A. Afonso

发表

A novel preconcentration strategy for extraction methods based on common cationic surfactants: an alternative to classical coacervative extraction.

V. Pino, J. H. Ayala, A. M. Afonso, 2012, Journal of chromatography. A.

Rapid microwave-assisted dansylation of biogenic amines: Analysis by high-performance liquid chromatography

J. H. Ayala, V. G. Díaz, R. M. Linares, 1998 .

SPECTROFLUORIMETRIC DETEMINATION OF CARBARYL AND 1-NAPHTHOL IN MICELLA MEDIA

J. H. Ayala, V. González, A. Afonso, 1991 .

Vacuum-assisted headspace-solid phase microextraction for determining volatile free fatty acids and phenols. Investigations on the effect of pressure on competitive adsorption phenomena in a multicomponent system.

E. Psillakis, V. Pino, Jared L. Anderson, 2017, Analytica chimica acta.

Surface-bonded ionic liquid stationary phases in high-performance liquid chromatography--a review.

V. Pino, A. M. Afonso, A. Afonso, 2012, Analytica chimica acta.

Nonionic surfactant mixtures: a new cloud-point extraction approach for the determination of PAHs in seawater using HPLC with fluorimetric detection

V. Pino, J. H. Ayala, A. M. Afonso, 2004 .

Kinetic spectrofluorimetric determination of silver, based on its catalytic effect on the oxidation of pyrocatechol-1-aldehyde 2-pyridylhydrazone by peroxodisulphate in the presence of 1,10-phenanthroline as activator.

F. G. Montelongo, J. J. Santana, A. Afonso, 1986, Talanta.

Purification and characterization of the glycopeptide II from the hemoglobin of Biomphalaria glabrata

A. M. Afonso, T. Freitas, A. G. Neves, 1985 .

Characterization of the hemoglobin of Biomphalaria glabrata as a glycoprotein.

A. M. Afonso, A. Neves, M. Arrieta, 1976, Biochimica et biophysica acta.

Polymeric ionic liquid coatings versus commercial solid-phase microextraction coatings for the determination of volatile compounds in cheeses.

William T. S. Cole, V. Pino, Jared L. Anderson, 2014, Talanta.

Micellar solid-phase microextraction for determining partition coefficients of substituted polycyclic aromatic hydrocarbons in micellar media: possible prediction of hydrocarbon–micelle behaviour

V. Pino, J. H. Ayala, V. González, 2007, Analytical and bioanalytical chemistry.

Study of the interactions between phenolic compounds and micellar media using micellar solid-phase microextraction/gas chromatography.

V. Pino, J. H. Ayala, V. González, 2005, Journal of chromatography. A.

Micellar microwave-assisted extraction combined with solid-phase microextraction for the determination of polycyclic aromatic hydrocarbons in a certified marine sediment

V. Pino, J. H. Ayala, V. González, 2003 .

Utilization of a benzyl functionalized polymeric ionic liquid for the sensitive determination of polycyclic aromatic hydrocarbons; parabens and alkylphenols in waters using solid-phase microextraction coupled to gas chromatography-flame ionization detection.

V. Pino, Jared L. Anderson, A. M. Afonso, 2010, Journal of chromatography. A.

Ultrasonic micellar extraction of polycyclic aromatic hydrocarbons from marine sediments.

V. Pino, J. H. Ayala, A. M. Afonso, 2001, Talanta.

Glycopeptides from the hemoglobin of Biomphalaria glabrata-partial characterization

M. Santoro, A. M. Afonso, A. G. Neves, 1980 .

Purification and some properties of β-d-glucosidase from the hepatopancreas of Biomphalaria glabrata

A. M. Afonso, S. Figueiredo, Nadiel Massahud, 1988 .

Effects of cetylpyridinium bromide micelles on the spectrofluorimetric characteristics of polycyclic aromatic hydrocarbons.

J. H. Ayala, V. González, A. Afonso, 1997, Talanta: The International Journal of Pure and Applied Analytical Chemistry.

Ionic liquids as desorption solvents and memory effect suppressors in heterocyclic aromatic amines determination by SPME–HPLC fluorescence

J. H. Ayala, A. M. Afonso, V. González, 2009, Analytical and bioanalytical chemistry.

Selective analysis of fluorene by quenched fluorescence in cetylpyridinium bromide micelles

J. H. Ayala, A. M. Afonso, Venerando González-Diaz, 1998 .

Determination of polycyclic aromatic hydrocarbons in seawater by high-performance liquid chromatography with fluorescence detection following micelle-mediated preconcentration.

