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Yao H, Du S, Yang L, Ding Y, Shen H, Qiu Y, Dai G, Mo F. A magnetic graphene oxide and UiO-66 based homogeneous dual recognition electrochemical aptasensor for accurate and sensitive detection of aflatoxin B1. Talanta 2024; 273:125915. [PMID: 38522188 DOI: 10.1016/j.talanta.2024.125915] [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: 09/10/2023] [Revised: 01/27/2024] [Accepted: 03/11/2024] [Indexed: 03/26/2024]
Abstract
Aflatoxin (AFs) contamination is one of the serious food safety issues. Aflatoxin B1 (AFB1) is the most common and toxic aflatoxin, which has been classified as a class 1 carcinogen by the International Agency for Research on Cancer (IARC). It is extremely destructive to liver tissue. Developing a convenient and sensitive detection technique is essential. In this paper, we developed a homogeneous dual recognition strategy based electrochemical aptasensor for accurate and sensitive detection of aflatoxin B1 (AFB1) based on the magnetic graphene oxide (MGO) and UiO-66. The MGO was synthesized for the recognition and magnetic separation of AFB1 from complex samples. UiO-66/ferrocenecarboxylic acid (Fc)/aptamer composites were constructed as both recognition and signal probes. The probes would specifically capture AFB1 enriched by MGO, which enables dual recognition in homogeneous solution, thus further improving the accuracy of AFB1 detection. The electrochemical aptasensor for AFB1 had a linear range from 0.005 to 500 ng mL-1. Additionally, the limit of detection was 1 pg mL-1. It shows a favorable potential for both sensitive and accurate detection of AFB1 in real samples.
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Affiliation(s)
- Handong Yao
- Department of Naval Nutrition and Food Hygiene, Faculty of Naval Medicine, Naval Medical University, 800 Xiangyin Road, Shanghai, 200433, China; School of Engineering, Huzhou University, Huzhou, 313000, China
| | - Shuxin Du
- School of Engineering, Huzhou University, Huzhou, 313000, China
| | - Liuhong Yang
- Department of Naval Nutrition and Food Hygiene, Faculty of Naval Medicine, Naval Medical University, 800 Xiangyin Road, Shanghai, 200433, China; School of Health Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, China; Key Laboratory of Biosafety Defense (Naval Medical University), Ministry of Education, 800 Xiangyin Road, Shanghai, 200433, China
| | - Yifeng Ding
- Department of Naval Nutrition and Food Hygiene, Faculty of Naval Medicine, Naval Medical University, 800 Xiangyin Road, Shanghai, 200433, China; School of Health Science and Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, Shanghai, 200093, China; Key Laboratory of Biosafety Defense (Naval Medical University), Ministry of Education, 800 Xiangyin Road, Shanghai, 200433, China
| | - Hui Shen
- Department of Naval Nutrition and Food Hygiene, Faculty of Naval Medicine, Naval Medical University, 800 Xiangyin Road, Shanghai, 200433, China; Key Laboratory of Biosafety Defense (Naval Medical University), Ministry of Education, 800 Xiangyin Road, Shanghai, 200433, China
| | - Yi Qiu
- School of Engineering, Huzhou University, Huzhou, 313000, China
| | - Ge Dai
- Department of Naval Nutrition and Food Hygiene, Faculty of Naval Medicine, Naval Medical University, 800 Xiangyin Road, Shanghai, 200433, China; Key Laboratory of Biosafety Defense (Naval Medical University), Ministry of Education, 800 Xiangyin Road, Shanghai, 200433, China.
| | - Fengfeng Mo
- Department of Naval Nutrition and Food Hygiene, Faculty of Naval Medicine, Naval Medical University, 800 Xiangyin Road, Shanghai, 200433, China; Key Laboratory of Biosafety Defense (Naval Medical University), Ministry of Education, 800 Xiangyin Road, Shanghai, 200433, China.
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Singh S, Narasimhappa P, Uppara B, Behera SK, Varshney R, Naik TSSK, Khan NA, Singh J, C Ramamurthy P. Bio-engineered sensing of Atrazine by green CdS quantum dots: Evidence from electrochemical studies and DFT simulations. CHEMOSPHERE 2023; 345:140465. [PMID: 37866494 DOI: 10.1016/j.chemosphere.2023.140465] [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: 05/23/2023] [Revised: 10/03/2023] [Accepted: 10/14/2023] [Indexed: 10/24/2023]
Abstract
The present investigation reports a comprehensible and responsive strategy for identifying atrazine in several conditions using an extensive electrochemical method. CdS Quantum dots were synthesized via a greener approach, and their formation was endorsed by numerous characterization techniques such as FTIR, SEM, Raman, UV-Vis, and XRD. Owing to the splendid electrocatalytic behavior, Green CdS quantum dots (QDs) of crystallite size ∼2 nm was opted as the sensor material and were, therefore, incorporated on the bare carbon paste electrode's surface. The developed sensor demonstrated an impressive outcome for atrazine sensing accompanied by superior selectivity and sensitivity. The lower detection limit (LLOD) of 0.53 μM was attained using the developed sensor in a linear concentration range of 10-100 μM. Furthermore, the practical pertinence of the developed sensor was examined on distilled water, wastewater, and fresh liquid milk, resulting in a tremendous retrieval of atrazine (91.33-99.8%).
