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Costa MH, Ferreira DTS, Pádua JES, Fernandes JPA, Santos JCC, Cunha FAS, Araujo MCU. A fast, low-cost, sensitive, selective, and non-laborious method based on functionalized magnetic nanoparticles, magnetic solid-phase extraction, and fluorescent carbon dots for the fluorimetric determination of copper in wines without prior sample treatment. Food Chem 2021; 363:130248. [PMID: 34144418 DOI: 10.1016/j.foodchem.2021.130248] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Revised: 05/24/2021] [Accepted: 05/28/2021] [Indexed: 10/21/2022]
Abstract
A new fluorimetric method for copper(II) determination in wines was developed combining functionalized magnetic nanoparticles (FMNP) and fluorescent carbon dots (FCD). To produce FMNP, Fe3O4 was coated with Al2O3 forming Fe3O4@Al2O3 core-shell magnetic nanoparticles and functionalized with PAN and SDS. FCD was synthesized from pineapple juice through hydrothermal carbonization. For copper determination, aliquots of wine, the FMNP dispersion, and Britton-Robinson buffer (pH = 4.0) were mixed under stirring to allow the adsorption of copper by FMNP. Cu-FMNP complex was attracted by a niobium magnet and, after discarding the non-magnetic material, the copper(II) ions were eluted with an FCD dispersion before fluorescence quenching measurements. The proposed method presented a linear range from 0.020 to 0.100 mg L-1 (r2 = 0.9953), RSD (intraday) < 3.0%, and recovery rates from 96 to 105 %. FMNP and FCD properties permitted extraction/preconcentration/determination of copper within 1 min with an enrichment factor of nine and without prior sample treatment.
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Affiliation(s)
- Matheus H Costa
- Universidade Federal da Paraíba, Departamento de Química, P.O. Box 5093, Zip Code 58051-970, João Pessoa, Paraíba, Brazil
| | - Danilo T S Ferreira
- Universidade Federal da Paraíba, Departamento de Química, P.O. Box 5093, Zip Code 58051-970, João Pessoa, Paraíba, Brazil
| | - Jonathan E S Pádua
- Universidade Federal da Paraíba, Departamento de Química, P.O. Box 5093, Zip Code 58051-970, João Pessoa, Paraíba, Brazil
| | - Julys P A Fernandes
- Universidade Federal da Paraíba, Departamento de Química, P.O. Box 5093, Zip Code 58051-970, João Pessoa, Paraíba, Brazil
| | - Josué Carinhanha C Santos
- Universidade Federal de Alagoas, Instituto de Química e Biotecnologia, Campus A.C. Simões, Tabuleiro dos Martins, Zip Code 57072-900, Maceió, Alagoas, Brazil
| | - Francisco Antônio S Cunha
- Universidade Federal de Alagoas, Instituto de Química e Biotecnologia, Campus A.C. Simões, Tabuleiro dos Martins, Zip Code 57072-900, Maceió, Alagoas, Brazil
| | - Mario Cesar Ugulino Araujo
- Universidade Federal da Paraíba, Departamento de Química, P.O. Box 5093, Zip Code 58051-970, João Pessoa, Paraíba, Brazil.
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Singh S, Coulomb B, Boudenne JL, Bonne D, Dumur F, Simon B, Robert-Peillard F. Sub-ppb mercury detection in real environmental samples with an improved rhodamine-based detection system. Talanta 2020; 224:121909. [PMID: 33379113 DOI: 10.1016/j.talanta.2020.121909] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 11/13/2020] [Accepted: 11/17/2020] [Indexed: 01/06/2023]
Abstract
A new procedure is described for the determination of Hg2+ ions in water samples. A Rhodamine based fluorescent sensor was synthesized and the experimental conditions were specifically optimized for application to environmental samples, which requires low detection limits and high selectivity in competitive experiments with realistic concentrations of other metal ions. Incorporation of a Rhodamine-6G fluorophore to a previously described sensor and optimization of the buffer system (detection with acetic acid at pH 5.25) enabled significant enhancement of the sensitivity (detection limit = 0.27 μg L-1) and selectivity. The optimized procedure using high-throughput microplates has been applied to tap and river waters with good results.
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Affiliation(s)
- Sukhdev Singh
- Aix Marseille Université, CNRS, Centrale Marseille, ISm2, Marseille, France
| | | | | | - Damien Bonne
- Aix Marseille Université, CNRS, Centrale Marseille, ISm2, Marseille, France
| | - Frédéric Dumur
- Aix Marseille Univ, CNRS, ICR, UMR 7273, F-13397, Marseille, France
| | - Bertrand Simon
- Institut D'Optique & CNRS, Laboratoire Photonique Numérique et Nanoscience, UMR 5298, Talence, France
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de la Calle I, Páez-Cabaleiro J, Lavilla I, Bendicho C. One-pot synthesis of a magnetic nanocomposite based on ultrasound-assisted co-precipitation for enrichment of Hg(II) prior to detection by a direct mercury analyzer. Talanta 2019; 199:449-456. [DOI: 10.1016/j.talanta.2019.02.085] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 02/20/2019] [Accepted: 02/26/2019] [Indexed: 02/07/2023]
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Macroemulsion-based dispersive magnetic solid phase extraction for preconcentration and determination of copper(II) in gasoline. Mikrochim Acta 2018; 185:99. [DOI: 10.1007/s00604-017-2634-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Accepted: 12/22/2017] [Indexed: 10/18/2022]
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Farajzadeh MA, Yadeghari A, Khoshmaram L. Magnetic solid phase extraction using Fe3O4@SiO2@C8 nanoparticles performed in a narrow-bore tube followed by dispersive liquid–liquid microextraction for extraction and preconcentration of nine pesticides. NEW J CHEM 2018. [DOI: 10.1039/c8nj00501j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
In the present work, a new magnetic solid phase extraction method performed in a narrow-bore tube using synthesized Fe3O4@SiO2@C8 magnetic nanoparticles has been developed.
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Affiliation(s)
- Mir Ali Farajzadeh
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Tabriz
- Tabriz
- Iran
| | - Adeleh Yadeghari
- Department of Analytical Chemistry
- Faculty of Chemistry
- University of Tabriz
- Tabriz
- Iran
| | - Leila Khoshmaram
- Department of Chemistry
- Faculty of Science
- Azarbaijan Shahid Madani University
- Tabriz
- Iran
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Mao J, Cheng J, Wang X, Wang S, Cheng N, Wang J. A rhodamine-based fluorescent probe for Cu(II) determination in aqueous solution. LUMINESCENCE 2014; 30:221-7. [PMID: 25045042 DOI: 10.1002/bio.2717] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Revised: 04/10/2014] [Accepted: 05/08/2014] [Indexed: 11/07/2022]
Abstract
An 'off-on' rhodamine-based fluorescence probe for the selective detection of Cu(II) has been designed, exploiting the guest-induced structure transform mechanism. This system shows a sharp Cu(II)-selective fluorescence enhancement response in an aqueous system under physiological pH, and possesses high selectivity against a background of environmentally and biologically relevant metal ions. Under optimum conditions, the fluorescence intensity enhancement of this system is linearly proportional to the Cu(II) concentration from 50 nM to 6.0 μM with a detection limit of 29 nM.
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Affiliation(s)
- Jie Mao
- Department of Chemistry, Anhui Science and Technology University, Bengbu, Anhui, 233100, People's Republic of China
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