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Maosong L, Yanxue G, Liang X, Dan L, Luxuan L, Yiming L, Jianglan Q. CdTe@ZnS quantum dots for rapid detection of organophosphorus pesticide in agricultural products. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 318:124451. [PMID: 38761472 DOI: 10.1016/j.saa.2024.124451] [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: 01/19/2024] [Revised: 04/22/2024] [Accepted: 05/10/2024] [Indexed: 05/20/2024]
Abstract
Organophosphorus pesticides (OPPs) constitute the most widely employed class of pesticides. However, the prevalent use of OPPs, while advantageous, raises concerns due to their toxicity, posing serious threats to food safety. Chemical sensors utilizing quantum dots (QDs) demonstrate promising applications in rapidly detecting OPPs residues, thereby facilitating efficient inspection of agricultural products. In this study, we employ an aqueous synthesis approach to prepare low toxic CdTe@ZnS QDs with stable fluorescence properties. To mitigate the risk of imprecise measurements stemming from the inherent susceptibility of fluorescence to quenching, we have adopted the principle of fluorescence resonance energy transfer (FRET) for the construction of the turn-on quantum dot sensor. With a detection limit for chlorpyrifos as low as 10 ppb (10 μg/L), the QDs sensor exhibits notable resistance to interference from various pesticides. Application of this system to detect organophosphorothioate pesticides in apples produced results consistent with those obtained from high-performance liquid chromatography (HPLC) detection, affirming the promising application prospects of this sensing system for the rapid detection of OPPs residues.
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Affiliation(s)
- Lin Maosong
- Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing 102206, China
| | - Guo Yanxue
- Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing 102206, China
| | - Xiang Liang
- Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing 102206, China
| | - Liang Dan
- Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing 102206, China
| | - Li Luxuan
- Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing 102206, China
| | - Li Yiming
- Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing 102206, China
| | - Qu Jianglan
- Key Laboratory of Urban Agriculture (North China), Ministry of Agriculture and Rural Affairs, Beijing University of Agriculture, Beijing 102206, China; Beijing Key Laboratory of Detection and Control of Spoilage Microorganisms and Pesticide Residues in Agricultural Products, Beijing University of Agriculture, Beijing 102206, China.
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Xie H, Zhou M, Cui X, Li C, Wu Y, Luo X, Yuan MS. A metal-complex based chemosensor for the detection of riboflavin and folate. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 304:123321. [PMID: 37678046 DOI: 10.1016/j.saa.2023.123321] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 07/22/2023] [Accepted: 08/31/2023] [Indexed: 09/09/2023]
Abstract
The vitamins of riboflavin and folate are necessary nutrients for maintaining the proper functioning of human body. Riboflavin and folate deficiency will cause nerve damage, leading to peripheral neuritis, depression, tongue inflammation and other diseases. The sensitive detection of riboflavin and folate keeps its significance for patients and food quality control. In this study, a quinoline-pyridine-combined chemosensor (HQ-TPE) modified by tetraphenylethene was developed. After chelating Cd2+, the chemosensor exhibited high selectivity and sensitivity for riboflavin and folate. Moreover, it can discriminate the two different vitamins through different fluorescent responses, which should arise from the different intermolecular π-π interactions between the sensor HQ-TPE and the analyte upon coordination of riboflavin or folate with Cd2+. More importantly, the chemosensor could be used in visual semi-quantitative determination of riboflavin and folate in real samples (milk and lettuce). Therefore, the sensor presented here will not only be a powerful tool for the detection of riboflavin and folate, but also provides a new template for the design of metal complex as fluorescent sensor.
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Affiliation(s)
- Haobo Xie
- College of Life Science, Northwest A&F University, Yangling 712100, PR China
| | - Mingu Zhou
- Institute of Water-saving Agriculture in Arid Area of China, Northwest A&F University, Yangling 712100, PR China
| | - Xiaorui Cui
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, PR China
| | - Chao Li
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, PR China
| | - Yongjun Wu
- College of Life Science, Northwest A&F University, Yangling 712100, PR China.
| | - Xinjuan Luo
- College of Life Science, Northwest A&F University, Yangling 712100, PR China.
| | - Mao-Sen Yuan
- College of Chemistry & Pharmacy, Northwest A&F University, Yangling 712100, PR China.
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Bardajee GR, Zamani M, Mahmoodian H, Elmizadeh H, Yari H, Jouyandeh L, Shirkavand R, Sharifi M. Capability of novel fluorescence DNA-conjugated CdTe/ZnS quantum dots nanoprobe for COVID-19 sensing. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 269:120702. [PMID: 34922287 PMCID: PMC8656256 DOI: 10.1016/j.saa.2021.120702] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 11/13/2021] [Accepted: 11/30/2021] [Indexed: 05/20/2023]
Abstract
Urgent identification of COVID-19 in infected patients is highly important nowadays. Förster or fluorescence resonance energy transfer (FRET) is a powerful and sensitive method for nanosensing applications, and quantum dots are essential materials in FRET-based nanosensors. The QDs are conjugated to DNA or RNA and used in many applications. Therefore, in the present study, novel fluorescence DNA-conjugated CdTe/ZnS quantum dots nanoprobe designed for detection of Covid-19 after extracting their RNA from saliva of hesitant people. For achieving this purpose, the water-soluble CdTe/ZnS QDs-DNA prepared via replacing the thioglycolic acid (TGA) on the surface of QDs with capture DNA (thiolated DNA) throw a ligand-exchange method. Subsequently, by adding the different concentrations of complementary (target DNA) in a mixture of quencher DNA (BHQ2-labeled DNA) and the QDs-DNA conjugates at different conditions, sandwiched hybrids were formed. The results showed that the fluorescence intensity was decreased with increasing the concentration of target DNA (as a positive control). The linear equation and regression (Y = 40.302 X + 1 and R2 = 0.98) were obtained by using the Stern-Volmer relationship. The Limit of detection (LOD) was determined 0.000823 µM. The achieved results well confirm the outcomes of the RT-PCR method in real samples.
