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Rageh AH, Said MI, Abdel-Aal FAM. Zirconium-based hydrophobic-MOFs as innovative electrode modifiers for flibanserin determination: Exploring the electrooxidation mechanism using a comprehensive spectroelectrochemical study. Mikrochim Acta 2024; 191:236. [PMID: 38570402 DOI: 10.1007/s00604-024-06297-1] [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: 11/20/2023] [Accepted: 03/03/2024] [Indexed: 04/05/2024]
Abstract
Three different types of Zr-based MOFs derived from benzene dicarboxylic acid (BDC) and naphthalene dicarboxylic acid as organic linkers (ZrBDC, 2,6-ZrNDC, and 1,4-ZrNDC) were synthesized. They were characterized using X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), Fourier-transform IR spectroscopy (FT-IR), and Transmission electron microscopy (TEM). Their hydrophilic/hydrophobic nature was investigated via contact angle measurements; ZrBDC MOF was hydrophilic and the other two (ZrNDC) MOFs were hydrophobic. The three MOFs were combined with MWCNTs as electrode modifiers for the determination of a hydrophobic analyte, flibanserin (FLB), as a proof-of-concept analyte. Under the optimized experimental conditions, a significant enhancement in the oxidation peak current of FLB was observed when utilizing 2,6-ZrNDC and 1,4-ZrNDC, being the highest when using 1,4-ZrNDC. Furthermore, a thorough investigation of the complex oxidation pathway of FLB was performed by carrying out simultaneous spectroelectrochemical measurements. Based on the obtained results, it was verified that the piperazine moiety of FLB is the primary site for electrochemical oxidation. The fabricated sensor based on 1,4-ZrNDC/MW/CPE showed an oxidation peak of FLB at 0.8 V vs Ag/AgCl. Moreover, it showed excellent linearity for the determination of FLB in the range 0.05 to 0.80 μmol L-1 with a correlation coefficient (r) = 0.9973 and limit of detection of 3.0 nmol L-1. The applicability of the developed approach was demonstrated by determination of FLB in pharmaceutical tablets and human urine samples with acceptable repeatability (% RSD values were below 1.9% and 2.1%, respectively) and reasonable recovery values (ranged between 97 and 103% for pharmaceutical tablets and between 96 and 102% for human urine samples). The outcomes of the suggested methodology can be utilized for the determination of other hydrophobic compounds of pharmaceutical or biological interest with the aim of achieving low detection limits of these compounds in various matrices.
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Affiliation(s)
- Azza H Rageh
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, 71526, Egypt.
| | - Mohamed I Said
- Department of Chemistry, Faculty of Science, Assiut University, Assiut, 71516, Egypt
| | - Fatma A M Abdel-Aal
- Department of Pharmaceutical Analytical Chemistry, Faculty of Pharmacy, Assiut University, Assiut, 71526, Egypt
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2
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Chaudhari SS, Patil PO, Bari SB, Khan ZG. A comprehensive exploration of tartrazine detection in food products: Leveraging fluorescence nanomaterials and electrochemical sensors: Recent progress and future trends. Food Chem 2024; 433:137425. [PMID: 37690141 DOI: 10.1016/j.foodchem.2023.137425] [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: 05/15/2023] [Revised: 08/29/2023] [Accepted: 09/04/2023] [Indexed: 09/12/2023]
Abstract
Azo dyes are widely used as food coloring agents because of their affordability and stability. Examples include brilliant blue, carmoisine, sunset yellow, allura red, and tartrazine (Tar), etc. Notably, Tar is often utilized in hazardous food goods. They are frequently flavoured and combined with food items, raising the likelihood and danger of exposure. Therefore, detecting Tar in food is crucial to prevent health risks. Fluorescence nanomaterials and electrochemical sensors, known for their high sensitivity, affordability, simplicity, and speed, have been widely adopted by researchers for Tar detection. This comprehensive paper delves into the detection of Tar in food products. It extensively covers the utilization of advanced carbon-based nanomaterials, including CDs, doped CDs, and functionalized CDs, for sensitive Tar detection. Additionally, the paper explores the application of electrochemical sensors. The paper concludes by addressing current challenges and prospects, emphasizing efforts to enhance sensitivity, and selectivity for improved food safety.
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Affiliation(s)
- Sharayu S Chaudhari
- Department of Quality Assurance, H. R. Patel Institute of Pharmaceutical Education and Research Shirpur, Dist. Dhule, Maharashtra 425 405, India
| | - Pravin O Patil
- Department of Pharmaceutical Chemistry, H. R. Patel Institute of Pharmaceutical Education and Research Shirpur, Dist. Dhule, Maharashtra 425 405, India
| | - Sanjaykumar B Bari
- Department of Pharmaceutical Chemistry, H. R. Patel Institute of Pharmaceutical Education and Research Shirpur, Dist. Dhule, Maharashtra 425 405, India
| | - Zamir G Khan
- Department of Pharmaceutical Chemistry, H. R. Patel Institute of Pharmaceutical Education and Research Shirpur, Dist. Dhule, Maharashtra 425 405, India.
