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Magnetic Nylon 6 Nanocomposites for the Microextraction of Nucleic Acids from Biological Samples. MAGNETOCHEMISTRY 2022. [DOI: 10.3390/magnetochemistry8080085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Magnetic Fe3O4 nanoparticles (MNPs) have great potential for nucleic acid separation, detection, and delivery. MNPs are considered a valuable tool in biomedicine due to their cost-effectiveness, stability, easy surface functionalization, and the possibility of the manipulations under a magnetic field. Herein, the synthesis of magnetic nylon 6 nanocomposites (MNPs@Ny6) was investigated. Transmission electron microscopy (TEM) was used for morphology and size analysis. A new method of UV-induced immobilization of oligonucleotides on MNPs@Ny6 for nucleic acid magnetic separation was proposed. MNPs@Ny6 shows a high oligonucleotide binding capacity of 2.2 nmol/mg with 73.3% loading efficiency. The proposed system has been applied to analyze model mixtures of target RNA on the total yeast RNA background. The RNA target isolation efficiency was 60% with high specificity. The bind RNA release was 88.8% in a quantity of 0.16 nmol/mg. The total RNA capture efficiency was 53%. Considering this, the MNPs@Ny6 is an attractive candidate for nucleic acids-specific magnetic isolation.
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2
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Ortega-Zamora C, González-Sálamo J, Perretti MD, Santana D, Carrillo R, Hernández-Borges J. Chain-Shattering Polymers as Degradable Microdispersive Solid-Phase Extraction Sorbents. Anal Chem 2022; 94:9065-9073. [PMID: 35695755 PMCID: PMC9244869 DOI: 10.1021/acs.analchem.2c01301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
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A chain-shattering
polymer (CSP) has been proposed as a microdispersive
solid-phase extraction (μdSPE) sorbent in a proof-of-concept
study of degradable materials for analytical purposes. The responsive
CSP was synthesized from 1,3,5-tris(bromomethyl)-2-nitrobenzene acting
as the self-immolative trigger responsive unit and 2,6-naphthalenedicarboxylic
acid as aromatic linker to enhance noncovalent aromatic interactions
with the analytes. The CSP was characterized and applied as a μdSPE
sorbent of a group of plasticizers, which were selected as model analytes,
from different types of environmental water samples (tap, waste, and
spring waters). Gas chromatography coupled to mass spectrometry detection
was used for analyte determination. Mean recovery values were in the
range of 80%–118% with RSD values below 22%. After the extraction,
the polymer could be efficiently degraded by UV irradiation or by
chemical reduction, recovering the aromatic linker. This work has
proved the potential of CSPs as recyclable sorbents, paving the way
to more environmentally benign analytical procedures.
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Affiliation(s)
- Cecilia Ortega-Zamora
- Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n, 38206 San Cristóbal de La Laguna, Spain.,Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n, 38206 San Cristóbal de La Laguna, Spain
| | - Javier González-Sálamo
- Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n, 38206 San Cristóbal de La Laguna, Spain.,Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n, 38206 San Cristóbal de La Laguna, Spain.,Department of Chemistry, Sapienza University, P.le Aldo Moro, 5, 00185 Rome, Italy
| | - Marcelle D Perretti
- Instituto de Productos Naturales y Agrobiología, CSIC, Avda. Astrofísico Fco. Sánchez, s/n, 38206 La Laguna, Spain
| | - David Santana
- Instituto de Productos Naturales y Agrobiología, CSIC, Avda. Astrofísico Fco. Sánchez, s/n, 38206 La Laguna, Spain
| | - Romen Carrillo
- Instituto de Productos Naturales y Agrobiología, CSIC, Avda. Astrofísico Fco. Sánchez, s/n, 38206 La Laguna, Spain
| | - Javier Hernández-Borges
- Departamento de Química, Unidad Departamental de Química Analítica, Facultad de Ciencias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n, 38206 San Cristóbal de La Laguna, Spain.,Instituto Universitario de Enfermedades Tropicales y Salud Pública de Canarias, Universidad de La Laguna (ULL), Avda. Astrofísico Fco. Sánchez, s/n, 38206 San Cristóbal de La Laguna, Spain
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Bustamante-Torres M, Romero-Fierro D, Arcentales-Vera B, Pardo S, Bucio E. Interaction between Filler and Polymeric Matrix in Nanocomposites: Magnetic Approach and Applications. Polymers (Basel) 2021; 13:2998. [PMID: 34503038 PMCID: PMC8434030 DOI: 10.3390/polym13172998] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/30/2021] [Accepted: 09/03/2021] [Indexed: 01/09/2023] Open
Abstract
In recent years, polymer nanocomposites produced by combining nanofillers and a polymeric matrix are emerging as interesting materials. Polymeric composites have a wide range of applications due to the outstanding and enhanced properties that are obtained thanks to the introduction of nanoparticles. Therefore, understanding the filler-matrix relationship is an important factor in the continued growth of this scientific area and the development of new materials with desired properties and specific applications. Due to their performance in response to a magnetic field magnetic nanocomposites represent an important class of functional nanocomposites. Due to their properties, magnetic nanocomposites have found numerous applications in biomedical applications such as drug delivery, theranostics, etc. This article aims to provide an overview of the filler-polymeric matrix relationship, with a special focus on magnetic nanocomposites and their potential applications in the biomedical field.