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Affiliation(s)
- Simranjeet Singh
- Interdisciplinary Centre for Water Research (ICWaR), Indian Institute of Science, Bengaluru, Karnataka, 560012, India
| | - Pavithra Narasimhappa
- Interdisciplinary Centre for Water Research (ICWaR), Indian Institute of Science, Bengaluru, Karnataka, 560012, India
| | - Basavaraju Uppara
- Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka, 560012, India
| | - Sushant K Behera
- Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka, 560012, India
| | - Radhika Varshney
- Interdisciplinary Centre for Water Research (ICWaR), Indian Institute of Science, Bengaluru, Karnataka, 560012, India
| | - T S Sunil Kumar Naik
- Department of Materials Engineering, Indian Institute of Science, Bengaluru, Karnataka, 560012, India
| | - Nadeem A Khan
- Interdisciplinary Research Center for Membranes and Water Security, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
| | - Joginder Singh
- Department of Botany, Nagaland University, Lumami, Nagaland, 798627, India
| | - Praveen C Ramamurthy
- Interdisciplinary Centre for Water Research (ICWaR), Indian Institute of Science, Bengaluru, Karnataka, 560012, India.
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Calcaterra A, Polli F, Lamelza L, Del Plato C, Cammarone S, Ghirga F, Botta B, Mazzei F, Quaglio D. Resorc[4]arene-Modified Gold-Decorated Magnetic Nanoparticles for Immunosensor Development. Bioconjug Chem 2023; 34:529-537. [PMID: 36753752 PMCID: PMC10020960 DOI: 10.1021/acs.bioconjchem.2c00605] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
Abstract
In recent years, several efforts have been made to develop selective, sensitive, fast response, and miniaturized immunosensors with improved performance for the monitoring and screening of analytes in several matrices, significantly expanding the use of this technology in a broad range of applications. However, one of the main technical challenges in developing immunosensors is overcoming the complexity of binding antibodies (Abs) to the sensor surface. Most immobilizing approaches lead to a random orientation of Abs, resulting in lower binding site density and immunoaffinity. In this context, supramolecular chemistry has emerged as a suitable surface modification tool to achieve the preorganization of artificial receptors and to improve the functional properties of self-assembled monolayers. Herein, a supramolecular chemistry/nanotechnology-based platform was conceived to develop sensitive label-free electrochemical immunosensors, by using a resorcarene macrocycle as an artificial linker for the oriented antibody immobilization. To this aim, a water-soluble bifunctional resorc[4]arene architecture (RW) was rationally designed and synthesized to anchor gold-coated magnetic nanoparticles (Au@MNPs) and to maximize the amount of the active immobilized antibody (Ab) in the proper "end-on" orientation. The resulting supramolecular chemistry-modified nanoparticles, RW@Au@MNPs, were deposited onto graphite screen printed electrodes which were then employed to immobilize three different Abs. Furthermore, an immunosensor for atrazine (ATZ) analysis was realized and characterized by the differential pulse voltammetry technique to demonstrate the validity of the developed biosensing platform as a proof of concept for electrochemical immunosensors. The RW-based immunosensor improved AbATZ loading on Au@MNPs and sensitivity toward ATZ by almost 1.5 times compared to the random platform. Particularly, the electrochemical characterization of the developed immunosensor displays a linearity range toward ATZ within 0.05-1.5 ng/mL, a limit of detection of 0.011 ng/ml, and good reproducibility and stability. The immunosensor was tested by analyzing spiked fortified water samples with a mean recovery ranging from 95.7 to 108.4%. The overall good analytical performances of this immunodevice suggest its application for the screening and monitoring of ATZ in real matrices. Therefore, the results highlighted the successful application of the resorc[4]arene-based sensor design strategy for developing sensitive electrochemical immunosensors with improved analytical performance and simplifying the Ab immobilization procedure.
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Polli F, D'Agostino C, Zumpano R, De Martino V, Favero G, Colangelo L, Minisola S, Mazzei F. ASu@MNPs-based electrochemical immunosensor for vitamin D3 serum samples analysis. Talanta 2023; 251:123755. [DOI: 10.1016/j.talanta.2022.123755] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 07/14/2022] [Accepted: 07/17/2022] [Indexed: 11/27/2022]
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