Francisco Antonio Casado-Carmona

University of the Balearic Islands | UIB · Department of Analytical Chemistry

This article describes the synthesis of mixed-mode cationic exchange (MCX) tapes as sorptive phases in bioanalysis, and it faces the determination of methadone and tramadol in saliva as the model analytical problem. The tapes are synthesized using aluminum foil as substrate, which is subsequently covered with double-sided adhesive tape where the MC...

Access to clean water, a Sustainable Development Goal, can only be accomplished worldwide using affordable technologies. In the analytical chemistry realm, developing cheap devices capable of on-site extraction results in a helpful tool. This article presents a new device based on open-source technologies for the on-site extraction of isoflavones f...

The need for the analysis of environmental samples: air, water, and soils arose from the crucial importance that these compartments have for the development of living beings. The presence of contaminants will jeopardize the normal growth of plants, animals, and humans. On most occasions, the human activity is responsible for the contaminants that f...

Polymeric nanocomposites have been extensively used as sorbents to extract pollutants from environmental waters before their final instrumental analysis. These materials are highly versatile and can be adapted to a given analytical problem by selecting the polymer/nanomaterial combination adequately. The adaptability of the materials is strengthene...

The spatial heterogeneity of environmental systems makes sampling at multiple locations crucial to provide complete and representative information. The on-site application of an extraction technique simplifies the sampling logistics, increasing sample integrity during transportation and storage. This article presents a portable, simple, and low-cos...

In this article, a new air sampler based on a conventional computer fan is presented and evaluated. The fan has a double role as it acts as the air pumping system and supports the sorptive phases, which are located on its blades. The compact design and the reduced energy consumption (it can operate with a standard cell phone charger) confers high p...

In this article, a magnetic paper-based sorptive phase is synthesized, which synergically combines the sorption capacity of a polyamide with the magnetic behavior of silica shielded Fe3O4 nanoparticles. The resulting material can be easily integrated into a drill-based environmental sampler, minimizing the diffusion boundary layer for enhanced mass...

Magnetite nanoparticles (Fe3O4) functionalized with graphene oxide (GO) have been synthesized through a silanization process of the magnetic nanoparticles with tetraethyl orthosilicate and (3-aminopropyl)triethoxysilane and further coupling of GO. The synthesized nanomaterials have been characterized by several techniques, such as transmission elec...

A highly efficient magnetic dispersive micro-solid phase extraction (M-D-μSPE) method was developed for Te preconcentration and speciation analysis in different environmental samples. A novel magnetic polymeric ionic liquid nanocomposite synthesized based on the Radziszewski reaction was applied for the selective retention of Te(IV) species, follow...

The functionalization of silica-coated, magnetic Fe3O4 nanoparticles, with an iron-containing ionic liquid, allows for the synthesis of a Fe3O4@SiO2@(mim)[FeCl4] system that can be employed as a magnetically recoverable nanocatalyst. Herein, we present the use of Fe3O4@SiO2@(mim)[FeCl4] for the glycolysis of PET into BHET under conventional heating...

A portable device that integrates sampling and extraction is proposed in this work. The unit is fabricated using commercial and standardized elements which guarantees the construction reproducibility. Also, it is simple to be mounted and on-site deployed making possible the multi-site sampling. The device uses a commercial nylon membrane as extract...

A hybrid nanomaterial was synthesized to be used in dispersive solid phase microextraction. It consist of a magnetic core (Fe3O4), obtained by coprecipitation covered by a silica (SiO2) layer were the ionic liquid methylimidazolium hexafluorophosphate (MIM-PF6) was attached. The Fe3O4@SiO2@MIM-PF6 nanoparticles have been characterized by microscopy...