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Affiliation(s)
- Moises Bustamante-Torres
- Departamento de Biología, Escuela de Ciencias Biológicas e Ingeniería, Universidad de Investigación de Tecnología Experimental Yachay, Urcuquí 100650, Ecuador
- Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Ciudad de Mexico 04510, Mexico;
| | - David Romero-Fierro
- Departamento de Química de Radiaciones y Radioquímica, Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Ciudad de Mexico 04510, Mexico;
- Departamento de Química, Escuela de Ciencias Química e Ingeniería, Universidad de Investigación de Tecnología Experimental Yachay, Urcuquí 100650, Ecuador;
| | - Belén Arcentales-Vera
- Departamento de Química, Escuela de Ciencias Química e Ingeniería, Universidad de Investigación de Tecnología Experimental Yachay, Urcuquí 100650, Ecuador;
| | - Samantha Pardo
- Facultad de Ciencias de la Vida, Universidad Politécnica Salesiana, Quito 170702, Ecuador;
| | - Emilio Bucio
- Facultad de Ciencias de la Vida, Universidad Politécnica Salesiana, Quito 170702, Ecuador;
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Fresco-Cala B, Gálvez-Vergara A, Cárdenas S. Preparation, characterization and evaluation of hydrophilic polymers containing magnetic nanoparticles and amine-modified carbon nanotubes for the determination of anti-inflammatory drugs in urine samples. Talanta 2020; 218:121124. [DOI: 10.1016/j.talanta.2020.121124] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Revised: 04/29/2020] [Accepted: 05/04/2020] [Indexed: 10/24/2022]
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Díaz-Liñán MC, García-Valverde MT, Lucena R, Cárdenas S, López-Lorente AI. Paper-based sorptive phases for microextraction and sensing. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2020; 12:3074-3091. [PMID: 32930167 DOI: 10.1039/d0ay00702a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The simplification of the analytical procedures, including cost-effective materials and detectors, is a current research trend. In this context, paper has been identified as a useful material thanks to its low price and high availability in different compositions (office, filter, chromatographic). Its porosity, flexibility, and planar geometry permit the design of flow-through devices compatible with most instrumental techniques. This article provides a general overview of the potential of paper, as substrate, on the simplification of analytical chemistry methodologies. The design of paper-based sorptive phases is considered in-depth, and the different functionalization strategies are described. Considering our experience in sample preparation, special attention has been paid to the use of these phases under the classical microextraction-analysis workflow, which usually includes a chromatographic separation of the analytes before their determination. However, the interest of these materials extends beyond this field as they can be easily implemented into spectroscopic and electrochemical sensors. Finally, the direct analysis of paper substrates in mass spectrometry, in the so-called paper-spray technique is also discussed. This review is more focused on presenting ideas rather than the description of specific applications to draw a general picture of the potential of these materials.
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Affiliation(s)
- M C Díaz-Liñán
- Departamento de Química Analítica, Instituto, Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain.
| | - M T García-Valverde
- Departamento de Química Analítica, Instituto, Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain.
| | - R Lucena
- Departamento de Química Analítica, Instituto, Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain.
| | - S Cárdenas
- Departamento de Química Analítica, Instituto, Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain.
| | - A I López-Lorente
- Departamento de Química Analítica, Instituto, Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain.