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3
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Oliveira LC, Rocha DS, Silva-Neto HA, Silva TAC, Coltro WKT. Polyester resin and graphite flakes: turning conductive ink to a voltammetric sensor for paracetamol sensing. Mikrochim Acta 2023; 190:324. [PMID: 37493852 DOI: 10.1007/s00604-023-05914-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Accepted: 07/13/2023] [Indexed: 07/27/2023]
Abstract
The development of a disposable electrochemical paper-based analytical device (ePAD) is described using a novel formulation of conductive ink that combines graphite powder, polyester resin, and acetone. As a proof of concept, the proposed sensor was utilized for paracetamol (PAR) sensing. The introduced ink was characterized via morphological, structural, and electrochemical analysis, and the results demonstrated appreciable analytical performance. The proposed ePAD provided linear behavior (R2 = 0.99) in the concentration range between 1 and 60 µmol L-1, a limit of detection of 0.2 µmol L-1, and satisfactory reproducibility (RSD ~ 7.7%, n = 5) applying a potential of + 0.81 V vs Ag at the working electrode. The quantification of PAR was demonstrated in different pharmaceutical formulations. The achieved concentrations revealed good agreement with the labeled values, acceptable accuracy (101% and 106%), and no statistical difference from the data obtained by HPLC at the 95% confidence level. The environmental impact of the new device was assessed using AGREE software, which determined a score of 0.85, indicating that it is eco-friendly. During the pharmacokinetic study of PAR, it was found that the drug has a maximum concentration of 23.58 ± 0.01 µmol L-1, a maximum time of 30 min, and a half-life of 2.15 h. These results are comparable to other studies that utilized HPLC. This suggests that the combination of graphite powder and polyester resin can transform conductive ink into an effective ePAD that can potentially be used in various pharmaceutical applications.
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Affiliation(s)
- Laísa C Oliveira
- Faculdade de Farmácia, Universidade Federal de Goiás, Goiânia, GO, 74605-170, Brazil
- Instituto de Química, Universidade Federal de Goiás, Goiânia, GO, 74690-900, Brazil
| | - Danielly S Rocha
- Instituto de Química, Universidade Federal de Goiás, Goiânia, GO, 74690-900, Brazil
| | - Habdias A Silva-Neto
- Instituto de Química, Universidade Federal de Goiás, Goiânia, GO, 74690-900, Brazil
| | - Thaísa A C Silva
- Instituto de Ciências Farmacêuticas, Goiânia, GO, 74175-100, Brazil
| | - Wendell K T Coltro
- Instituto de Química, Universidade Federal de Goiás, Goiânia, GO, 74690-900, Brazil.
- Instituto Nacional de Ciência E Tecnologia de Bioanalítica, Campinas, SP, 13084-971, Brazil.
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de Lima LF, Lopes Ferreira A, Martinez de Freitas ADS, de Souza Rodrigues J, Lemes AP, Ferreira M, de Araujo WR. Biodegradable and Flexible Thermoplastic Composite Graphite Electrodes: A Promising Platform for Inexpensive and Sensitive Electrochemical Detection of Creatine Kinase at the Point-of-Care. ACS APPLIED MATERIALS & INTERFACES 2023; 15:18694-18706. [PMID: 37014991 DOI: 10.1021/acsami.3c01379] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/19/2023]
Abstract
Acute myocardial infarction (AMI) is the main cause of death worldwide, and the time of diagnosis is decisive for the effectiveness of the treatment of patients with AMI. Creatine kinase-myocardial band (CK-MB) has a predominance and high affinity with myocardial tissue, making it considered one of the main biomarkers for the diagnosis of AMI. In this work, we report a novel biodegradable composite material based on a polymer blend of Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) and Poly(butylene adipate-co-terephthalate) (PHBV:Ecoflex) and graphite microparticles for sensitive and selective electrochemical detection of CK-MB. The morphological and physicochemical characterizations of the thermoplastic composite material revealed a homogeneous and synergistic distribution of the graphite microparticles through the blend structure, providing low defects and high electrical conductivity with high electron transfer kinetics (k0 = 3.54 × 10-3 cm s-1) features with adequate flexibility for point-of-care applications. The portable and disposable devices were applied to detect CK-MB using the electrochemical impedance spectroscopy (EIS) technique in a relevant clinical concentration ranging from 5.0 ng mL-1 to 100.0 ng mL-1 and presented a limit of detection of 0.26 ng mL-1 CK-MB. The selectivity of the sensor was confirmed by testing the potential interference of major biomolecules found in biofluids and other relevant macromolecules. The accuracy and robustness were assessed by addition and recovery protocol in urine and saliva samples without sample pretreatment and demonstrated the potential of our method for rapid and decentralized tests of AMI. In addition, the study of the thermal, biological, and photodegradation of the devices after being used was also carried out, aiming at the disposal of the material more sustainably.
