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do Nascimento WC, Ramo LB, da Silva FF, C U Araujo M, I E de Andrade S, Bichinho KM. One-step microwave-assisted synthesis of fluorescent carbon quantum dots for determination of ascorbic acid and riboflavin in vitamin supplements. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 321:124669. [PMID: 38909560 DOI: 10.1016/j.saa.2024.124669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 06/07/2024] [Accepted: 06/16/2024] [Indexed: 06/25/2024]
Abstract
The synthesis of carbon quantum dots (CQDs) using chemical precursors with different organic groups is a strategy to improve optical properties and expand applications in several fields of research such as Analytical Chemistry. Ascorbic acid and riboflavin are widely used in human food supplementation, making quality monitoring of these vitamin supplements relevant and necessary. In this work, disodium ethylenediaminetetraacetic, sodium thiosulfate and urea were applied to obtain CQDs through a single-step microwave-assisted synthesis. The CQDs were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray powder diffraction, infrared spectroscopy, zeta potential measurements, ultraviolet-visible spectroscopy and photoluminescence spectroscopy. The synthesized nanoparticles exhibited satisfactory and stable optical properties with luminescence at 430 nm, water solubility, and fluorescence quantum yield of 8.9 %. They were applied in the quantification of ascorbic acid and riboflavin in vitamin supplements. The fluorescence mechanisms observed were dynamic quenching for the CQDs/Cr(VI) sensor, followed by a return of fluorescence in the presence of ascorbic acid, and static quenching and inner filter effect in the interaction with riboflavin. Factorial designs 23 and 24 were used to optimize the analytical parameters. The CQDs/Cr(VI) sensor used in the determination of ascorbic acid, employing an on-off-on strategy, resulted in a linear range of 0.5 to 50 µg mL-1 and a limit of detection of 0.15 µg mL-1. The ratiometric fluorescence used in the determination of riboflavin resulted in a linear range of 0.1 to 7 µg mL-1 and a limit of detection of 0.09 µg mL-1. The analytical results for ascorbic acid were compared to the reference method of the Brazilian pharmacopeia, showing accuracy and precision according to the Brazilian Health Regulation Agency. Therefore, the synthesized CQDs were used to determine ascorbic acid and riboflavin in vitamin supplements, and the application of this nanomaterial can be expanded to different analytes and matrices, using simple and low-cost analysis techniques.
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Affiliation(s)
- Wallis C do Nascimento
- Universidade Federal Da Paraíba, Centro de Ciências Exatas e Da Natureza, Departamento de Química, 58051-900 João Pessoa, Paraíba, Brasil.
| | - Luciano B Ramo
- Universidade Federal Da Paraíba, Centro de Ciências Exatas e Da Natureza, Departamento de Química, 58051-900 João Pessoa, Paraíba, Brasil.
| | - Fausthon F da Silva
- Universidade Federal Da Paraíba, Centro de Ciências Exatas e Da Natureza, Departamento de Química, 58051-900 João Pessoa, Paraíba, Brasil.
| | - Mario C U Araujo
- Universidade Federal Da Paraíba, Centro de Ciências Exatas e Da Natureza, Departamento de Química, 58051-900 João Pessoa, Paraíba, Brasil.
| | - Stéfani I E de Andrade
- Universidade Federal Da Paraíba, Centro de Ciências Exatas e Da Natureza, Departamento de Química, 58051-900 João Pessoa, Paraíba, Brasil.
| | - Kátia M Bichinho
- Universidade Federal Da Paraíba, Centro de Ciências Exatas e Da Natureza, Departamento de Química, 58051-900 João Pessoa, Paraíba, Brasil.
