M
María M. Afonso
Researcher at University of La Laguna
Publications - 42
Citations - 679
María M. Afonso is an academic researcher from University of La Laguna. The author has contributed to research in topics: Lewis acids and bases & Diels–Alder reaction. The author has an hindex of 15, co-authored 42 publications receiving 612 citations. Previous affiliations of María M. Afonso include Spanish National Research Council.
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Journal ArticleDOI
Comparison between magnetic and non magnetic multi-walled carbon nanotubes-dispersive solid-phase extraction combined with ultra-high performance liquid chromatography for the determination of sulfonamide antibiotics in water samples
Antonio V. Herrera-Herrera,Javier Hernández-Borges,María M. Afonso,J. Antonio Palenzuela,Miguel Ángel Rodríguez-Delgado +4 more
TL;DR: A new method based on the use of off-line dispersive solid-phase extraction (dSPE) combined with ultra-high performance liquid chromatography with diode-array detection was developed to determine 11 sulfonamide antibiotics in mineral waters with different mineral content.
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Oxidized multi-walled carbon nanotubes for the dispersive solid-phase extraction of quinolone antibiotics from water samples using capillary electrophoresis and large volume sample stacking with polarity switching.
Antonio V. Herrera-Herrera,Lidia M. Ravelo-Pérez,Javier Hernández-Borges,María M. Afonso,J. Antonio Palenzuela,Miguel Ángel Rodríguez-Delgado +5 more
TL;DR: Application of the developed method to the analysis of spiked Milli-Q, mineral, tap, and wastewater samples resulted in good recoveries values, with relative standard deviation values lower than 7.7% in all cases.
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Stereoselective syntheses of erythro- and threo-.beta.-amino alcohol derivatives via hetero-Diels-Alder reactions
M. Mark Midland,María M. Afonso +1 more
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Reduced graphene oxide-coated magnetic-nanoparticles as sorbent for the determination of phthalates in environmental samples by micro-dispersive solid-phase extraction followed by ultra-high-performance liquid chromatography tandem mass spectrometry
Álvaro Santana-Mayor,Bárbara Socas-Rodríguez,María M. Afonso,José Antonio Palenzuela-López,Miguel Ángel Rodríguez-Delgado +4 more
TL;DR: The suitability of Fe3O4 nanoparticles coated with reduced-graphene oxide as sorbent was evaluated for the extraction of a group of fourteen phthalic acid esters from environmental samples finding the presence of DMP, DPP, BBP, DIBP and DBP in some of the analysed matrices.
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Synthesis of octahydroquinolines through the Lewis acid catalyzed reaction of vinyl allenes and imines.
TL;DR: The reaction of vinyl allenes with imines under Lewis acid catalysis has been explored and octahydroquinoline derivatives as single isomers together with a minor compound formed by an ene reaction of the imine with the allene were given.