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Affiliation(s)
- Lucas Felipe de Lima
- Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas (UNICAMP), 13083-970, Campinas, São Paulo, Brazil
| | - André Lopes Ferreira
- Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas (UNICAMP), 13083-970, Campinas, São Paulo, Brazil
| | - Amanda de Sousa Martinez de Freitas
- Polymers and Biopolymers Technology Lab. (TecPBio), Institute of Science and Technology (ICT), Federal University of São Paulo (UNIFESP), 12231-280, São José dos Campos, São Paulo, Brazil
| | - Jéssica de Souza Rodrigues
- Center of Science and Technology for Sustainability (CCTS), Federal University of São Carlos (UFSCar), 18052-780, Sorocaba, São Paulo, Brazil
| | - Ana Paula Lemes
- Polymers and Biopolymers Technology Lab. (TecPBio), Institute of Science and Technology (ICT), Federal University of São Paulo (UNIFESP), 12231-280, São José dos Campos, São Paulo, Brazil
| | - Marystela Ferreira
- Center of Science and Technology for Sustainability (CCTS), Federal University of São Carlos (UFSCar), 18052-780, Sorocaba, São Paulo, Brazil
| | - William Reis de Araujo
- Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas (UNICAMP), 13083-970, Campinas, São Paulo, Brazil
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5
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Rodrigues JS, de Freitas ADSM, Maciel CC, Guizani C, Rigo D, Ferreira M, Hummel M, Balakshin M, Botaro VR. Selected Kraft lignin fractions as precursor for carbon foam: Structure-performance correlation and electrochemical applications. Int J Biol Macromol 2023; 240:124460. [PMID: 37076061 DOI: 10.1016/j.ijbiomac.2023.124460] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 03/23/2023] [Accepted: 04/11/2023] [Indexed: 04/21/2023]
Abstract
The rapid exhaustion of fossil fuels brings to the fore the need to search for energy efficient strategies. The conversion of lignin into advanced functional carbon-based materials is considered one of the most promising solutions for environmental protection and the use of renewable resources. This study analyzed the structure-performance correlation of carbon foams (CF) when lignin-phenol-formaldehyde (LPF) resins produced with different fractions of kraft lignin (KL) were employed as carbon source, and polyurethane foam (PU) as sacrificial mold. The lignin fractions employed were KL, fraction of KL insoluble in ethyl acetate (LFIns) and fraction of KL soluble in ethyl acetate (LFSol). The produced CFs were characterized by thermogravimetric analysis (TGA), X-ray diffractometry (XRD), Raman spectroscopy, 2D HSQC Nuclear magnetic resonance (NMR) analysis, scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET), and electrochemical measurements. The results showed that when LFSol was employed as a partial substitute for phenol in LPF resin synthesis, the final performance of the produced CF was infinitely higher. The improved solubility parameters of LFSol along with the higher S/G ratio and β-O-4/α-OH content after fractionation were the key to produce CF with better carbon yields (54 %). The electrochemical measurements showed that LFSol presented the highest current density (2.11 × 10-4 mA.cm-2) and the lowest value of resistance to charge transfer (0.26 KΩ) in relation to the other samples, indicating that the process of electron transfer was faster in the sensor produced with LFSol. LFSol's potential for application as an electrochemical sensor was tested as a proof of concept and demonstrated excellent selectivity for the detection of hydroquinone in water.
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Affiliation(s)
- Jéssica S Rodrigues
- Science and Technology Center for Sustainability (CCTS), Federal University of São Carlos (UFSCar), João Leme dos Santos, km 110, 18052-780 Sorocaba, Brazil.