V. Pino, J. H. Ayala, A. M. Afonso, 2002, Journal of chromatography. A.

Ionic liquid-based miniaturized aqueous biphasic system to develop an environmental-friendly analytical preconcentration method.

Idaira Pacheco-Fernández, V. Pino, J. H. Ayala, 2019, Talanta.

Analytical methods applied to the determination of heterocyclic aromatic amines in foods.

J. H. Ayala, A. M. Afonso, V. González, 2008, Journal of chromatography. B, Analytical technologies in the biomedical and life sciences.

The ionic liquid 1-hexadecyl-3-methylimidazolium bromide as novel extracting system for polycyclic aromatic hydrocarbons contained in sediments using focused microwave-assisted extraction.

V. Pino, Jared L. Anderson, J. H. Ayala, 2008, Journal of chromatography. A.

Emissions of polycyclic aromatic hydrocarbons from combustion of agricultural and sylvicultural debris

J. H. Ayala, A. M. Afonso, V. González, 2005 .

Experimental Design Optimization of Solid‐Phase Microextraction Conditions for the Determination of Heterocyclic Aromatic Amines by High‐Performance Liquid Chromatography

J. H. Ayala, A. M. Afonso, V. González, 2006 .

Factors That Affect the Content of Heterocyclic Aromatic Amines in Foods

A. M. Afonso, M. S. Alaejos, A. Afonso, 2011 .

DETERMINATION OF N-NITROSODIMETHYLAMINE BY HPLC, WITH FLUORESCENCE DETECTION. A SURVEY OF N-NITROSODIMETHYLAMINE IN COMMERCIAL BEERS

J. H. Ayala, A. M. Afonso, V. González, 2002 .

Fast microwave-assisted dansylation of N-nitrosamines. Analysis by high-performance liquid chromatography with fluorescence detection.

V. González, L. Cárdenes, A. Afonso, 2002, Journal of chromatography. A.

Determination of the alkyl- and methoxy-phenolic content in wood extractives by micellar solid-phase microextraction and gas chromatography-mass spectrometry.

V. Pino, J. H. Ayala, A. M. Afonso, 2007, Talanta.

Multiple headspace solid-phase microextraction for quantifying volatile free fatty acids in cheeses.

V. Pino, J. H. Ayala, A. M. Afonso, 2014, Talanta.

Dispersive liquid-liquid microextraction versus single-drop microextraction for the determination of several endocrine-disrupting phenols from seawaters.

V. Pino, A. M. Afonso, Jessica López-Darias, 2010, Talanta.

Monitoring trihalomethanes in chlorinated waters using a dispersive liquid–liquid microextraction method with a non-chlorinated organic solvent and gas chromatography–mass spectrometry

Idaira Pacheco-Fernández, V. Pino, Bárbara Delgado, 2017, Environmental technology.

Ionic liquids in dispersive liquid-liquid microextraction

V. Pino, A. M. Afonso, M. J. Trujillo-Rodríguez, 2013 .

A novel in situ preconcentration method with ionic liquid-based surfactants resulting in enhanced sensitivity for the extraction of polycyclic aromatic hydrocarbons from toasted cereals.

V. Pino, Jared L. Anderson, A. M. Afonso, 2012, Journal of chromatography. A.

Use of ionic liquid aggregates of 1-hexadecyl-3-butyl imidazolium bromide in a focused-microwave assisted extraction method followed by high-performance liquid chromatography with ultraviolet and fluorescence detection to determine the 15+1 EU priority PAHs in toasted cereals ("gofios").

V. Pino, Jared L. Anderson, Mónica Germán-Hernández, 2011, Talanta.

Use of a pH-sensitive polymer in a microextraction and preconcentration method directly combined with high-performance liquid chromatography.

D. Díaz, Idaira Pacheco-Fernández, V. Pino, 2020, Journal of chromatography. A.

Utilization of an ionic liquid in situ preconcentration method for the determination of the 15 + 1 European Union polycyclic aromatic hydrocarbons in drinking water and fruit-tea infusions.

