepted: 01/12/2017] [Indexed: 11/30/2022]
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Nanocomposites of graphene and graphene oxides: Synthesis, molecular functionalization and application in electrochemical sensors and biosensors. A review. Mikrochim Acta 2016. [DOI: 10.1007/s00604-016-2007-0] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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