| | - Amanda De S M de Freitas
- Institute of Science and Technology (ICT), Federal University of São Paulo (UNIFESP), 12231-280 São José do Campos, SP, Brazil
| | - Cristiane C Maciel
- Science and Technology Institute of Sorocaba (ICTS), São Paulo State University (UNESP), Av. Três de Março, 511, 18087-180 Sorocaba, Brazil
| | - Chamseddine Guizani
- Biorefining Chemistry Team, VTT Technical Research Centre of Finland Ltd, Tietotie 2, P.O. Box 1000, FI-02044 VTT, Espoo, Finland; Department of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, 02150 Espoo, Finland
| | - Davide Rigo
- Department of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, 02150 Espoo, Finland
| | - Marystela Ferreira
- Science and Technology Center for Sustainability (CCTS), Federal University of São Carlos (UFSCar), João Leme dos Santos, km 110, 18052-780 Sorocaba, Brazil; Science and Technology Institute of Sorocaba (ICTS), São Paulo State University (UNESP), Av. Três de Março, 511, 18087-180 Sorocaba, Brazil
| | - Michael Hummel
- Department of Bioproducts and Biosystems, Aalto University, Vuorimiehentie 1, 02150 Espoo, Finland
| | - Mikhail Balakshin
- Science and Technology Center for Sustainability (CCTS), Federal University of São Carlos (UFSCar), João Leme dos Santos, km 110, 18052-780 Sorocaba, Brazil
| | - Vagner R Botaro
- Science and Technology Center for Sustainability (CCTS), Federal University of São Carlos (UFSCar), João Leme dos Santos, km 110, 18052-780 Sorocaba, Brazil
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6
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Paschoarelli MV, Kavai MS, de Lima LF, de Araujo WR. Laser-scribing fabrication of a disposable electrochemical device for forensic detection of crime facilitating drugs in beverage samples. Talanta 2023; 255:124214. [PMID: 36577326 DOI: 10.1016/j.talanta.2022.124214] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Revised: 12/19/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
A portable and disposable laser-scribed graphene (LSG) device was fabricated on polyetherimide (PEI) substrate for electrochemical detection of benzodiazepines (BZ) drugs such as diazepam (DZ) and midazolam (MZ) in commercial beverage samples. Morphological characterizations of the LSG material recorded by scanning electron microscopy (SEM) revealed the porous nature of the proposed electrochemical device, which contributed to the enhancement of the electroactive area. Besides, the structural and electrochemical characterizations performed by Raman spectroscopy, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) measurements revealed that the PEI-LSG material presents highly disordered graphene-like structures and high electron transfer features, respectively. The electrochemical detection of DZ and MZ was carried out by Square Wave Voltammetry (SWV), whose analytical curves exhibited two linear intervals in concentrations ranging from 2.5 μmol L-1 to 25.0 μmol L-1 and from 25.0 μmol L-1 to 100.0 μmol L-1 for both BZ. We obtained limits of detection (LOD) and quantification (LOQ) of 0.66 and 2.18 μmol L-1 for DZ and 0.61 μmol L-1 and 2.01 μmol L-1 for MZ, respectively. The developed sensor was applied to detect DZ and MZ in commercial beverages such as juice, whisky, and sugarcane spirit samples to mimic potential forensic evidence of drug-facilitated crimes. The recoveries ranged from 97.1% to 117.2% for DZ and from 92.2% to 114.3% for MZ. In addition, the proposed method presented high manufacturing reproducibility (relative standard deviation (RSD) = 2.18% for DZ and RSD = 3.82% for MZ, n = 8 sensors) and adequate selectivity, highlighting the potential of PEI-LSG sensor as an excellent alternative method for forensic detection of crime facilitating drugs in commercial beverage samples.
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Affiliation(s)
- Mayra V Paschoarelli
- Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil
| | - Mathias S Kavai
- Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil
| | - Lucas F de Lima
- Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil
| | - William R de Araujo
- Portable Chemical Sensors Lab, Department of Analytical Chemistry, Institute of Chemistry, State University of Campinas - UNICAMP, P.O. Box 6154, 13083-970, Campinas, SP, Brazil.
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7
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de Lima Tinoco MV, Fujii LR, Nicoliche CYN, Giordano GF, Barbosa JA, da Rocha JF, Dos Santos GT, Bettini J, Santhiago M, Strauss M, Lima RS. Scalable and green formation of graphitic nanolayers produces highly conductive pyrolyzed paper toward sensitive electrochemical sensors. NANOSCALE 2023; 15:6201-6214. [PMID: 36917005 DOI: 10.1039/d2nr07080d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
While pyrolyzed paper (PP) is a green and abundant material that can provide functionalized electrodes with wide detection windows for a plethora of targets, it poses long-standing challenges against sensing assays such as poor electrical conductivity, with resistivities generally higher than 200.0 mΩ cm (e.g., gold and silver show resistivities 1000-fold lower, ∼0.2 mΩ cm). In this regard, the fundamental hypothesis that drives this work is whether a scalable, cost-effective, and eco-friendly strategy is capable of significantly reducing the resistivity of PP electrodes toward the development of sensitive electrochemical sensors, whether faradaic or capacitive. We address this hypothesis by simply annealing PP under an isopropanol atmosphere for 1 h, reaching resistivities as low as 7 mΩ cm. Specifically, the annealing of PP at 800 or 1000 °C under isopropanol vapor leads to the formation of a highly graphitic nanolayer (∼15 nm) on the PP surface, boosting conductivity as the delocalization of π electrons stemming from carbon sp2 is favored. The reduction of carbonyl groups and the deposition of dehydrated isopropanol during the annealing process are hypothesized herein as the dominant PP graphitization mechanisms. Electrochemical analyses demonstrated the capability of the annealed PP to increase the charge-transfer kinetics, with the optimum heterogeneous standard rate constant being roughly 3.6 × 10-3 cm s-1. This value is larger than the constants reported for other carbon electrodes and indium tin oxide. Furthermore, freestanding fingers of the annealed PP were prototyped using a knife plotter to fabricate impedimetric on-leaf electrodes. These wearable sensors ensured the real-time and in situ monitoring of the loss of water content from soy leaves, outperforming non-annealed electrodes in terms of reproducibility and sensitivity. Such an application is of pivotal importance for precision agriculture and development of agricultural inputs. This work addresses the foundations for the achievement of conductive PP in a scalable, low-cost, simple, and eco-friendly way, i.e. without producing any liquid chemical waste, providing new opportunities to translate PP-based sensitive electrochemical devices into practical use.
