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Chang H, Tan P, Chen X, Liu T, Lu Z, Sun M, Su G, Wang Y, Zou Y, Rao H, Wu C. Real-time intelligent detection of ethephon based on a high-throughput ratiometric fluorescent probe. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133156. [PMID: 38061128 DOI: 10.1016/j.jhazmat.2023.133156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Revised: 11/19/2023] [Accepted: 11/29/2023] [Indexed: 02/08/2024]
Abstract
Ethephon (ETH) is a common pesticide, and its overuse has resulted in a variety of health problems for humans. However, the existing ETH detection methods are tedious and time-consuming, and real-time ETH identification remains a significant difficulty. To mitigate this concern, a dual-emission ratiometric fluorescent probe Ru@ZrMOF was rationally synthesized for the detection of ETH. In the presence of ETH, the emission peak at 435 nm gradually increased, while the peak at 600 nm remained constant, accompanied by the fluorescence color change from red, pink, blue-violet to blue. The fluorescence intensity ratio (F435/F600) demonstrated two linear relations with the ETH concentration ranges at 3 - 50 μM and 50 - 500 μM, with a lowest detection limit at 1 μM. This was attributed to the formation of Zr-O-P bonds which attenuated the ligand-metal charge transfer (LMCT) process, resulting in the recovery of blue fluorescence of the ligand 2-Aminoterephthalic acid (2-APDC). To validate the practical application of the developed platform, a YOLO v5x-based WeChat applet "96 Speckles" was developed, and a 96-well plate and smartphone-embedded 3D-printed portable toolbox was designed for the real-time intelligent detection of ETH. This smart platform allows for real-time and efficient ETH analysis in various real samples including apples, pears and tomatoes.
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Affiliation(s)
- Hongrong Chang
- College of Science, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China
| | - Ping Tan
- College of Science, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China
| | - Xianjin Chen
- College of Information Engineering, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China
| | - Tao Liu
- College of Information Engineering, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China
| | - Zhiwei Lu
- College of Science, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China
| | - Mengmeng Sun
- College of Science, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China
| | - Gehong Su
- College of Science, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China
| | - Yanying Wang
- College of Science, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China
| | - Yuanfeng Zou
- College of Veterinary Medicine, Sichuan Agricultural University, Huimin Road, Wenjiang District, Chengdu 611130, China
| | - Hanbing Rao
- College of Science, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China.
| | - Chun Wu
- College of Science, Sichuan Agricultural University, Xinkang Road, Yucheng District, Ya'an 625014, China.
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Ji C, Tang X, Wen R, Xu C, Wei J, Han B, Wu L. A Multienzyme Reaction-Mediated Electrochemical Biosensor for Sensitive Detection of Organophosphorus Pesticides. BIOSENSORS 2024; 14:62. [PMID: 38391981 PMCID: PMC10886554 DOI: 10.3390/bios14020062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 01/20/2024] [Accepted: 01/22/2024] [Indexed: 02/24/2024]
Abstract
Ethephon (ETH), a commonly employed growth regulator, poses potential health risks due to its residue in fruits and vegetables, leading to both acute and subchronic toxicity. However, the detection accuracy of ETH is compromised by the color effects of the samples during the detection process. In this work, a multienzyme reaction-mediated electrochemical biosensor (MRMEC) was developed for the sensitive, rapid, and color-interference-resistant determination of ETH. Nanozymes Fe3O4@Au-Pt and graphene nanocomplexes (GN-Au NPs) were prepared as catalysts and signal amplifiers for MRMEC. Acetylcholinesterase (AChE), acetylcholine (ACh), and choline oxidase (CHOx) form a cascade enzyme reaction to produce H2O2 in an electrolytic cell. Fe3O4@Au-Pt has excellent peroxidase-like activity and can catalyze the oxidation of 3,3',5,5'-tetramethvlbenzidine (TMB) in the presence of H2O2, resulting in a decrease in the characteristic peak current of TMB. Based on the inhibitory effect of ETH on AChE, the differential pulse voltammetry (DPV) current signal of TMB was used to detect ETH, offering the limit of detection (LOD) of 2.01 nmol L-1. The MRMEC method effectively analyzed ETH levels in mangoes, showing satisfactory precision (coefficient of variations, 2.88-15.97%) and recovery rate (92.18-110.72%). This biosensor holds promise for detecting various organophosphorus pesticides in food samples.
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Affiliation(s)
- Chengzhen Ji
- Hainan Engineering Research Center of Aquatic Resources Efficient Utilization in South China Sea, Key Laboratory of Seafood Processing of Haikou, School of Food Science and Engineering, Hainan University, Haikou 570228, China; (C.J.); (X.T.); (C.X.)
| | - Xuemei Tang
- Hainan Engineering Research Center of Aquatic Resources Efficient Utilization in South China Sea, Key Laboratory of Seafood Processing of Haikou, School of Food Science and Engineering, Hainan University, Haikou 570228, China; (C.J.); (X.T.); (C.X.)
| | - Ruiming Wen
- Hainan Engineering Research Center of Aquatic Resources Efficient Utilization in South China Sea, Key Laboratory of Seafood Processing of Haikou, School of Food Science and Engineering, Hainan University, Haikou 570228, China; (C.J.); (X.T.); (C.X.)
| | - Chengdong Xu
- Hainan Engineering Research Center of Aquatic Resources Efficient Utilization in South China Sea, Key Laboratory of Seafood Processing of Haikou, School of Food Science and Engineering, Hainan University, Haikou 570228, China; (C.J.); (X.T.); (C.X.)
| | - Jing Wei
- Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Hainan Institute for Food Control, Haikou 570314, China;
| | - Bingjun Han
- Hainan Provincial Key Laboratory of Quality and Safety for Tropical Fruits and Vegetables, Analysis and Test Center, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China;
| | - Long Wu
- Hainan Engineering Research Center of Aquatic Resources Efficient Utilization in South China Sea, Key Laboratory of Seafood Processing of Haikou, School of Food Science and Engineering, Hainan University, Haikou 570228, China; (C.J.); (X.T.); (C.X.)
- Key Laboratory of Tropical Fruits and Vegetables Quality and Safety for State Market Regulation, Hainan Institute for Food Control, Haikou 570314, China;
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