Enginyeria Química i Química Analítica: Recent submissions
Now showing items 1-20 of 790
New macroporous support for the preparation of plastic scintillation resins
<p>PSresins have arisen in the past years as a promising material for the measurement of radioactivity. PSresins are a</p><p>material composed of a PSm support coated with a selective extractant on its surface, allowing ...
Optimization of the One-Pot Synthesis of Butyl Levulinate from Fructose and 1-Butanol
The one-pot synthesis of butyl levulinate from fructose and 1- butanol has been optimized using the ion-exchange resin Dowex 50Wx2 as a catalyst in a batch reactor. The effects of temperature (120−150 °C), initial quantity ...
Simultaneous radionuclide determination using PSresin: 2in2 and 2in1 tandem configuration
Background: Analyzing mixtures of radionuclides is a complex task. Two situations are the mixtures of 89Sr with 90Sr and 90Sr with plutonium isotopes. The challenge arises in emergency scenarios resulting from accidents ...
Fotoionización a presión atmosférica para el análisis de compuestos halogenados mediante Cromatografía de gases-espectrometría de masas
Durante años, la determinación de una gran variedad de contaminantes orgánicos persistentes halogenados se ha llevado a cabo mediante el acoplamiento GC-MS, utilizando generalmente técnicas de ionización de alto vacío, com ...
Identification and characterization of isomeric N-glycans of human alfa-acid-glycoprotein by stable isotope labelling and ZIC-HILIC-MS in combination with exoglycosidase digestion
In this study, a ZIC-HILIC-MS methodology for the analysis of N-glycan isomers was optimized to obtain greater detection sensitivity and thus identify more glycan structures in hAGP. In a second step, this method was ...
Prenatal exposure to persistent organic pollutants and sex-specific neonatal outcomes in the ENVIRONAGE birth cohort.
Early-life exposure to environmental contaminants, such as endocrine disrupting persistent organic pollutants (POPs), including polychlorinated biphenyls (PCBs), polybrominated diphenyl ethers (PBDEs) and organochlorine ...
An expanded framework for Swab Touch Spray-Mass Spectrometry towards the detection of allergenic protein residues on food preparation surfaces
Background Ambient Mass Spectrometry (AMS) encompasses a group of techniques that have emerged as powerful strategies for direct, in-situ and high-throughput analysis, also in compliance with the principles of green ...
Progress on the Link between Nutrient Availability and Toxin Production by Ostreopsis cf. ovata: Field and Laboratory Experiments
This study aimed to improve the understanding of the nutrient modulation of Ostreopsis cf. ovata toxin content. During the 2018 natural bloom in the NW Mediterranean, the total toxin content (up to ca. 57.6 ± 7.0 pg toxin ...
Characterization of HPLC columns: a comparison of Tanaka and Abraham methods
Characterization of the selectivity of HPLC columns is an essential need in many chromatographic development methods. Different tests and procedures have been developed for this purpose. In this paper, we analyze two of ...
Towards biomimetic electrochromatography: Fast method for the Abraham's characterization of solute-solvent interactions in micellar and microemulsion electrokinetic systems
This study presents a fast method for the characterization of solute-solvent interactions in micellar and microemulsion electrokinetic chromatography based on the linear solvation energy relationships proposed by Abraham. ...
Development and validation of an LC-MS/MS method for the simultaneous detection of urinary inflammatory biomarkers in a Flemish birth cohort
Chronic inflammation is a significant contributor to various diseases but its assessment via blood sampling presents challenges, particularly in children. The evaluation of urinary biomarkers, including 3-bromotyrosine ...
Effect of prechlorination prior to activated carbon adsorption on trihalomethanes formation during final disinfection
Granular Activated Carbon (GAC) is commonly used in water treatment for the removal of Dis-solved Organic Matter (DOM) and diminution of the formation of Disinfection By-Products (DBP)during final disinfection. The aim of ...
Analysing polypeptide antibiotics residues in animal muscle tissues: The crucial role of HRMS
High resolution mass spectrometry (HRMS) has undergone an exciting phase of technological evolution. Time of flight instruments with significantly higher resolution and larger dynamic range have become available. Furthermore, ...
Analytical methods for cinnamon authentication
Cinnamon is a widely marketed spice used in worldwide cuisines and medicinal applications. Although Cinnamomum verum is considered as “true cinnamon”, other cinnamon species (particularly Cinnamomum cassia) are also ...
Application of HPLC-UV combined with chemometrics for the detection and quantification of ‘true cinnamon’ adulteration
Cinnamon is one of the most popular spices used in cuisines worldwide. Among its different species, Ceylon cinnamon (“true cinnamon") is the one with the most health benefits due to its high concentration in the antioxidant ...
Application of Raman and chemometrics to the mechanochemical synthesis of 4,4-bipyridine/cobalt based MOF using twin screw extrusion
The process optimization of 4,4-bipyridine based metal organic framework (MOF) synthesis by twin screw extrusion (TSE) is investigated using cobalt nitrate hexahydrate (Co(NO3)2·6H2O) as the metal precursor. The effects ...
Integrated Biofilm Dispersion and Virulence Responsiveness for Targeted Treatment of Pseudomonas aeruginosa Infection in Lungs
The self-organization of microbes into biofilms provides multiple benefits including tolerance to mechanical stress and resistance to immune defences and antibiotics. Coupled to a compromised mucociliary function, these ...
Study of Total Ammoniacal Nitrogen Recovery Using Polymeric Thin-Film Composite Membranes for Continuous Operation of a Hybrid Membrane System
This study examined total ammoniacal nitrogen (TAN) rejection by two reverse osmosis (RO) and two nanofiltration (NF) membranes as a function of pH for three ammonium salts to optimize conditions for a hybrid membrane ...
PET-Driven Fluorescence Modulation in Halochromic Styryl Hemicyanine Dyes Targeting DNA Minor Groove
A new series of styryl hemicyanine dyes featuring substituted N-phenylpiperazine end groups was synthesized using an environmentally friendly procedure. The photophysical properties of the dyes were systematically investigated ...
Construction and validation of parametric models to predict radiumsorption in soils
Elucidating the factors affecting the transfer of naturally occurring radionuclides (NOR) between environmental compartments is a key part of the assessment of ecosystem's exposure to naturally occurring radionuclide ...