V. Pino, Mónica Germán-Hernández, A. Afonso, 2013, Journal of separation science.

Salt-induced ionic liquid-based microextraction using a low cytotoxic guanidinium ionic liquid and liquid chromatography with fluorescence detection to determine monohydroxylated polycyclic aromatic hydrocarbons in urine

J. Lorenzo-Morales, Idaira Pacheco-Fernández, V. Pino, 2018, Analytical and Bioanalytical Chemistry.

Utilization of highly robust and selective crosslinked polymeric ionic liquid-based sorbent coatings in direct-immersion solid-phase microextraction and high-performance liquid chromatography for determining polar organic pollutants in waters.

Idaira Pacheco-Fernández, Alireza Najafi, V. Pino, 2016, Talanta.

Determination of N-nitrosamines by HPTLC with Fluorescence Detection — Use of Non-Ionic Surfactants as Enhancing Agents

V. González, L. Cárdenes, A. Afonso, 2002, Jpc-journal of Planar Chromatography-modern Tlc.

Metabolism and toxicology of heterocyclic aromatic amines when consumed in diet: Influence of the genetic susceptibility to develop human cancer. A review

V. Pino, Verónica Pino, Ana M. Afonso, 2008 .

A green metal–organic framework to monitor water contaminants

J. Pasán, C. Ruiz-Pérez, V. Pino, 2018, RSC advances.

NON-LINEAR CALIBRATION IN QUANTITATIVE ANALYSIS BY HPTLC UTILIZING A FIBRE OPTIC FLUORESCENCE DETECTOR

J. H. Ayala, A. M. Afonso, V. González, 2000 .

Quantitative Analysis of Biogenic Amines by High-Performance Thin-Layer Chromatography Utilizing a Fibre Optic Fluorescence Detector

J. H. Ayala, A. M. Afonso, V. González, 1998 .

Determination of polycyclic aromatic hydrocarbons in marine sediments by high-performance liquid chromatography after microwave-assisted extraction with micellar media.

V. Pino, J. H. Ayala, A. M. Afonso, 2000, Journal of chromatography. A.

Exposure to heterocyclic aromatic amines from the consumption of cooked red meat and its effect on human cancer risk: A review

V. González, M. S. Alaejos, A. Afonso, 2008, Food additives & contaminants. Part A, Chemistry, analysis, control, exposure & risk assessment.

Monitoring chlorophenols in industrial effluents by solid-phase microextraction–gas chromatography–mass spectrometry

V. Pino, J. H. Ayala, A. M. Afonso, 2007 .

Focused microwave-assisted micellar extraction combined with solid-phase microextraction--gas chromatography/mass spectrometry to determine chlorophenols in wood samples.

V. Pino, V. González, A. Afonso, 2007, Analytica chimica acta.

An in-situ extraction-preconcentration method using ionic liquid-based surfactants for the determination of organic contaminants contained in marine sediments.

V. Pino, Jared L. Anderson, J. H. Ayala, 2012, Talanta.

Application of a Pillared-Layer Zn-Triazolate Metal-Organic Framework in the Dispersive Miniaturized Solid-Phase Extraction of Personal Care Products from Wastewater Samples

J. Pasán, C. Ruiz-Pérez, V. Pino, 2019, Molecules.

A magnetic-based dispersive micro-solid-phase extraction method using the metal-organic framework HKUST-1 and ultra-high-performance liquid chromatography with fluorescence detection for determining polycyclic aromatic hydrocarbons in waters and fruit tea infusions.

J. Pasán, C. Ruiz-Pérez, V. Pino, 2016, Journal of chromatography. A.

A guanidinium ionic liquid-based surfactant as an adequate solvent to separate and preconcentrate cadmium and copper in water using in situ dispersive liquid–liquid microextraction

Idaira Pacheco-Fernández, V. Pino, J. H. Ayala, 2018 .

Guanidinium ionic liquid-based surfactants as low cytotoxic extractants: Analytical performance in an in-situ dispersive liquid-liquid microextraction method for determining personal care products.

Idaira Pacheco-Fernández, V. Pino, J. H. Ayala, 2017, Journal of chromatography. A.