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Affiliation(s)
- Marcos V de Lima Tinoco
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
| | - Lucas R Fujii
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
- Institute of Chemistry, University of Campinas, Campinas, São Paulo 13083-970, Brazil
| | - Caroline Y N Nicoliche
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
| | - Gabriela F Giordano
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
| | - Julia A Barbosa
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, São Paulo 13566-590, Brazil
| | - Jaqueline F da Rocha
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
- Center for Natural and Human Sciences, Federal University of ABC, Santo André, São Paulo 09210-580, Brazil
| | - Gabriel T Dos Santos
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
- Material Science, Federal University of Rio Grande do Sul, Porto Alegre, Rio Grande do Sul 90010-150, Brazil
| | - Jefferson Bettini
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
| | - Murilo Santhiago
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
- Center for Natural and Human Sciences, Federal University of ABC, Santo André, São Paulo 09210-580, Brazil
| | - Mathias Strauss
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
| | - Renato S Lima
- Brazilian Nanotechnology National Laboratory, Brazilian Center for Research in Energy and Materials, Campinas, São Paulo 13083-970, Brazil.
- Institute of Chemistry, University of Campinas, Campinas, São Paulo 13083-970, Brazil
- São Carlos Institute of Chemistry, University of São Paulo, São Carlos, São Paulo 13566-590, Brazil
- Center for Natural and Human Sciences, Federal University of ABC, Santo André, São Paulo 09210-580, Brazil
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Evaluation of an electrochemical sensor based on gold nanoparticles supported on carbon nanofibers for detection of tartrazine dye. J Solid State Electrochem 2023. [DOI: 10.1007/s10008-023-05438-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
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9
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Ahmadi S, Hasanzadeh M, Ghasempour Z. Sub-micro electrochemical recognition of carmoisine, sunset yellow, and tartrazine in fruit juices using P(β-CD/Arg)/CysA-AuNPs/AuE. Food Chem 2023; 402:134501. [DOI: 10.1016/j.foodchem.2022.134501] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/23/2022] [Accepted: 09/30/2022] [Indexed: 11/04/2022]
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10
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Rapid and straightforward electrochemical approach for the determination of the toxic food azo dye tartrazine using sensors based on silver solid amalgam. J Electroanal Chem (Lausanne) 2023. [DOI: 10.1016/j.jelechem.2023.117250] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
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11
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Ibraheem Shelash Al-Hawary S, Omar Bali A, Askar S, Lafta HA, Jawad Kadhim Z, Kholdorov B, Riadi Y, Solanki R, ismaeel kadhem Q, Fakri Mustafa Y. Recent advances in nanomaterials-based electrochemical and optical sensing approaches for detection of food dyes in food samples: A comprehensive overview. Microchem J 2023. [DOI: 10.1016/j.microc.2023.108540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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12
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Simultaneous square wave voltammetry detection of azo dyes using silver nanoparticles assembled on carbon nanofibers. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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13
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de Lima LF, de Araujo WR. Laser-scribed graphene on polyetherimide substrate: an electrochemical sensor platform for forensic determination of xylazine in urine and beverage samples. Mikrochim Acta 2022; 189:465. [DOI: 10.1007/s00604-022-05566-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 11/02/2022] [Indexed: 11/25/2022]
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14
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Peng X, Wang Y, Wang Q, Tang J, Zhang M, Yang X. Selective and sensitive detection of tartrazine in beverages by sulfur quantum dots with high fluorescence quantum yield. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 279:121454. [PMID: 35667140 DOI: 10.1016/j.saa.2022.121454] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 05/08/2022] [Accepted: 05/29/2022] [Indexed: 05/27/2023]
Abstract
In this work, sulfur quantum dots (TPA-SQDs) protected by terephthalic acid as a stabilizer were synthesized using a one-pot method. When excited at 310 nm, the synthesized TPA-SQDs solution emitted strong blue fluorescence at 428 nm, and the absolute quantum yield was as high as 85.99%. The proposed SQDs can be used as a fluorescent probe to specifically quench tartrazine (TZ), showing a good linear relationship (R2 = 0.996) at TZ concentrations of 0.1-20 μM, with a detection limit of 39 nM. By analysing the fluorescence lifetime, UV-Vis absorption spectrum and zeta potential of the assay system, it can be speculated that the fluorescence quenching mechanism of TZ on TPA-SQDs is the inner filter effect (IFE). The proposed method was applied to the detection of TZ in vitamin water and orange juice, and the results were consistent with the determination results by high-performance liquid chromatography. The recoveries and relative standard deviations were 93.2-102.6% and 1.34-2.88%, respectively, which provided an alternative method for the determination of TZ in beverages or other food samples.
