Miguel Ángel Aguirre Pastor

• PhD
• University of Alicante

In this work, the surface nature‐dependent behaviors of magnetic deep eutectic solvents (MDESs) and magnetic low‐transition‐temperature non‐volatile mixtures (MLTTMs) are reported for the first time. It has been observed that the surface of the material where the MDES or the MLTTM is placed could considerably affect the dispersion and the magnetic...

Analytical Nebulizers: Fundamentals and Applications presents the fundamentals of analytical nebulizers, including types, aerosol generation, characterization, and design information of various classes of nebulizers such as nanonebulizers, multinebulizers, electrosprays, and ultrasonic nebulizers. The continuous development of new analytical techni...

A simple, sensitive and matrix-effect free analytical method for simultaneous determination of Cd, Hg and Pb in drug samples (i.e., commercial dosage tablets) by inductively coupled plasma optical emission spectrometry (ICP OES) has been developed. According to the United States Pharmacopeia (USP) Chapter 232, those metals are considered elemental...

In this work a green and fast sample preparation method based on reversed-phase dispersive liquid-liquid microextraction (RP-DLLME) was developed for the separation and preconcentration of several elements (i.e., Ag, As,...

A new concept of nebulizer (i.e., multinebulizer) has been employed for trace elements (e.g., Cd, Cu, Hg, Ni, Pb, and Zn) determination in marine biota sample (e.g., fish sample). To this end, an analytical methodology based on the combination of a multinebulizer with isotope dilution (ID) calibration strategy and inductively coupled plasma mass sp...

In this study, a sensitive and matrix-effect free analytical method for Cd determination in engine oils and fuel samples by dispersive liquid-liquid microextraction with electrothermal atomic absorption spectrometry has been successfully developed. The extractant solvent used for the microextraction procedure was a magnetic ionic liquid (MIL) (i.e....

A new, inexpensive and easy to use 3D printable device was developed for nephelometric and fluorimetric determination. Its applicability was tested for the quantification of quinine in tonic drinks and sulfate in natural water with good analytical accuracy. In this way, sulfate determination was carried out by nephelometry using a red LED, while qu...

Activate capture and digital counting (AC + DC) is a rapid, 2-step, and ultrasensitive assay for protein quantification from a single droplet through the nanoparticle-photonic crystal coupling embedded in a self-powered microfluidic cartridge.

We demonstrate a rapid, 2-step, and ultrasensitive assay approach for quantification of target protein molecules from a single droplet test sample. The assay is comprised of antibody-conjugated gold nanoparticles (AuNPs) that are “activated” when they are mixed with the test sample and bind their targets. The resulting liquid is passed through a mi...

A new multinebulizer has been employed for wear metal (e.g., Cd, Cr, Cu, Fe, Mn, Ni, Pb) determination in used lubricating oils. To this end, a multinebulizer-based analytical methodology has been proposed by on-line standard dilution analysis (on-line SDA) before inductively coupled plasma optical emission spectrometry (ICP OES) detection (multine...

A rapid and portable analytical methodology has been developed for ibuprofen (IBU) quantification in commercial dosage tablets using a spectrometric smartphone-based system. The analytical methodology employs point-of-use approaches both for sample preparation and detection, demonstrating its potential utility for portable quality control of pharma...

This review focuses on the combination of elemental detection techniques with liquid-phase microextraction (LPME), namely, single drop microextraction, hollow fiber based liquid-phase microextraction, dispersive liquid-liquid microextraction, and related techniques. General features of different microextraction procedures, historical overview and a...

A rapid and portable analytical methodology has been developed for ascorbic acid (Vitamin C) quantification from aqueous samples using a spectrometric smartphone-based system for the first time. The method employs point-of-use approaches both for sample preparation and sample measurement, demonstrating the capability for mobile quality control of p...

The interaction between nanoparticles and the electromagnetic fields associated with optical nanostructures enables sensing with single-nanoparticle limits of detection and digital resolution counting of captured nanoparticles through their intrinsic dielectric permittivity, absorption, and scattering. This paper will review the fundamental sensing...

The purpose of this work is to present a simple, fast, cost effective and environmental friendly magnetic dispersive solid-phase microextraction (MDSPME) method, employing a composite based on ZSM-5 zeolite decorated...

This paper presents a graphene oxide-based magnetic nanocomposite as a catalyst for desulfurization and also as a sorbent for removal of the total sulfur in liquid fuel matrices. The magnetic nanocomposite was prepared by decorating graphene oxide nanosheets with magnetite nanoparticles (MGO). For the desulfurization experiments, an oxidation-extra...

