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Wu H, Wang Q, Dong M, Liu X, Tang Y. pH-responsive dual-emission carbon dots for the ratiometric detection of organophosphorus pesticides in Brassica chinensis and Hg 2+ in water. Food Chem 2024; 454:139755. [PMID: 38810445 DOI: 10.1016/j.foodchem.2024.139755] [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: 02/07/2024] [Revised: 05/15/2024] [Accepted: 05/18/2024] [Indexed: 05/31/2024]
Abstract
Accurate and rapid monitoring of organophosphorus pesticides (OPs) residues is crucial for regulating food safety. Herein, dual-emission carbon dots (de-CDs) were fabricated for the ratiometric detection of OPs and Hg2+. The de-CDs exhibited two emission peaks at 678 and 485 nm when excited with visible light. Interestingly, the fluorescence at 678 nm was significantly quenched by Hg2+ mainly because of the static quenching effect, whereas that at 485 nm exhibited a slight change. More significantly, the quenched fluorescence of the de-CDs recovered remarkably after introducing omethoate, diazinon and malathion. Accordingly, the ratiometric detection of the three OPs and Hg2+ was achieved with high selectivity and robust performance. In addition, the OPs residues assay in Brassica chinensis was successfully performed with satisfactory results. This study not only provides an attractive tool for the simple and rapid assay of OPs but also offers new insights into the fabrication of multi-functional carbon dots.
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Affiliation(s)
- Huifang Wu
- Nantong Key Lab of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China.
| | - Qiqi Wang
- Nantong Key Lab of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China
| | - Miaochen Dong
- Nantong Key Lab of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China
| | - Xinyue Liu
- Nantong Key Lab of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China
| | - Yanfeng Tang
- Nantong Key Lab of Intelligent and New Energy Materials, School of Chemistry and Chemical Engineering, Nantong University, Nantong 226019, China.
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Han Y, Kong X, Gu Y, Bao R, Yi L, Liu L, Lan L, Gan Z, Yi J. Fluorescence sensor based on optimized quantum yield manganese-carbon polymer dots and smartphone-integrated sensing platform for tetracycline detection. Mikrochim Acta 2024; 191:141. [PMID: 38363372 DOI: 10.1007/s00604-024-06225-3] [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: 10/30/2023] [Accepted: 01/21/2024] [Indexed: 02/17/2024]
Abstract
The one-step synthesis of Mn-doped carbon quantum dots (Mn-CPDs) with a high quantum yield (QY = 45%) is reported using the microwave-assisted method. Subsequently, Mn-CPDs were successfully combined with Eu3+ ions to construct an Eu3+@Mn-CPDs fluorescence sensor. The presence of tetracycline (TC) induced a transition of fluorescence emission from blue (434 nm) to red (618 nm), and a robust linear relationship was observed between the ratio of F618 nm / F434 nm and the TC concentration (5 - 50 nmol/L), with a limit of detection (LOD) of 5.76 nmol/L. The underlying mechanism of Eu3+@Mn-CPDs and TC sensing is unveiled as a synergistic effect involving inner filter effect (IFE) and concurrent interactions. Notably, the smartphone-integrated sensing platform based on Eu3+@Mn-CPDs enables rapid and quantitative TC detection within a short time (< 30 s) by monitoring fluorescence color changes, achieving high-detection sensitivities (with a LOD of 6.18 nmol/L). This versatile and efficient sensing platform demonstrates its potential for the determination of TC concentrations in milk, honey, and tap water samples.