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Affiliation(s)
- Xiaohui Peng
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, China
| | - Ya Wang
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, China.
| | - Qingying Wang
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, China
| | - Jiaojiao Tang
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, China
| | - Maosen Zhang
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, China
| | - Xiupei Yang
- College of Chemistry and Chemical Engineering, Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, China West Normal University, Nanchong 637000, China.
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15
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Lisboa TP, de Cássia Moreira B, Cunha de Souza C, Veríssimo de Oliveira WB, Costa Matos MA, Matos RC. A pencil graphite-based disposable device for electrochemical monitoring of sulfanilamide in honey and water samples. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:3867-3874. [PMID: 36129347 DOI: 10.1039/d2ay01137a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The present paper reports a simple, fast, and inexpensive process of manufacturing a disposable pencil graphite electrode (PGE) from widely available materials, which showed a reproducibility of at least 7.5%. The electrode was compared to the commercial glassy carbon electrode (GCE) and showed superior electroanalytical performance for sulfanilamide (SFA) with approximately 3.9-fold higher current density. Additionally, a displacement of the oxidation peak from approximately 80 mV to more cathodic regions was observed. Therefore, a method based on square wave voltammetry (SWV) was developed for the determination of the antimicrobial SFA in honey and tap water samples using the proposed sensor. The optimized method presented good detectability (LOD = 2.37 μmol L-1), with excellent precision and accuracy (relative standard deviation < 4.2%) and percent recovery from spiked samples ranging from 92 to 97%. In addition, the sensor did not suffer significant interference from sample matrix components and other commonly evaluated antimicrobials, which demonstrates the potential of these electrodes for implementation in routine analysis and quality control.
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Affiliation(s)
- Thalles Pedrosa Lisboa
- Departamento de Química, Universidade Federal de Juiz de Fora, 36026-900, Juiz de Fora-MG, Brazil.
| | - Bianca de Cássia Moreira
- Departamento de Química, Universidade Federal de Juiz de Fora, 36026-900, Juiz de Fora-MG, Brazil.
| | - Cassiano Cunha de Souza
- Departamento de Química, Universidade Federal de Juiz de Fora, 36026-900, Juiz de Fora-MG, Brazil.
| | | | | | - Renato Camargo Matos
- Departamento de Química, Universidade Federal de Juiz de Fora, 36026-900, Juiz de Fora-MG, Brazil.
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16
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Enhanced artificial intelligence for electrochemical sensors in monitoring and removing of azo dyes and food colorant substances. Food Chem Toxicol 2022; 169:113398. [PMID: 36096291 DOI: 10.1016/j.fct.2022.113398] [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: 05/25/2022] [Revised: 08/11/2022] [Accepted: 08/25/2022] [Indexed: 11/22/2022]
Abstract
It is necessary to determine whether synthetic dyes are present in food since their excessive use has detrimental effects on human health. For the simultaneous assessment of tartrazine and Patent Blue V, a novel electrochemical sensing platform was developed. As a result, two artificial azo colorants (Tartrazine and Patent Blue V) with toxic azo groups (-NN-) and other carcinogenic aromatic ring structures were examined. With a low limit of detection of 0.06 μM, a broad linear concentration range 0.09μM to 950μM, and a respectable recovery, scanning electron microscopy (SEM) was able to reveal the excellent sensing performance of the suggested electrode for patent blue V. The electrochemical performance of an electrode can be characterized using cyclic and differential pulse voltammetry, and electrochemical impedance spectroscopy. Moreover, the classification model was created by applying binary classification assessment using enhanced artificial intelligence comprises of support vector machine (SVM) and Genetic Algorithm (GA), respectively, a support vector machine and a genetic algorithm, which was then validated using the 50 dyes test set. The best binary logistic regression model has an accuracy of 83.2% and 81.1%, respectively, while the best SVM model has an accuracy of 90.3% for the training group of samples and 81.1% for the test group (RMSE = 0.644, R2 = 0.873, C = 205.41, and = 5.992). According to the findings, Cu-BTC MOF (copper (II)-benzene-1,3,5-tricarboxylate) has a crystal structure and is tightly packed with hierarchically porous nanomaterials, with each particle's edge measuring between 20 and 37 nm. The suggested electrochemical sensor's analytical performance is suitable for foods like jellies, condiments, soft drinks and candies.