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6
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Microextraction approaches for bioanalytical applications: An overview. J Chromatogr A 2019; 1616:460790. [PMID: 31892411 DOI: 10.1016/j.chroma.2019.460790] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2019] [Revised: 12/12/2019] [Accepted: 12/13/2019] [Indexed: 12/18/2022]
Abstract
Biological samples are usually complex matrices due to the presence of proteins, salts and a variety of organic compounds with chemical properties similar to those of the target analytes. Therefore, sample preparation is often mandatory in order to isolate the analytes from troublesome matrices before instrumental analysis. Because the number of samples in drug development, doping analysis, forensic science, toxicological analysis, and preclinical and clinical assays is steadily increasing, novel high throughput sample preparation approaches are calling for. The key factors in this development are the miniaturization and the automation of the sample preparation approaches so as to cope with most of the twelve principles of green chemistry. In this review, recent trends in sample preparation and novel strategies will be discussed in detail with particular focus on sorptive and liquid-phase microextraction in bioanalysis. The actual applicability of selective sorbents is also considered. Additionally, the role of 3D printing in microextraction for bioanalytical methods will be pinpointed.
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Magnetic Polyamide Nanocomposites for the Microextraction of Benzophenones from Water Samples. MOLECULES (BASEL, SWITZERLAND) 2019; 24:molecules24050953. [PMID: 30857139 PMCID: PMC6429122 DOI: 10.3390/molecules24050953] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/18/2019] [Accepted: 03/01/2019] [Indexed: 11/30/2022]
Abstract
In this article, the influence of the monomers on the extraction efficiency and the effect of the addition of surfactants during the synthesis have also been considered. The sorption capacity of the resulting nanocomposites has been evaluated, in the dispersive micro-solid phase extraction format, by determining that of six benzophenones in water using ultra performance liquid chromatography (UPLC) combined with photodiode array detection. Under the optimum conditions, the limits of detection were in the range of 0.5–4.3 ng/mL and the repeatability, expressed as the relative standard deviation (RSD), varied between 1.5% and 5.6%. The proposed method has been applied for the analysis of real water samples, providing relative recoveries in the interval of 84–105%
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Fresco-Cala B, Cárdenas S. Preparation of macroscopic carbon nanohorn-based monoliths in polypropylene tips by medium internal phase emulsion for the determination of parabens in urine samples. Talanta 2019; 198:295-301. [PMID: 30876563 DOI: 10.1016/j.talanta.2019.02.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 02/03/2019] [Accepted: 02/05/2019] [Indexed: 01/21/2023]
Abstract
A porous monolithic solid based on single-walled carbon nanohorns dahlia-like structure, produced from a medium internal phase emulsion (MIPE), was prepared in a polypropylene tip using UV energy. Thus, single-walled carbon nanohorns (SWNHs) were added to the organic phase where they polymerized in the presence of a radical initiator. A cross-linker (ethylene dimethacrylate, EDMA) was also used in order to obtain a more robust structure. On the other hand, aqueous phase was the responsible for generating the pores in the final solid being inside the droplets generated by the surfactant (Pluronic L121) used to stabilize the polymerization emulsion. Variables related to the formation of the monolithic phase including the stability and composition of emulsion mixture, size of pores, solvent flow resistance and robustness, were studied in detail. In addition, the potential of the SWNH-monolith as extractant phase was evaluated using parabens as target analytes. The LODs ranged from 1 to 7 μg L-1, while the linear range was extended up to 5000 μg L-1. The reproducibility of the extraction procedure with different batches of emulsions was acceptable with RSD values < 16% and one prepared SWNH-tip can be used for more than 100 times without apparent extraction losses. The microextraction unit yielded an enrichment factor of 20 for all analytes (extraction efficiency of 100%), with recovery values between 80% and 116% in human urine samples.
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Affiliation(s)
- Beatriz Fresco-Cala
- Departamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain
| | - Soledad Cárdenas
- Departamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain.
