Francisco Barahona

Francisco Barahona
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria | INIA · Department of Environment

Doctor of Philosophy

About

17
Publications
3,431
Reads
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836
Citations
Citations since 2017
4 Research Items
555 Citations
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2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
2017201820192020202120222023020406080100
Introduction
Francisco Barahona currently works at the Centro Nacional de Alimentación (CNA), Agencia Española de Seguridad Alimentaria y Nutrición (AESAN) / National Center for Food, Food Safety and Nutrition Agency. Francisco does research in Analytical Chemistry, Food Contact Materials and Nanotechnology.
Additional affiliations
November 2016 - present
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
Position
  • Researcher
September 2013 - September 2016
European Commission
Position
  • PostDoc Position
March 2013 - August 2013
Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria
Position
  • Researcher

Publications

Publications (17)
Article
In the present work, the preparation of a new selective molecularly imprinted polymer (MIP) for the family of fluoroquinolones (FQs) in the pores of polypropylene hollow fibers (HFs) is proposed. The resulting MIP-HFs, which combine solid-phase microextraction (SPME) and molecular imprinting technologies, were used to develop a selective microextra...
Article
Full-text available
Single particle-inductively coupled plasma mass spectrometry (SP-ICPMS) is a promising technique able to generate the number based-particle size distribution (PSD) of nanoparticles (NPs) in aqueous suspensions. However, SP-ICPMS analysis is not consolidated as routine-technique yet and is not typically applied to real test samples with unknown comp...
Article
In this work, novel molecularly imprinted polymer-coated hollow fibers (MIP-HFs) have been prepared and evaluated for the development of a micro-solid phase extraction method for the analysis of triazines in aqueous samples using high performance liquid chromatography and UV detection. The proposed extraction method combines liquid-liquid microextr...
Article
Full-text available
The present work offers a simple, reliable and scalable seeding-growth methodology to prepare silica nanoparticles (SiO2 NPs) (20, 30, 50 and 80 nm) directly in aqueous phase, both as plain- as well as fluorescent-labelled silica. The amount of fluorescent label per particle remained constant regardless of size, which facilitates measurements in te...
Article
Full-text available
Synthetic amorphous silica (SAS) has been used as food additive under the code E551 for decades and the agrifood sector is considered a main exposure vector for humans and environment. However, there is still a lack of detailed methodologies for the determination of SAS' particle size and concentration. This work presents the detection and characte...
Article
This work proposes the use of multimodal mixtures of monodispersed silica nanoparticles (SiO2-NPs) standards for the simultaneous determination of size and concentration of SiO2-NPs in aqueous suspensions by asymmetric flow field-flow fractionation (AF4) coupled to inductively coupled plasma mass spectrometry (ICPMS). For such a purpose, suspension...
Article
Full-text available
Electronic cigarettes have achieved growing popularity since their introduction onto the European market. They are promoted by manufacturers as healthier alternatives to tobacco cigarettes, however debate among scientists and public health experts about their possible impact on health and indoor air quality means further research into the product i...
Article
In this work, molecularly imprinted polymer (MIP) beads have been prepared and evaluated for the development of a supported liquid membrane-protected micro-solid phase extraction method for the analysis of sulfonamides (SAs) in aqueous samples. The performance of MIP beads was firstly evaluated in cartridges by conventional solid-phase extraction f...
Article
Full-text available
We present a new format of apta-sensing composite particles for Surface-Enhanced Raman Spectroscopy (SERS) detection of malathion. These apta-sensing microspheres acquire their extraction capability through aptamer-target analyte interaction and Raman signal enhancement for SERS detection of the pesticide. Micron-sized polymer particles were synthe...
Article
In this paper, a novel format for selective solid-phase extraction based on a molecularly imprinted polymer (MIP) is described. A small amount of MIP has been synthesized within the pores of commercial polyethylene (PE) frits and attached to its surface using benzophenone (BP), a photo-initiator capable to start the polymerisation from the surface...
Article
In this work, molecularly imprinted polymer fibres (MIP-fibre) have been prepared and evaluated for solid-phase microextraction (SPME), using thiabendazole (TBZ) as template. Inherent limitations of molecular imprinted polymers, such as target recognition in aqueous media, have been solved with the use of organic supported liquid membrane (SLM) pro...
Article
Full-text available
Linear nonylphenol (4-n-NP), nonylphenol isomers (NP), and NP short chain ethoxylated derivates (NPEO1 and NPEO2) show a wellreported endocrine disrupting activity due to their ability to mimic natural estrogens of living organisms. In this work, two methodologies were developed for the simultaneous extraction and determination of NP, 4-n-NP, long...
Article
In this work, the synthesis of molecularly imprinted polymer microspheres with narrow particle size distributions and core-shell morphology by a two-step precipitation polymerization procedure is described. Polydivinylbenzene (poly DVB-80) core particles were used as seed particles in the production of molecularly imprinted polymer shells by copoly...
Article
In this work, two different surface imprinting formats have been evaluated using thiabendazole (TBZ) as model template. The first format is a thin film of molecularly imprinted polymer (MIP) grafted from preformed silica particles using an immobilized iniferter-type initiator (inif-MIP). The second format is molecularly imprinted polymer microspher...
Article
Liquid-phase microextraction (LPME) based on polypropylene hollow fibers was evaluated for the extraction of the post-harvest fungicides thiabendazole (TBZ), carbendazim (CBZ) and imazalil (IMZ) from orange juices. Direct LPME was performed without any sample pretreatment prior to the extraction, using a simple home-built equipment. A volume of 500...

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Projects

Projects (2)
Archived project
Development of liquid-phase microextraction (LPME): a) New LPME-based concepts b) Forefront applications c) Fundamental understanding d) Commercial products