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17
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Ibrahim H, Temerk Y. Surface decoration of functionalized carbon black nanoparticles with nanosized gold particles for electrochemical sensing of diuretic spironolactone in patient plasma. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Graphite sheets modified with poly(methylene blue) films: A cost-effective approach for the electrochemical sensing of the antibiotic nitrofurantoin. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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19
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Wu Q, Ji C, Zhang L, Shi Q, Wu Y, Tao H. A simple sensing platform based on a 1T@2H-MoS 2/cMWCNTs composite modified electrode for ultrasensitive detection of illegal Sudan I dye in food samples. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2022; 14:549-559. [PMID: 35048913 DOI: 10.1039/d1ay01775f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
The work presented here describes a highly sensitive and simple electrochemical sensor for the detection of Sudan I dye based on a nanocomposite made of MoS2 heterogeneous nanosheets (1T@2H-MoS2) and carboxylated carbon nanotubes (cMWCNTs) (1T@2H-MoS2/cMWCNTs). XPS results indicate that the content of 1T phase MoS2 was estimated to be 72% in 1T@2H-MoS2. Electron microscopy results show that the tubular cMWCNTs are uniformly interwoven in MoS2 nanosheets to form a three-dimensional network structure. Due to the synergistic electrocatalytic ability and high electroactive surface area, the 1T@2H-MoS2/cMWCNTs modified electrode demonstrated excellent analytical performance for Sudan I, including simple operation, good stability and a wide linear range from 5.00 × 10-9 to 2.00 × 10-6 mol L-1 and 2.00 × 10-6 to 1.00 × 10-4 mol L-1 with an ultra-low detection limit of 1.56 × 10-9 mol L-1. The recoveries of Sudan I from spiked real samples (chilli powder and ketchup) were in the range of 95.60% to 106.10% with low RSD (<5%), indicating that the 1T@2H-MoS2/cMWCNTs modified electrode is a promising tool for the analysis of illegal Sudan I in food samples.
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Affiliation(s)
- Qiaoling Wu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Chun Ji
- School of Pharmaceutical Sciences, Guizhou University, Guiyang 550025, China
| | - Lingli Zhang
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Qili Shi
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Yuangen Wu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Han Tao
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China.
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
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20
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Tao H, Liu F, Ji C, Wu Y, Wang X, Shi Q. A novel electrochemical sensing platform based on the esterase extracted from kidney bean for high-sensitivity determination of organophosphorus pesticides. RSC Adv 2022; 12:5265-5274. [PMID: 35425578 PMCID: PMC8981541 DOI: 10.1039/d1ra08129b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 02/06/2022] [Indexed: 11/21/2022] Open
Abstract
An electrochemical sensing platform using kidney bean esterase as a new detection enzyme was proposed for organophosphorus pesticide determination. The determination of trichlorfon can be easily achieved with a LOD as low as 3 ng L−1 (S/N = 3).
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Affiliation(s)
- Han Tao
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Feng Liu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Chun Ji
- School of Pharmaceutical Sciences, Guizhou University, Guiyang 550025, China
| | - Yuangen Wu
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Xiao Wang
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
| | - Qili Shi
- School of Liquor and Food Engineering, Guizhou University, Guiyang 550025, China
- Key Laboratory of Fermentation Engineering and Biopharmacy of Guizhou Province, Guizhou University, Guiyang 550025, China
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21
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Piper A, Öberg Månsson I, Khaliliazar S, Landin R, Hamedi MM. A disposable, wearable, flexible, stitched textile electrochemical biosensing platform. Biosens Bioelectron 2021; 194:113604. [PMID: 34488171 DOI: 10.1016/j.bios.2021.113604] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/25/2021] [Accepted: 08/28/2021] [Indexed: 11/30/2022]
Abstract
Wearable sensors are a fast growing and exciting research area, the success of smart watches are a great example of the utility and demand for wearable sensing systems. The current state of the art routinely uses expensive and bulky equipment designed for long term use. There is a need for cheap and disposable wearable sensors to make single use measurements, primarily in the area of biomarker detection. Herein we report the ability to make cheap (0.22 USD/sensor), disposable, wearable sensors by stitching conductive gold coated threads into fabrics. These threads are easily functionalised with thiolate self-assembled monolayers which can be designed for the detection of a broad range of different biomarkers. This all textile sensing platform is ideally suited to be scaled up and has the added advantage of being stretchable with insignificant effect on the electrochemistry of the devices. As a proof of principle, the devices have been functionalised with a continuous glucose sensing system which was able to detect glucose in human sweat across the clinically relevant range (0.1-0.6 mM). The sensors have a sensitivity of 126 ± 14 nA/mM of glucose and a limit of detection of 301 ± 2 nM. This makes them ideally suited for biomarker detection in point-of-care sensing applications.
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Affiliation(s)
- Andrew Piper
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, Stockholm, 10044, Sweden.
| | - Ingrid Öberg Månsson
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, Stockholm, 10044, Sweden
| | - Shirin Khaliliazar
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, Stockholm, 10044, Sweden
| | - Roman Landin
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, Stockholm, 10044, Sweden
| | - Mahiar Max Hamedi
- Department of Fibre and Polymer Technology, KTH Royal Institute of Technology, Teknikringen 56, Stockholm, 10044, Sweden.