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Fresco-Cala B, Cárdenas S. Potential of nanoparticle-based hybrid monoliths as sorbents in microextraction techniques. Anal Chim Acta 2018; 1031:15-27. [DOI: 10.1016/j.aca.2018.05.069] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 05/25/2018] [Accepted: 05/27/2018] [Indexed: 12/29/2022]
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Walper SA, Lasarte Aragonés G, Sapsford KE, Brown CW, Rowland CE, Breger JC, Medintz IL. Detecting Biothreat Agents: From Current Diagnostics to Developing Sensor Technologies. ACS Sens 2018; 3:1894-2024. [PMID: 30080029 DOI: 10.1021/acssensors.8b00420] [Citation(s) in RCA: 76] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Although a fundamental understanding of the pathogenicity of most biothreat agents has been elucidated and available treatments have increased substantially over the past decades, they still represent a significant public health threat in this age of (bio)terrorism, indiscriminate warfare, pollution, climate change, unchecked population growth, and globalization. The key step to almost all prevention, protection, prophylaxis, post-exposure treatment, and mitigation of any bioagent is early detection. Here, we review available methods for detecting bioagents including pathogenic bacteria and viruses along with their toxins. An introduction placing this subject in the historical context of previous naturally occurring outbreaks and efforts to weaponize selected agents is first provided along with definitions and relevant considerations. An overview of the detection technologies that find use in this endeavor along with how they provide data or transduce signal within a sensing configuration follows. Current "gold" standards for biothreat detection/diagnostics along with a listing of relevant FDA approved in vitro diagnostic devices is then discussed to provide an overview of the current state of the art. Given the 2014 outbreak of Ebola virus in Western Africa and the recent 2016 spread of Zika virus in the Americas, discussion of what constitutes a public health emergency and how new in vitro diagnostic devices are authorized for emergency use in the U.S. are also included. The majority of the Review is then subdivided around the sensing of bacterial, viral, and toxin biothreats with each including an overview of the major agents in that class, a detailed cross-section of different sensing methods in development based on assay format or analytical technique, and some discussion of related microfluidic lab-on-a-chip/point-of-care devices. Finally, an outlook is given on how this field will develop from the perspective of the biosensing technology itself and the new emerging threats they may face.
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Affiliation(s)
- Scott A. Walper
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Guillermo Lasarte Aragonés
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- College of Science, George Mason University Fairfax, Virginia 22030, United States
| | - Kim E. Sapsford
- OMPT/CDRH/OIR/DMD Bacterial Respiratory and Medical Countermeasures Branch, U.S. Food and Drug Administration, Silver Spring, Maryland 20993, United States
| | - Carl W. Brown
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- College of Science, George Mason University Fairfax, Virginia 22030, United States
| | - Clare E. Rowland
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
- National Research Council, Washington, D.C. 20036, United States
| | - Joyce C. Breger
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
| | - Igor L. Medintz
- Center for Bio/Molecular Science and Engineering, Code 6900, U.S. Naval Research Laboratory, Washington, D.C. 20375, United States
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Bitas D, Samanidou V. Molecularly Imprinted Polymers as Extracting Media for the Chromatographic Determination of Antibiotics in Milk. Molecules 2018; 23:E316. [PMID: 29393877 PMCID: PMC6017535 DOI: 10.3390/molecules23020316] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Revised: 01/26/2018] [Accepted: 02/01/2018] [Indexed: 11/16/2022] Open
Abstract
Milk-producing animals are typically kept stationary in overcrowded large-scale farms and in most cases under unsanitary conditions, which promotes the development of infections. In order to maintain sufficient health status among the herd or promote growth and increase production, farmers administer preventative antibiotic doses to the animals through their feed. However, many antibiotics used in cattle farms are intended for the treatment of bacterial infections in humans. This results in the development of antibiotic-resistant bacteria which pose a great risk for public health. Additionally, antibiotic residues are found in milk and dairy products, with potential toxic effects for the consumers. Hence the need of antibiotic residues monitoring in milk arises. Analytical methods were developed for the determination of antibiotics in milk, with key priority given to the analyte extraction and preconcentration step. Extraction can benefit from the production of molecularly imprinted polymers (MIPs) that can be applied as sorbents for the extraction of specific antibiotics. This review focuses on the principals of molecular imprinting technology and synthesis methods of MIPs, as well as the application of MIPs and MIPs composites for the chromatographic determination of various antibiotic categories in milk found in the recent literature.