Metal-organic frameworks as novel sorbents in dispersive-based microextraction approaches

J. Pasán, V. Pino, A. M. Afonso, 2017 .

Monitoring polycyclic aromatic hydrocarbons in seawaters and wastewaters using a dispersive liquid–liquid microextraction method

V. Pino, A. M. Afonso, Carmen V Ramos-Dorta, 2013, Environmental technology.

In-situ ionic liquid-dispersive liquid-liquid microextraction method to determine endocrine disrupting phenols in seawaters and industrial effluents

V. Pino, J. H. Ayala, A. M. Afonso, 2011 .

A simplified vortex-assisted emulsification microextraction method for determining personal care products in environmental water samples by ultra-high-performance liquid chromatography

V. Pino, J. H. Ayala, A. M. Afonso, 2015 .

The metal-organic framework HKUST-1 as efficient sorbent in a vortex-assisted dispersive micro solid-phase extraction of parabens from environmental waters, cosmetic creams, and human urine.

J. Pasán, C. Ruiz-Pérez, V. Pino, 2015, Talanta.

Solid-phase microextraction coatings based on the metal-organic framework ZIF-8: Ensuring stable and reusable fibers.

R. Ameloot, J. Pasán, V. Pino, 2020, Talanta.

Headspace-single drop microextraction (HS-SDME) in combination with high-performance liquid chromatography (HPLC) to evaluate the content of alkyl- and methoxy-phenolic compounds in biomass smoke.

V. Pino, J. H. Ayala, A. M. Afonso, 2011, Talanta.

Optimization of an analytical methodology for the determination of alkyl- and methoxy-phenolic compounds by HS-SPME in biomass smoke

J. H. Ayala, A. M. Afonso, V. González, 2006, Analytical and bioanalytical chemistry.

Influence of Ligand Functionalization of UiO-66-Based Metal-Organic Frameworks When Used as Sorbents in Dispersive Solid-Phase Analytical Microextraction for Different Aqueous Organic Pollutants

J. Pasán, C. Ruiz-Pérez, V. Pino, 2018, Molecules.

Analytical Applications of Ionic Liquids in Chromatographic and Electrophoretic Separation Techniques

V. Pino, A. M. Afonso, M. J. Trujillo-Rodríguez, 2016 .

Ionic liquids as mobile phase additives in high-performance liquid chromatography with electrochemical detection: application to the determination of heterocyclic aromatic amines in meat-based infant foods.

V. Pino, J. H. Ayala, A. M. Afonso, 2009, Talanta.

Magnetic ionic liquids as non-conventional extraction solvents for the determination of polycyclic aromatic hydrocarbons.

V. Pino, Jared L. Anderson, J. H. Ayala, 2016, Analytica chimica acta.

Protolytic equilibria of indole and several indolecarboxylic acids in micellar media

V. González, A. Gonzalez, R. M. Linares, 1995 .

Solid-phase microextraction coupled with high-performance liquid chromatography for the analysis of heterocyclic aromatic amines.

J. H. Ayala, A. M. Afonso, V. González, 2004, Journal of chromatography. A.

Coupling the extraction efficiency of imidazolium-based ionic liquid aggregates with solid-phase microextraction-gas chromatography-mass spectrometry. Application to polycyclic aromatic hydrocarbons in a certified reference sediment.

V. Pino, Jared L. Anderson, A. M. Afonso, 2008, Journal of chromatography. A.

Micellar Extraction of Polycyclic Aromatic Hydrocarbons from Certified Marine Sediment

V. Pino, J. H. Ayala, A. M. Afonso, 2001 .

Determination of less polar heterocyclic amines in meat extracts: fast sample preparation method using solid-phase microextraction prior to high-performance liquid chromatography-fluorescence quantification.

J. H. Ayala, A. M. Afonso, V. González, 2007, Analytica chimica acta.

Focused Microwave‐Assisted Extraction and HPLC with Electrochemical Detection to Determine Heterocyclic Amines in Meat Extracts

V. Pino, J. H. Ayala, A. M. Afonso, 2007 .

Suitability of ionic liquids as mobile-phase additives in HPLC with fluorescence and UV detection for the determination of heterocyclic aromatic amines.

