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Gu Y, Zhao T, Sun B, Zhang Y, Zhang Q, Xu G, Yu C. Integrated gold nanorods-based dual-signal platform for accurate total antioxidant capacity assessment in food samples. Talanta 2024; 280:126650. [PMID: 39128310 DOI: 10.1016/j.talanta.2024.126650] [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: 03/21/2024] [Revised: 07/24/2024] [Accepted: 07/30/2024] [Indexed: 08/13/2024]
Abstract
Accurate assessment of Total Antioxidant Capacity (TAC) in food is crucial for evaluating nutritional quality and potential health benefits. This study aims to enhance the sensitivity and reliability of TAC detection through a dual-signal method, combining colorimetric and photothermal signals. Gold nanorods (AuNRs) were utilized to establish a dual-signal method duo to the colorimetric and photothermal properties. Fenton reaction can etch the AuNRs from the tips, as a result, a blue shift in the longitudinal LSPR absorption peak was obtained, leading to significant changes in color and photothermal effects, facilitating discrimination through both visual observation and thermometer measurements. In the presence of antioxidants, the Fenton reaction was suppressed or inhibited, protecting the AuNRs from etching. The colorimetric and photothermal signals were therefore positively correlated with TAC levels, enabling dual-signal detection of TAC. The linear range of AA was 4-100 μM in both colorimetry and photothermal modes, with detection limits of 1.60 μM and 1.38 μM, respectively. This dual-signal approach achieves low detection limits, enhancing precision and sensitivity. The method thus has the potential to act as a promising candidate for TAC detection in food samples, contributing to improved food quality and safety assessment.
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Affiliation(s)
- Yuwei Gu
- College of Science, Hebei Agricultural University, Baoding, 071001, PR China
| | - Tengfei Zhao
- Lucky Healthcare Limited Liability Company, Baoding, 071054, PR China
| | - Bo Sun
- College of Mechanical and Electrical Engineering, Hebei Agricultural University, Baoding, 071001, PR China
| | - Yunyi Zhang
- College of Science, Hebei Agricultural University, Baoding, 071001, PR China.
| | - Qingfeng Zhang
- College of Science and Technology, Hebei Agricultural University, Cangzhou, 061100, Hebei, PR China.
| | - Guangcai Xu
- College of Science, Hebei Agricultural University, Baoding, 071001, PR China
| | - Cong Yu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022, PR China; University of Science and Technology of China, Hefei, 230026, PR China.
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Chu T, Liu Y, Gao Y, Zhou C, Huang W, Zheng Y. Colorimetric array sensor based on bimetallic nitrogen-doped carbon-based nanozyme material to detect multiple antioxidants. Mikrochim Acta 2024; 191:365. [PMID: 38831060 DOI: 10.1007/s00604-024-06444-8] [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: 03/19/2024] [Accepted: 05/18/2024] [Indexed: 06/05/2024]
Abstract
Copper-cobalt bimetallic nitrogen-doped carbon-based nanoenzymatic materials (CuCo@NC) were synthesized using a one-step pyrolysis process. A three-channel colorimetric sensor array was constructed for the detection of seven antioxidants, including cysteine (Cys), uric acid (UA), tea polyphenols (TP), lysine (Lys), ascorbic acid (AA), glutathione (GSH), and dopamine (DA). CuCo@NC with peroxidase activity was used to catalyze the oxidation of TMB by H2O2 at three different ratios of metal sites. The ability of various antioxidants to reduce the oxidation products of TMB (ox TMB) varied, leading to distinct absorbance changes. Linear discriminant analysis (LDA) results showed that the sensor array was capable of detecting seven antioxidants in buffer and serum samples. It could successfully discriminate antioxidants with a minimum concentration of 10 nM. Thus, multifunctional sensor arrays based on CuCo@NC bimetallic nanoenzymes not only offer a promising strategy for identifying various antioxidants but also expand their applications in medical diagnostics and environmental analysis of food.
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Affiliation(s)
- Tingting Chu
- Hubei Key Laboratory of Selenium Resources Research and Biological Applications, Hubei Minzu University, Enshi City, Hubei, China
- Institute of Selenium Science and Industry, Hubei Minzu University, Enshi City, Hubei, China
- School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi, 445000, China
| | - Yaopeng Liu
- Hubei Key Laboratory of Selenium Resources Research and Biological Applications, Hubei Minzu University, Enshi City, Hubei, China
- Institute of Selenium Science and Industry, Hubei Minzu University, Enshi City, Hubei, China
- School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi, 445000, China
| | - Yi Gao
- Hubei Key Laboratory of Selenium Resources Research and Biological Applications, Hubei Minzu University, Enshi City, Hubei, China
- Institute of Selenium Science and Industry, Hubei Minzu University, Enshi City, Hubei, China
- School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi, 445000, China
| | - Chengyu Zhou
- Hubei Key Laboratory of Selenium Resources Research and Biological Applications, Hubei Minzu University, Enshi City, Hubei, China
- Institute of Selenium Science and Industry, Hubei Minzu University, Enshi City, Hubei, China
- School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi, 445000, China
| | - Wensheng Huang
- School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi, 445000, China
| | - Yin Zheng
- Hubei Key Laboratory of Selenium Resources Research and Biological Applications, Hubei Minzu University, Enshi City, Hubei, China.