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Affiliation(s)
- Yushu Han
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Xin Kong
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
| | - Ying Gu
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Rui Bao
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China.
| | - Lunzhao Yi
- Faculty of Food Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Liang Liu
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Lin Lan
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Zhenfeng Gan
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
| | - Jianhong Yi
- Faculty of Material Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, China
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Li C, Liu L, Zhang D. Aggregation enhanced emissive orange carbon dots for information encryption and detection of Fe 3+ and tetracycline. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 305:123504. [PMID: 37866262 DOI: 10.1016/j.saa.2023.123504] [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] [Received: 07/21/2023] [Revised: 09/22/2023] [Accepted: 10/07/2023] [Indexed: 10/24/2023]
Abstract
In this study, N-doped fluorescent carbon dots with aggregation enhanced emission (N-CDs) were synthesized by a simple and rapid microwave-assisted method using o-phenylenediamine (OPD) and urea as raw materials and water as solvent. The fluorescence quantum yield of N-CDs was 20.64 %. N-CDs can be applied as invisible inks for message encryption. Furthermore, the fluorescence intensity of N-CDs can be quenched by Fe3+ and enhanced by tetracycline (TC). Therefore, two fluorescent probes were simultaneously designed in this study. Namely, "turn-off" fluorescence probe for Fe3+ and "turn-on" fluorescence probe for TC. The linear detection range of Fe3+ is from 1 to 70 μM, and detection limit is 0.1011 μM; the linear detection range of TC is from 0.1 to 10 μM, and the detection limit can be as low as 0.0555 μM. In this paper, the mutual interference between Fe3+ and TC was investigated for the first time. The detection of Fe3+ and TC was made more accurate by optimizing pH conditions and adding masking agent.
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Affiliation(s)
- Chunyan Li
- College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - Lei Liu
- College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China; Hebei Provincial Key Laboratory of Medicinal Molecular Chemistry - State Key Laboratory Breeding Base, Shijiazhuang 050018, China.
| | - Daohan Zhang
- College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China
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Zhou X, Fu S, Li J, Yi Y, Hu Y, Lu J, Yang C, Miao J, Xu Y. Smartphone-based pH responsive 3-channel colorimetric biosensor for non-enzymatic multi-antibiotic residues. Food Chem 2023; 429:136953. [PMID: 37499511 DOI: 10.1016/j.foodchem.2023.136953] [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: 04/12/2023] [Revised: 07/17/2023] [Accepted: 07/18/2023] [Indexed: 07/29/2023]
Abstract
Antibiotic residues in animal-derived food pose a risk to food safety and human health. Here, a smartphone-based pH-responsive 3-channel colorimetric biosensor is constructed for rapid detection of non-enzymatic multi-antibiotic residues in milk. In this system, a magnetic separation and enrichment approach is designed to specifically capture different antibiotic residues in complex environment. Indicators loaded on polydopamine-silver nanoparticles with excellently pH responsive visualization properties are utilized to ensure the high sensitivity of detection system. Moreover, smartphones are introduced to fulfill the demand for portable and on-site inspection of practical applications. It achieves simultaneous detection of oxytetracycline, kanamycin and streptomycin in the linear range of 1-105 pg/mL with detection limits of 0.085, 0.168, and 0.307 pg/mL, respectively. The practicality of the reported multi-antibiotic residues detection system is successfully demonstrated and evaluated challenging milk samples. Therefore, this system demonstrates the wide applications in multi-antibiotic residue analysis and food safety guarantee.
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Affiliation(s)
- Xiaotian Zhou
- Sanya Institute of Nanjing Agricultural University, MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Siyuan Fu
- Sanya Institute of Nanjing Agricultural University, MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiahua Li
- Sanya Institute of Nanjing Agricultural University, MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Yuhan Yi
- Sanya Institute of Nanjing Agricultural University, MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Yaqi Hu
- Sanya Institute of Nanjing Agricultural University, MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Ji Lu
- Sanya Institute of Nanjing Agricultural University, MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China
| | - Chao Yang
- Xidian University Hangzhou Institute of Technology, Hangzhou 311231, China
| | - Jinfeng Miao
- Sanya Institute of Nanjing Agricultural University, MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.
| | - Yuanyuan Xu
- Sanya Institute of Nanjing Agricultural University, MOE Joint International Research Laboratory of Animal Health and Food Safety, Key Laboratory of Animal Physiology & Biochemistry, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.