In this work, a new and simple analytical methodology based on in-chamber chemical vapor generation has been developed for the spectrochemical analysis of commercial fuel samples. A multiple nebulizer with three nebulization units has been employed for this purpose: One unit was used for sample introduction, while the other two were used for the ne...

A pesar de ser consideradas como técnicas estándar para el análisis elemental, ICP-OES e ICP-MS todavía poseen dos grandes debilidades: baja eficiencia de transporte del aerosol generado por el nebulizador e interferencias provocadas por la matriz de la muestra. En lo referente a la técnica LIBS, su principal potencial radica en las posibilidades q...

A new procedure for determining trace concentrations of Mo in plants combining dispersive liquid–liquid microextraction and inductively coupled plasma optical emission spectrometry is proposed here. An automated discrete sample introduction system using a Flow Blurring® multiple nebulizer (FBMN) and a solenoid valve were used to insert an organic r...

In this study, an analytical methodology based on a combination of dispersive liquid-liquid microextraction with laser-induced breakdown spectrometry was evaluated for simultaneous pre-concentration, speciation and detection of Cr. The microextraction procedure was based on the injection of appropriated quantities of 1-undecanol and ethanol into a...

Nebulizers offer a wide range of applications in the field of analytical chemistry. This article is a general and comprehensive overview that addresses the most common principles of nebulization and their main and most recent applications in chemical analysis.

In this work, an analytical methodology based on Single Drop Microextraction (SDME) followed by Laser-Induced Breakdown Spectrometry (LIBS) has been tested for trace metals determination in liquid samples. By this method, analytes in the samples were extracted into a small volume of toluene as ammonium pyrroldinedithiocarbamate (APDC) chelates. Aft...

Laser-induced breakdown spectroscopy (LIBS) is a promising analytical technique with well-known advantages and limitations. However, despite its growing popularity, this technique has been applied mainly to solid samples and there have been a smaller number of studies devoted to liquid samples. This lack of studies is mainly due to experimental dif...

A new and easy method has been proposed for the compensation of inorganic acid matrix effects in ICP-OES and ICP-MS. The method consists of an on-line standard addition calibration using a Flow Blurring® multinebulizer (FBMN-based system). Experimental conditions of the FBMN-based system are optimized for both ICP-OES and ICP-MS. Under optimized co...

A simple and fast method for determining the content of Na, K, Ca, Mg, P, and 20 heavy metals in biodiesel samples with inductively coupled plasma optical emission spectrometry (ICP OES) using a two-nozzle Flow Blurring(®) multinebulizer prototype and on-line internal standard calibration, are proposed. The biodiesel samples were produced from diff...

A new Flow Blurring® multiple nebulizer (FBMN) has been used for the efficient generation of As and Se hydrides directly into the aerosol formed inside the spray chamber before detection by inductively coupled plasma optical emission spectrometry (ICP OES). The FBMN allowed the hydride generation directly into the spray chamber without using any ad...

This study shows the application of laser induced breakdown spectroscopy (LIBS) for waste electrical and electronic equipment (WEEE) investigation. Several emission spectra were obtained for 7 different mobiles from 4 different manufacturers. Using the emission spectra of the black components it was possible to see some differences among the manufa...

In this work, the possibility of using Laser-Induced Breakdown Spectrometry (LIBS) combined with liquid–liquid microextraction techniques is evaluated as a simple and fast method for trace elemental analysis. Two different strategies for LIBS analysis of manganese contained in microdroplets of extraction solvent (Triton X-114) are studied: (i) anal...

A new multinebulizer, based on Flow Blurring® technology (FBMN), is evaluated for a simple, fast and direct analysis of organic samples in Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES). Organic samples are analyzed by on-line standard addition calibration using aqueous calibration standards. A Standard Sample Introduction (SSI)...

A new and efficient multiple nebulizer based on Flow Blurring® hydrodynamics (FBMN) has been employed for elemental analysis. The aerosol generated by the FBMN has been characterized and compared with a conventional pneumatic nebulizer (MicroMist®, MM). Both nebulizers have been operated with the same cyclonic spray chamber for comparison. At a sol...

In this work, on-line calibration methods were applied for compensation for matrix effects in Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) using three novel multiple sample introduction systems based on Flow Blurring® technology. The methods were compared with conventional calibration methods, using a Conikal nebulizer and a c...

In this work, a new multiple nebulizer for liquid sample introduction in ICP-based spectrometers was developed and characterized on ICP-AES. The association of the Flow Focusing multiple nebulizer (FFMN) and a dedicated spray chamber was called Flow Focusing multi nebulization system (FFMNS). The nebulizer incorporates four nebulization nozzles wit...