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Singh D, Verma R, Singh KR, Srivastava M, Singh RP, Singh J. Biogenic synthesis of CuO/ZnO nanocomposite from Bauhinia variegate flower extract for highly sensitive electrochemical detection of vitamin B 2. BIOMATERIALS ADVANCES 2024; 161:213898. [PMID: 38796957 DOI: 10.1016/j.bioadv.2024.213898] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Revised: 02/29/2024] [Accepted: 05/15/2024] [Indexed: 05/29/2024]
Abstract
In this study, we report the preparation of bio-inspired binary CuO/ZnO nanocomposite (bb-CuO/ZnO nanocomposite) via the biological route using Bauhinia variegata flower extract following hydrothermal treatment. The prepared bb-CuO/ZnO nanocomposite was electrophoretically deposited (EPD) on indium tin oxide (ITO) substrate to develop bb-CuO/ZnO/ITO biosensing electrode which is employed for the determination of vitamin B2 (Riboflavin) through electrochemical techniques. Physicochemical assets of the prepared bb-CuO/ZnO nanocomposite have been extensively evaluated and make use of different characterization techniques including powder XRD, FT-IR, AFM, SEM, TEM, EDX, XPS, Raman, and TGA. Electrochemical characteristics of the bb-CuO/ZnO/ITO biosensing electrode have been studied towards vitamin B2 determination. Furthermore, different biosensing parameters such as response time, reusability, stability, interference, and real sample analysis were also estimated. From the linear plot of scan rate, charge transfer rate constant (Ks), surface concentration of electrode (γ), and diffusion coefficient (D) have been calculated, and these are found to be 6.56 × 10-1 s-1, 1.21 × 10-7 mol cm-2, and 6.99 × 10-3 cm2 s-1, respectively. This biosensor exhibits the linear range of vitamin B2 detection from 1 to 40 μM, including sensitivity and limit of detection (LOD) of 1.37 × 10-3 mA/μM cm2 and 0.254 μM, respectively. For higher concentration range detection linearity is 50-100 μM, with sensitivity and the LOD of 1.26 × 10-3 mA/μM cm2 and 0.145 μM, respectively. The results indicate that the bio-inspired nanomaterials are promising sustainable biosensing platforms for various food and health-based biosensing devices.
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Affiliation(s)
- Diksha Singh
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Rahul Verma
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Kshitij Rb Singh
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India
| | - Manish Srivastava
- Department of Chemical Engineering and Technology, Indian Institute of Technology (BHU) Varanasi, Uttar Pradesh 221005, India; Saveetha Institute of Medical and Technical Sciences, (Deemed to be University), Chennai, 600077, India
| | - Ravindra Pratap Singh
- Department of Biotechnology, Faculty of Science, Indira Gandhi National Tribal University, Amarkantak, Madhya Pradesh 484887, India
| | - Jay Singh
- Department of Chemistry, Institute of Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh 221005, India.
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Sheng L, Tan H, Zhu L, Liu K, Meng A, Li Z. In situ anchored ternary hierarchical hybrid nickel@cobaltous sulfide on poly(3,4-ethylenedioxythiophene)-reduced graphene oxide for highly efficient non-enzymatic glucose sensing. Mikrochim Acta 2024; 191:267. [PMID: 38627300 DOI: 10.1007/s00604-024-06317-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Accepted: 03/14/2024] [Indexed: 04/19/2024]
Abstract
A ternary hierarchical hybrid Ni@CoxSy/poly(3,4-ethylenedioxythiophene)-reduced graphene oxide (Ni@CoxSy/PEDOT-rGO) is rationally designed and in situ facilely synthesized as electrocatalyst to construct a binder-free sensing platform for non-enzymatic glucose monitoring through traditional electrodeposition procedure. The as-prepared Ni@CoxSy/PEDOT-rGO presents unique hierarchical structure and multiple valence states as well as strong and robust adhesion between Ni@CoxSy/PEDOT-rGO and GCE. Profiting from the aforementioned merits, the sensing platform constructed under optimal conditions achieved a wide detection range (0.2 μM ~ 2.0 mM) with high sensitivity (1546.32 μA cm-2 mM-1), a rapid response time (5 s), an ultralow detection limit (0.094 μM), superior anti-interference performance, excellent reproducibility and considerable stability. Furthermore, the sensor demonstrates an acceptable accuracy and appreciable recoveries ranging from 90.0 to 102.0% with less than 3.98% RSD in human blood serum samples, indicating the prospect of the sensor for the real samples analysis. It will provide a strategy to rationally design and fabricate ternary hierarchical hybrid as nanozyme for glucose assay.
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Affiliation(s)
- Liying Sheng
- College of Chemical Engineering, State Key Laboratory Base of Eco-Chemical Engineering, Qingdao University of Science and Technology, Shandong Province, Qingdao, 266042, China
| | - Hongtao Tan
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Shandong Province, Qingdao, 266042, China
| | - Licheng Zhu
- College of Chemical Engineering, State Key Laboratory Base of Eco-Chemical Engineering, Qingdao University of Science and Technology, Shandong Province, Qingdao, 266042, China
| | - Kexin Liu
- College of Chemical Engineering, State Key Laboratory Base of Eco-Chemical Engineering, Qingdao University of Science and Technology, Shandong Province, Qingdao, 266042, China
| | - Alan Meng
- College of Chemistry and Molecular Engineering, Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, State Key Laboratory Base of Eco-Chemical Engineering, Qingdao University of Science and Technology, Shandong Province, Qingdao, 266042, China.
| | - Zhenjiang Li
- College of Materials Science and Engineering, Qingdao University of Science and Technology, Shandong Province, Qingdao, 266042, China.