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Sun R, Liu P, Dong Y, Yang Q, Ma Y. A dual-mode green emissive fluorescent probe for real-time detection of doxycycline in milk using a smartphone sensing platform. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:6551-6560. [PMID: 37997770 DOI: 10.1039/d3ay01850d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2023]
Abstract
Real-time quantitative analysis of tetracyclines is urgently needed to provide consumers with early warning of potential risks. Herein, we report a dual-mode green emissive fluorescent probe, which refers to the liquid mode and the solid mode of electrospun films doped with nitride-doped carbon nanosheets (NCNSs) for real-time detection of doxycycline (DOX). Highly fluorescent NCNSs were prepared by low-temperature solid treatment of urea and sodium citrate. With the addition of DOX, the green emission intensity of NCNSs at 475 nm can be obviously reduced. Method validation exhibited a good linear relationship in 0.05-150 μM between the fluorescence quenching of NCNSs and the concentration of DOX with a limit of detection (LOD) of 0.0127 μM. Furthermore, the immobilization of NCNSs in PAN carriers forming electrospun films stabilizes the green fluorescence of NCNSs. Additionally, electrospun films integrated into a smartphone were developed for real-time detection of DOX with LOD of 0.285 μM. Additionally, DOX in milk was monitored with satisfactory recoveries. Therefore, the integration of the smartphone and electrospun film provides a promising and convenient method for real-time identification of DOX in food analysis.
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Affiliation(s)
- Ruiqing Sun
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China.
| | - Ping Liu
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China.
| | - Yingjia Dong
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China.
| | - Qingli Yang
- College of Food Science and Engineering, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China.
| | - Yongchao Ma
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao, 266109, People's Republic of China.
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Zhang X, Zhang L, Bie H, Xu J, Yuan Y, Jia L. Intelligent visual detection of OTC enabled by a multicolor fluorescence nanoprobe: Europium complex functionalized carbon dots. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 299:122867. [PMID: 37216821 DOI: 10.1016/j.saa.2023.122867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 04/10/2023] [Accepted: 05/10/2023] [Indexed: 05/24/2023]
Abstract
It is of great significance to realize ultra-sensitive and visual detection of oxytetracycline (OTC) residues, especially for public health and environmental safety. In this study, a multicolor fluorescence sensing platform (CDs-Cit-Eu) for OTC detection was constructed by using rare earth europium complex functionalized carbon dots (CDs). The blue-emitting CDs (λem = 450 nm) prepared by one-step hydrothermal method using nannochloropsis were not only the scaffold of Eu3+ ion coordination, but also the recognition unit of OTC. After adding OTC to the multicolor fluorescent sensor, the emission intensity of CDs decreased slowly, and the emission intensity of Eu3+ ions (λem = 617 nm) enhanced significantly, accompanying by a significant color change of the nanoprobe from blue to red. The detection limit of the probe for OTC was calculated to be 3.5 nM, manifesting ultra-high sensitivity towards OTC detection. In addition, OTC detection in real samples (honey, lake water, tap water) was successfully achieved. Moreover, a semi-hydrophobic luminescent film SA/PVA/CDs-Cit-Eu was also prepared for OTC detection. With the help of smartphone color recognition APP, real-time intelligent detection of OTC was realized.
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Affiliation(s)
- Xia Zhang
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, No. 2001 Shiji Road Jiaozuo, Henan 454000, China
| | - Lina Zhang
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, No. 2001 Shiji Road Jiaozuo, Henan 454000, China.
| | - Hongyan Bie
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, No. 2001 Shiji Road Jiaozuo, Henan 454000, China
| | - Jun Xu
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, No. 2001 Shiji Road Jiaozuo, Henan 454000, China
| | - Yingqi Yuan
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, No. 2001 Shiji Road Jiaozuo, Henan 454000, China
| | - Lei Jia
- College of Chemistry and Chemical Engineering, Henan Polytechnic University, No. 2001 Shiji Road Jiaozuo, Henan 454000, China.
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