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Affiliation(s)
| | - Mohammadreza Zamani
- Department of Plant Biotechnology, National Institute for Genetic Engineering and Biotechnology (NIGEB), P.O. Box 14155-6343, Tehran, Iran
| | - Hossein Mahmoodian
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran
| | - Hamideh Elmizadeh
- Legal Medicine Research Center, Legal Medicine Organization, Tehran, Iran
| | - Hadi Yari
- Medical Biotechnology Department, National Institute of Genetics Engineering and Biotechnology (NIGEB), Tehran, Iran
| | - Lavin Jouyandeh
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran
| | - Razieh Shirkavand
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran
| | - Mahdieh Sharifi
- Department of Chemistry, Payame Noor University, P.O. Box 19395-3697, Tehran, Iran
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Wang C, Zhang W, Qian J, Wang L, Ren Y, Wang Y, Xu M, Huang X. A FRET aptasensor for sensitive detection of aflatoxin B1 based on a novel donor-acceptor pair between ZnS quantum dots and Ag nanocubes. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:462-468. [PMID: 33438701 DOI: 10.1039/d0ay02017f] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Aflatoxin B1 (AFB1) is one of the most carcinogenic chemicals. A novel fluorescence resonance energy transfer (FRET) sensor based on aptamer recognition technology is proposed for the sensitive detection of AFB1 in moldy peanuts using Ag nanocubes as energy acceptors and ZnS quantum dots (QDs) as energy donors. Compared to the traditional FRET system based on an Au quencher, Ag nanocubes can not only quench the fluorescence of aptamer modified ZnS QDs, but are also inexpensive. In addition, compared with heavy metal QDs, ZnS QDs are environmentally friendly, have excellent photochemical properties, and are ideal energy donors. Without Ag nanocubes, the aptamer modified ZnS QDs emits blue fluorescence under an ultraviolet lamp. Because the emission spectrum of ZnS and the absorption spectrum of Ag nanocubes meet the requirements of FRET, the fluorescence quenching of ZnS QDs is realized. Nevertheless, with AFB1, the specific binding of aptamer and complementary chain makes the ZnS QDs break away from the Ag nanocubes, which leads to the fluorescence recovery of the ZnS QDs. Under the optimized detection conditions, the linear range of AFB1 was 5 pg mL-1 to 300 ng mL-1, and there was no obvious reaction with other similar mycotoxins. According to S/N = 3, the detection limit of AFB1 was 2.67 pg mL-1. The detection of AFB1 in peanut samples shows that the new FRET system can successfully be applied in the future to agricultural products.
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Affiliation(s)
- Chengquan Wang
- School of Food and Biological Engineering, Jiangsu University, Zhenjiang 212013, China.
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Electrochemical vitamin sensors: A critical review. Talanta 2021; 222:121645. [DOI: 10.1016/j.talanta.2020.121645] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Revised: 09/04/2020] [Accepted: 09/05/2020] [Indexed: 02/06/2023]
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Rotake D, Darji A, Kale N. Ultrasensitive detection of cadmium ions using a microcantilever-based piezoresistive sensor for groundwater. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2020; 11:1242-1253. [PMID: 32874824 PMCID: PMC7445416 DOI: 10.3762/bjnano.11.108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/04/2020] [Accepted: 07/29/2020] [Indexed: 06/11/2023]
Abstract
This paper proposes the selective and ultrasensitive detection of Cd(II) ions using a cysteamine-functionalized microcantilever-based sensor with cross-linked ᴅʟ-glyceraldehyde (DL-GC). The detection time for various laboratory-based techniques is generally 12-24 hours. The experiments were performed to create self-assembled monolayers (SAMs) of cysteamine cross-linked with ᴅʟ-glyceraldehyde on the microcantilever surface to selectively capture the targeted Cd(II). The proposed portable microfluidic platform is able to achieve the detection in 20-23 min with a limit of detection (LOD) of 0.56 ng (2.78 pM), which perfectly describes its excellent performance over other reported techniques. Many researchers used nanoparticle-based sensors for the detection of heavy metal ions, but daily increasing usage and commercialization of nanoparticles are rapidly expanding their deleterious effect on human health and the environment. The proposed technique uses a blend of thin-film and microcantilever (micro-electromechanical systems) technology, which mitigate the disadvantages of the nanoparticle approaches, for the selective detection of Cd(II) with a LOD below the WHO limit of 3 μg/L.
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Affiliation(s)
- Dinesh Rotake
- Department of Electronics Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
| | - Anand Darji
- Department of Electronics Engineering, Sardar Vallabhbhai National Institute of Technology, Surat, Gujarat, India
| | - Nitin Kale
- The Chief Technology Officer, NanoSniff Technologies Pvt. Ltd., F-14, 1st Floor, IITB Research Park, Old CSE Building, IIT Bombay, Powai, Mumbai – 76, India
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