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22
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Yang X, Zhao P, Xie Z, Ni M, Wang C, Yang P, Xie Y, Fei J. Selective determination of epinephrine using electrochemical sensor based on ordered mesoporous carbon / nickel oxide nanocomposite. Talanta 2021; 233:122545. [PMID: 34215048 DOI: 10.1016/j.talanta.2021.122545] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 05/16/2021] [Accepted: 05/19/2021] [Indexed: 11/26/2022]
Abstract
A nanocomposite of ordered mesoporous carbon/nickel oxide (OMC-NiO) was synthesized by hard-templating method. The nanocomposite remained ordered mesostructure and high surface area with the NiO nanocrystals embedded in the wall of the OMC. A sensitive sensor for electrochemical detection of epinephrine (EP) was developed with GCE modified by OMC-NiO nanocomposite. Cyclic voltammogram (CV) and differential pulse voltammetry (DPV) were used as the techniques to explore the electrochemical behavior of EP on OMC-NiO/GCE surface. The result showed that the electrode demonstrated better electrocatalytic performance to EP compared to that seen at OMC/GCE. Under the optimum condition, DPV measurements of the electrode response displayed a linear detection range for 8.0 × 10-7 to 5.0 × 10-5 M with a detection limit of 8.5 × 10-8 M (S/N = 3). It is worth noting that the electrocatalytic redox mechanism of EP on the electrode have studied through experiments and calculations (cyclic voltammetry and molecular electrostatic potential distribution). Moreover, the electrocatalytic behavior for the oxidation of EP and uric acid (UA) on OMC-NiO/GCE surface was investigated. The result showed that the sensor can be used to selectively determinate EP in the presence of an excesses of UA. Finally, the developed sensor was successfully applied to the determination of EP in spiked human blood serum and EP injection with satisfactory results.
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Affiliation(s)
- Xiao Yang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, People's Republic of China; Hunan Fisheries Science Institute, Changsha, 410153, People's Republic of China
| | - Pengcheng Zhao
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, People's Republic of China.
| | - Zhonggui Xie
- Hunan Fisheries Science Institute, Changsha, 410153, People's Republic of China
| | - Meijun Ni
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, People's Republic of China
| | - Chenxi Wang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, People's Republic of China; Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Xiangtan University, Xiangtan, 411105, People's Republic of China
| | - Pingping Yang
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, People's Republic of China
| | - Yixi Xie
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Xiangtan University, Xiangtan, 411105, People's Republic of China
| | - Junjie Fei
- Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan, 411105, People's Republic of China; Hunan Institute of Advanced Sensing and Information Technology, Xiangtan University, Xiangtan, 411105, People's Republic of China.
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23
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Zhu X, Liu Z, Li J, Li Z, Si F, Yang H, Kong J. Dual signal amplification based on polysaccharide-initiated ring-opening polymerization and click polymerization for exosomes detection. Talanta 2021; 233:122531. [PMID: 34215034 DOI: 10.1016/j.talanta.2021.122531] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Revised: 05/11/2021] [Accepted: 05/13/2021] [Indexed: 12/24/2022]
Abstract
Exosomes, as a biomarker with enhancing tumor invasion and spread, play an essential role for lung cancer diagnosis, therapy, and prognosis. In this work, a novel electrochemical sensor was fabricated for detecting exosomes secreted by lung cancer cells based on polysaccharide-initiated ring-opening polymerization (ROP) and click polymerization. First, MPA formed a self-assembled monolayer on the gold electrode surface, and then anti-EGFR was immobilized on the electrode surface by amide bond. Subsequently, a lot of phosphate groups were introduced by the specific recognition between anti-EGFR and exosomes, then sodium alginate grafted Glycidyl propargyl ether (SA-g-GPE) prepared via ROP was attached to the exosomes through PO43-Zr4+-COOH coordination bond. After that, click polymerization was initiated by alkyne groups on the SA-g-GPE polymerization chain to realize highly sensitive detection of A549 exosomes. Under the optimum conditions, the fabricated sensor showed a good linear relationship between the logarithm of exosomes concentration and peak current in the range of 5 × 103 - 5 × 109 particles/mL, and the limit of detection (LOD) was as low as 1.49 × 102 particles/mL. In addition, this method had the advantages of high specificity, anti-interference, high sensitivity, simplicity, rapidity and green economy, which proposed a novel avenue for the detection of exosomes, and also had potential applications in early cancer diagnosis and biomedicine.
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Affiliation(s)
- Xin Zhu
- Pharmacy College, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China
| | - Zenghui Liu
- Pharmacy College, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China
| | - Jinge Li
- Pharmacy College, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China
| | - Zutian Li
- Pharmacy College, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China
| | - Fuchun Si
- Henan Key Laboratory of TCM Syndrome and Prescription in Signaling, Henan International Joint Laboratory of TCM Syndrome and Prescription in Signaling, Academy of Chinese Medical Sciences, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China.
| | - Huaixia Yang
- Pharmacy College, Henan University of Chinese Medicine, Zhengzhou, 450046, People's Republic of China.
| | - Jinming Kong
- School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing, 210094, People's Republic of China.
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