VILLAR NAVARRO , Mercedes

El objetivo principal de esta investigación es la determinación de la cantidad de hidroximetilfurfural (HMF) en diferentes mieles comerciales mediante el método espectrofotométrico para verificar si pueden ser comercializadas. Además las mieles serán analizadas con el objetivo de determinar la concentración de hidroximetilfurfural después de...

El agua es probablemente el recurso natural mas importante del mundo, ya que como expresa la Carta Europea del Agua1, sin agua no hay vida, es un tesoro indispensable para toda la actividad humana, no es un bien inagotable. El agua tiene un papel vital en el desarrollo de las comunidades ya que es indispensable que su abastecimiento sea seguro...

El objetivo principal de esta investigación es la determinación de la cantidad de ácido acético en diferentes vinagres comerciales mediante una valoración ácido-base para determinar el grado de acidez de los mismos, relacionarlos con las diferentes denominaciones de origen y los distintos tipos de envejecimiento. Así mismo se comprobará que...

In the present work, a chemometric-assisted spectrofluorimetric method has been developed for the simultaneous determination of natural fluorescent pesticides, carbaryl, carbendazim, and thiabendazole, in orange and banana. Only a simple extraction with methanol was required as sample pretreatment. Emission-excitation fluorescence matrices were...

Hollow fiber liquid phase micro-extraction (LPME) of linear alkylbenzene sulfonates (LAS) from aqueous samples was studied. Ion pair extraction of C10, C11, C12 and C13 homologues was facilitated with trihexylamine as ion-pairing agent, using di-n-hexylether as solvent for the supported liquid membrane (SLM). Effects of extraction time,...

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...