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Last name: LÓPEZ PÉREZ
First name: Germán
Como punto de partida para la realización del trabajo experimental, se ha rediseñado y actualizado un sistema automatizado para la medida de impedancias en celdas galvánicas, potenciando sus características iniciales. También se han desarrollado dos aplic
En esta experiencia se ha diseñado y aplicado un modelo docente basado en metodologías activas de enseñanza aplicado a la Química, concretamente el aprendizaje basado en problemas, con el objetivo final de promover, adquirir y/o consolidar competencias transversales necesarias para la formación integral de los estudiantes. La idea fundamental...
A methodology based on noise injection for generation of randomized tabulated data is presented. The strategy can be used both in online teaching and for specific numerical/graphical exercises, when individualized data sets are required simultaneously for the students. Restrictions imposed on teaching methods during to the SARS-Covid-19...
A chitosan membrane composed by 60% (w/w) chitosan and 40% (w/w) Aliquat®336 has been proposed as a new biopolymeric support for electromembrane extraction. The new support has been characterized by Scanning Electron Microscopy, resulting a 30–35 µm thickness. Amoxicillin, nicotinic acid, hippuric acid, salicylic acid, anthranilic acid,...
In this work, a coulometer was developed from a digitally controlled galvanostat. A simple colorimeter based on a RGB LED was used as a light emitter coupled to light detectors, while light dependent resistance (LDR) and photodiodes have been developed as endpoint detectors. Both hardware and software have been adapted from the original...
A chitosan biopolymeric membrane was successfully used as a support in a green elec- tromembrane extraction procedure for the simultaneous and selective extraction of seven parabens and three fluoroquinolones in the presence of three non-steroidal anti-inflammatory drugs. The optimal experimental conditions (10 mL donor phase and 50 μL acceptor...
A simple, rapid and environmentally friendly method for the electromembrane extraction of polyphenolic compounds has been developed using chitosan films (60% (w/w) chitosan, 40% (w/w)-Aliquat®336, 10–11 μm thickness) as biopolymeric membrane. In this work for the first time with this type of chitosan-based support, the use of organic solvents...
Background: In recent decades, green chemistry has been focusing on the adaptation of different chemical methods towards environmental friendliness. Sample preparation procedures, which constitute a fundamental step in analytical methodology, have also been modified and implemented in this direction. In particular, electromembrane extraction...
The development of a new method for covalent immobilization of biomolecules on the surface of bare gold nanoparticles (AuNPs) by using crosslinking agents in one step is presented. A very compatible biopolymer such as chitosan has been used as a target molecule to probe the viability of the proposed methodology. Click chemistry, based on...
Green and environmentally friendly approaches are increasingly necessary when developing new analytical methodologies. Electromembrane extraction (EME) has contributed to this by offering new alternatives to the traditional and widely used plastic materials. Specially, those derived from bio- polymers (such as agarose or chitosan) have recently...
The use of silver nanoparticles stabilized with citrate and polyvinylpyrrolidone as a sensor for aluminum ions determination is proposed in this paper. These non-functionalized and specific nanoparticles provide a highly selective and sensitive detection system for aluminum in acidic solutions. The synthesized nanoparticles were characterized...
A selective electromembrane extraction procedure for the extraction of Enrofloxacin, Marbofloxacin and Flumequine, usually employed as antibiotic in veterinarian use, is proposed by using a chitosan biofilm, composed by 60% (w/w) chitosan and 40% (w/w) Aliquat®336, as active biopolymeric support. The interaction mechanism occurring between the...