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Affiliation(s)
- Dimitrios Bitas
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
| | - Victoria Samanidou
- Laboratory of Analytical Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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Recycling polymer residues to synthesize magnetic nanocomposites for dispersive micro-solid phase extraction. Talanta 2017; 170:451-456. [DOI: 10.1016/j.talanta.2017.04.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Revised: 04/03/2017] [Accepted: 04/11/2017] [Indexed: 11/18/2022]
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Ahmadi M, Elmongy H, Madrakian T, Abdel-Rehim M. Nanomaterials as sorbents for sample preparation in bioanalysis: A review. Anal Chim Acta 2017; 958:1-21. [DOI: 10.1016/j.aca.2016.11.062] [Citation(s) in RCA: 177] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 11/24/2016] [Accepted: 11/27/2016] [Indexed: 01/02/2023]
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Reyes-Gallardo EM, Lucena R, Cárdenas S. Silica nanoparticles–nylon 6 composites: synthesis, characterization and potential use as sorbent. RSC Adv 2017. [DOI: 10.1039/c6ra24739c] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Silica nanoparticle–nylon 6 composites are successfully synthesized following a simple and rapid procedure. After their characterization, the composites were evaluated as sorbents under a dispersive solid phase microextraction format.
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Affiliation(s)
- E. M. Reyes-Gallardo
- Department of Analytical Chemistry
- Institute of Fine Chemistry and Nanochemistry
- Marie Curie Building
- University of Córdoba
- 14071 Córdoba
| | - R. Lucena
- Department of Analytical Chemistry
- Institute of Fine Chemistry and Nanochemistry
- Marie Curie Building
- University of Córdoba
- 14071 Córdoba
| | - S. Cárdenas
- Department of Analytical Chemistry
- Institute of Fine Chemistry and Nanochemistry
- Marie Curie Building
- University of Córdoba
- 14071 Córdoba
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15
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Castro-Grijalba A, Reyes-Gallardo EM, Wuilloud RG, Lucena R, Cárdenas S. Synthesis of magnetic polymeric ionic liquid nanocomposites by the Radziszewski reaction. RSC Adv 2017. [DOI: 10.1039/c7ra07947h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The application of the Radziszewski reaction is proposed for the first time for the synthesis of magnetic polymeric ionic liquids. After their characterization, the sorption ability of the nanocomposites towards acidic compounds have been evaluated.
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Affiliation(s)
- Alexander Castro-Grijalba
- Laboratory of Analytical Chemistry for Research and Development (QUIANID)
- Facultad de Ciencias Exactas y Naturales
- Universidad Nacional de Cuyo
- Instituto Interdisciplinario de Ciencias Básicas (ICB), UNCUYO-CONICET
- (5500) Mendoza
| | - Emilia M. Reyes-Gallardo
- Departamento de Química Analítica
- Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN
- Universidad de Córdoba
- E-14071 Córdoba
- Spain
| | - Rodolfo G. Wuilloud
- Laboratory of Analytical Chemistry for Research and Development (QUIANID)
- Facultad de Ciencias Exactas y Naturales
- Universidad Nacional de Cuyo
- Instituto Interdisciplinario de Ciencias Básicas (ICB), UNCUYO-CONICET
- (5500) Mendoza
| | - Rafael Lucena
- Departamento de Química Analítica
- Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN
- Universidad de Córdoba
- E-14071 Córdoba
- Spain
| | - Soledad Cárdenas
- Departamento de Química Analítica
- Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN
- Universidad de Córdoba
- E-14071 Córdoba
- Spain
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Determination of propranolol and carvedilol in urine samples using a magnetic polyamide composite and LC–MS/MS. Bioanalysis 2016; 8:2115-23. [DOI: 10.4155/bio-2016-0015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: β-blockers are compounds that bind with adrenoreceptors hindering their interaction with adrenalin and noradrenalin. They are clinically relevant and they are also used in some sport as doping agents. Results: A new method based on the combination of dispersive micro-solid phase extraction and LC–MS/MS has been developed to determine propranolol and carvedilol in urine samples. For this purpose a magnetic-polyamide composite is synthesized and used as sorbent. Working under the optimum conditions, the method provides limits of detection and quantification in the range of 0.1–0.15 μg/l and 0.3–0.5 μg/l, for carvedilol and propranolol, respectively. The precision, expressed as RSD, was better than 9.6% and the relative recoveries varied between 73.7 and 81.3%. Conclusion: The methodology is appropriate for the determination of β-blockers in urine samples at the low microgram per liter range for therapeutic purposes.
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Bagheri H, Banihashemi S, Jelvani S. A polythiophene–silver nanocomposite for headspace needle trap extraction. J Chromatogr A 2016; 1460:1-8. [DOI: 10.1016/j.chroma.2016.06.078] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Revised: 06/25/2016] [Accepted: 06/27/2016] [Indexed: 12/11/2022]
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