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uzun D, Tabanlıgil Calam T. Electrochemical Behavior and Ultrasensitive, Simple and Effective Voltammetric Determination of Acetaminophen Using Modified Glassy Carbon Electrode Based on 4‐Hydroxyquinoline‐3‐Carboxylic Acid. ELECTROANAL 2022. [DOI: 10.1002/elan.202200182] [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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Wang H, Mu W, Liu Y, Lu Y, Qiu Y, Ma Q. An innovative study on the "on-off-on" detection of sulfur ions based on a TSPP-riboflavin fluorescent probe. RSC Adv 2022; 12:5871-5877. [PMID: 35424537 PMCID: PMC8982097 DOI: 10.1039/d1ra08986b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Accepted: 02/08/2022] [Indexed: 11/30/2022] Open
Abstract
In this paper, 5,10,15,20-(4-sulphonatophenyl) porphyrin (TSPP) was synthesized by a facile route and used as a fluorescent probe to construct a sensor system based on the high water solubility and high quantum yield. It was found that when riboflavin (RF) was introduced into the TSPP solution, the fluorescence intensity of TSPP decreased for the peaks at 645 nm and 700 nm based on the principle of the electrostatic attractions and hydrophobic interactions between TSPP and riboflavin. When the fluorescence emission peak of riboflavin appeared at 550 nm, the fluorescence sensor system changed from the "on" state to the "off" state. When sulfur ions (S2-) were further introduced into the TSPP-riboflavin system, the fluorescence intensity of riboflavin was further decreased based on the specific reaction between S2- and riboflavin. However, the fluorescence signal of TSPP was restored and the fluorescence sensing system changed from the "off" state to the "on" state. Therefore, TSPP was used as a fluorescent probe to construct an "on-off-on" fluorescent sensing system, the linear range of S2- detected by this system is 5.0 × 10-9 to 3.6 × 10-5 M, and the detection limit (LOD) is 1.1 × 10-9 M. The sensing system has higher accuracy and sensitivity, and it can be successfully used in the sensing of S2- in real samples.
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Affiliation(s)
- Huan Wang
- Modern Tibetan Medicine Creation Engineering Technology Research Center of Qinghai Province, College of Pharmacy, Qinghai Nationalities University China
| | - Wencheng Mu
- Modern Tibetan Medicine Creation Engineering Technology Research Center of Qinghai Province, College of Pharmacy, Qinghai Nationalities University China
| | - Yuanyuan Liu
- Yinchuan City Center for Disease Control and Prevention Ningxia China
| | - Yongchang Lu
- Modern Tibetan Medicine Creation Engineering Technology Research Center of Qinghai Province, College of Pharmacy, Qinghai Nationalities University China
| | - Yuang Qiu
- Modern Tibetan Medicine Creation Engineering Technology Research Center of Qinghai Province, College of Pharmacy, Qinghai Nationalities University China
| | - Qin Ma
- Modern Tibetan Medicine Creation Engineering Technology Research Center of Qinghai Province, College of Pharmacy, Qinghai Nationalities University China
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Malathi S, Pakrudheen I, Kalkura SN, Webster T, Balasubramanian S. Disposable biosensors based on metal nanoparticles. SENSORS INTERNATIONAL 2022; 3:100169. [PMID: 35252890 PMCID: PMC8889882 DOI: 10.1016/j.sintl.2022.100169] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 02/28/2022] [Accepted: 03/01/2022] [Indexed: 02/06/2023] Open
Abstract
The coronavirus disease2019 (COVID-19) pandemic has highlighted the need for disposable biosensors that can detect viruses in infected patients quickly due to fast response and also at a low cost.The present review provides an overview of the applications of disposable biosensors based on metal nanoparticles in enzymatic and non-enzymatic sensors with special reference to glucose and H2O2, immunosensors as well as genosensors (DNA biosensors in which the recognized event consists of the hybridization reaction)for point-of-care diagnostics. The disposable biosensors for COVID19 have also been discussed.
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Affiliation(s)
- S. Malathi
- Crystal Growth Centre, Anna University, Guindy, Chennai, 600025, India
| | - I. Pakrudheen
- Department of Chemistry, CMR Institute of Technology, Bengaluru, 560037, Karnataka, India
| | | | - T.J. Webster
- Department of Chemical Engineering, Northeastern University, Boston, MA, 02115, USA
| | - S. Balasubramanian
- Department of Inorganic Chemistry, University of Madras, Guindy, Chennai, 600025, India,Corresponding author
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