- Institute of Selenium Science and Industry, Hubei Minzu University, Enshi City, Hubei, China.
- School of Chemical and Environmental Engineering, Hubei Minzu University, Enshi, 445000, China.
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Li Y, Zhou W, Gao Y, Li X, Yuan L, Zhu G, Gu X, Yang Z. Nanozyme colourimetry based on temperate bacteriophage for rapid and sensitive detection of Staphylococcus aureus in food matrices. Int J Food Microbiol 2024; 416:110657. [PMID: 38452659 DOI: 10.1016/j.ijfoodmicro.2024.110657] [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: 10/31/2023] [Revised: 02/22/2024] [Accepted: 02/27/2024] [Indexed: 03/09/2024]
Abstract
Although bacteriophage-based biosensors are promising tools for rapid, convenient, and sensitive detection of Staphylococcus aureus in food products, the effect of biosensors using temperate phages as biorecognition elements to detect viable S. aureus isolates remains unclear. In this study, three temperate S. aureus phages were isolated and their biological features (one-step growth, host range, pH stability, temperature stability, and adsorption rate) were evaluated as the biological element. The selected phage SapYZUs8 was immobilized on the nanozyme Cu-MOF via electrostatic interactions to generate SapYZUs8@Cu-MOF, and its detection performance in real food (skim milk and pork) was then evaluated. Compared with phages SapYZUm7 and SapYZUs16, phage SapYZUs8 exhibited a broader host range, greater pH stability (3-12), and a better absorption rate (92 %, 8 min) suitable for S. aureus detection, which is likely the result of the DNA replication (DNA helicase) and phage tail protein genes in the SapYZUs8 genome. Therefore, phage SapYZUs8 was fixed on Cu-MOF to generate SapYZUs8@Cu-MOF, which exhibited good sensitivity and specificity for rapid colourimetric detection of viable S. aureus. The method took <0.5 h, and the detection limit was 1.09 × 102 CFU/mL. In addition, SapYZUs8@Cu-MOF was successfully employed for the colourimetric detection of S. aureus in food samples without interference from different food additives, NaCl concentrations, or pH values. With these benefits, it allows rapid visual assessment of S. aureus levels.
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Affiliation(s)
- Yajie Li
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Wenyuan Zhou
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, China.
| | - Yajun Gao
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Xuan Li
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Lei Yuan
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
| | - Guoqiang Zhu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Xuewen Gu
- Clinical Medical College, Yangzhou University, Yangzhou, Jiangsu 225009, China
| | - Zhenquan Yang
- College of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China
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Tao C, Jiang Y, Chu S, Miao Y, Zhang J, Lu Y, Niu L. Natural Enzyme-Inspired Design of the Single-Atom Cu Nanozyme as Dual-Enzyme Mimics for Distinguishing Total Antioxidant Capacity and the Ascorbic Acid Level. Anal Chem 2024. [PMID: 38221749 DOI: 10.1021/acs.analchem.3c05245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024]
Abstract
Although various oxidase mimetic or peroxidase (POD) mimetic nanozymes have been extensively studied, their poor substrate selectivity significantly inhibits their practical applications. Nanozymes with specific biomolecules as substrates, especially ascorbic acid oxidase (AAO) mimetic nanozymes with ascorbic acid (AA) as a substrate, have scarcely been studied. Herein, inspired by the multi-Cu atom sites and the redox electron transfer pathway of Cu2+/Cu+ in the natural AAO, atomically dispersed Cu sites immobilized on N-doped porous carbon (Cu-N/C) are artificially designed to simulate the function of natural AAO. Compared with their natural counterparts, the Cu-N/C catalysts exhibited higher catalytic efficiency and superior stability. Combined theoretical calculation and experimental characterizations reveal that the Cu-N/C nanozymes could catalyze the AA oxidation through a 2e- oxygen reduction pathway with H2O2 as the product. Moreover, the Cu-N/C nanozymes also possess high POD activity. As a proof-of-concept application, Cu-N/C can simultaneously realize AA detection in fluorescent mode based on its AAO activity and total antioxidant capacity detection in colorimetric mode utilizing its POD activity.
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Affiliation(s)
- Chenyu Tao
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Yuanyuan Jiang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Shushu Chu
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Yanrong Miao
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Jiqing Zhang
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Yizhong Lu
- School of Materials Science and Engineering, University of Jinan, Jinan 250022, China
| | - Li Niu
- School of Chemical Engineering and Technology, Sun Yat-sen University, Zhuhai 519082, China
- Center for Advanced Analytical Science, Guangzhou Key Laboratory of Sensing Materials and Devices, Guangdong Engineering Technology Research Center for Sensing Materials and Devices, School of Chemistry and Chemical Engineering, Guangzhou University, Guangzhou 510006, China
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