J. H. Ayala, A. M. Afonso, V. González, 2010, Journal of separation science.

Micelle-mediated extractions using nonionic surfactant mixtures and HPLC-UV to determine endocrine-disrupting phenols in seawaters

V. Pino, V. González, Jessica López-Darias, 2008, Analytical and bioanalytical chemistry.

Spectrofluorimetric determination of carbaryl and 1-naphthol in micellar media

V. González, A. Afonso, J. Ayala, 1991 .

Determination of water pollutants by direct-immersion solid-phase microextraction using polymeric ionic liquid coatings.

V. Pino, Jared L. Anderson, A. M. Afonso, 2010, Journal of chromatography. A.

Selective determination of acenaphthene in mixtures of three-ring polycyclic aromatic hydrocarbons by fluorescence quenching in micellar medium of cetylpyridinium bromide

J. H. Ayala, A. M. Afonso, V. G. Díaz, 1997, Journal of Fluorescence.

Fluorescence Quenching of Polycyclic Aromatic Hydrocarbons by Cetylpyridinium Bromide: Discrimination between Alternant and Nonalternant Hydrocarbons

V. González, A. Afonso, J. Ayala, 1997 .

Insights in the analytical performance of neat metal-organic frameworks in the determination of pollutants of different nature from waters using dispersive miniaturized solid-phase extraction and liquid chromatography.

J. Pasán, C. Ruiz-Pérez, V. Pino, 2018, Talanta.

1,5-bis-(2,3-dihydroxy-phenylmethylene)-thiocarbohydrazone as reagent for the spectrofluorimetric determination of nanogram amounts of gallium

M. González‐Dávila, A. M. Afonso, F. García-Montelongo, 1990 .

Pyrocatechol-1-Aldehyde 2-Benzothiazolylhydrazone As Reagent for the Spectrofluorimetric Determination of Nanogram Amounts of Gallium in Urine and Blood Serum

A. M. Afonso, F. G. Montelongo, J. J. Santana, 1985 .

Monitoring trihalomethanes and nitrogenous disinfection by-products in blending desalinated waters using solid-phase microextraction and gas chromatography

V. Pino, J. H. Ayala, A. M. Afonso, 2017, Environmental technology.

Automated direct-immersion solid-phase microextraction using crosslinked polymeric ionic liquid sorbent coatings for the determination of water pollutants by gas chromatography

C. Zhang, V. Pino, Jared L. Anderson, 2015, Analytical and Bioanalytical Chemistry.

Ionic liquids as a tool for determination of metals and organic compounds in food analysis

V. Pino, A. M. Afonso, Aurora Martín-Calero, 2011 .

Developing qualitative extraction profiles of coffee aromas utilizing polymeric ionic liquid sorbent coatings in headspace solid-phase microextraction gas chromatography–mass spectrometry

V. Pino, Jared L. Anderson, A. M. Afonso, 2011, Analytical and bioanalytical chemistry.

Estimation of Uncertainty in the Analysis of Carbonyl Compounds by HPLC‐UV Using DNPH Derivatization

Bárbara Delgado, V. González, A. Afonso, 2007 .

Evaluation of the Uncertainty Associated to the Determination of Heavy Metals in Seawater Using Graphite Furnace Atomic Absorption Spectrometry

V. Pino, V. González, A. Afonso, 2007 .

Double salts of ionic-liquid-based surfactants in microextraction: application of their mixed hemimicelles as novel sorbents in magnetic-assisted micro-dispersive solid-phase extraction for the determination of phenols

V. Pino, Jared L. Anderson, M. J. Trujillo-Rodríguez, 2015, Analytical and Bioanalytical Chemistry.

Vortex-assisted emulsification microextraction followed by in-syringe ultrasound-assisted back-microextraction to determine haloacetic acids in waters

V. Pino, J. H. Ayala, A. M. Afonso, 2014 .

Isolation and characterisation of glycopeptides from digests of human Tamm-Horsfall glycoprotein.

A. Afonso, 1981, Carbohydrate research.

Analysis of PAHs with HPLC.

C. Anyakora, V. González, A. Afonso, 2007 .

Effect of the inclusion of banana silage in the diet of goats on physicochemical and sensory characteristics of cheeses at different ripening times

V. Pino, J. García-Fraga, S. Álvarez, 2017 .

Optimization of a sampling method to determine polycyclic aromatic hydrocarbons in smoke from incomplete biomass combustion

J. H. Ayala, A. M. Afonso, V. González, 2004 .