Enginyeria Química i Química Analítica: Envíos recientes
Mostrando ítems 341-360 de 791
Voltammetric determination of sulfamethoxazole using commercial screen-printed carbon electrodes
A differential pulse voltammetric (DPV) method using commercial screen-printed carbon electrodes (SPCE) is developed for a fast and cost-effective determination of the antibiotic sulfamethoxazole (SMX). Optimal measurements ...
Process modeling and control applied to real-time monitoring of distillation processes by near-infrared spectroscopy
A distillation device that acquires continuous and synchronized measurements of temperature, percentage of distilled fraction and NIR spectra has been designed for real-time monitoring of distillation processes. As a process ...
Effect of ultrasonication on waste activated sludge rheological properties and process economics
The present study provides an overall view of the effect of the ultrasound treatment on waste activated sludge (WAS) rheological and dewatering properties as well as its impact on the economic balance of a theoretical ...
Characterization, Classification and Authentication of Honey by Non-Targeted UHPLC-HRMS Chromatographic Fingerprints and Chemometric Methods
Honey is a natural substance produced by bees of the genus Apis. Depending on the raw material used for its production, honey can be classified into two large groups: blossom honey, which results from the metabolization ...
Phase behavior and rheological analysis of reverse liquid crystals and W/I2, W/H2 gel emulsions using an amphiphilic block copolymer.
This article reports the phase behavior determi- nation of a system forming reverse liquid crystals and the formation of novel disperse systems in the two-phase region. The studied system is formed by water, cyclohexane, ...
Application of liquid chromatography in food analysis. Editoral
Food products are very complex mixtures consisting of naturally-occurring compounds and other substances, generally originating from technological processes, agrochemical treatments, or packaging materials. Several of these ...
Examining sorption of perfluoroalkyl substances (PFAS) in biochars and other carbon-rich materials
The use of carbon-rich sorbents to remove and/or immobilize perfluoroalkyl substances (PFAS) in contaminated environmental scenarios is attracting increasing interest. The identification of key sorbent properties responsible ...
Vibrating boron-doped diamond electrode: a new, durable and highly sensitive tool for the detection of cadmium
In this paper, a vibrating boron-doped diamond (BDD) electrode electroanalytical device and respective method for the analysis of ultralow concentrations of Cd(II) in water were studied. The enhanced mass transfer on the ...
Sex differences in the association between long-term ambient particulate air pollution and the intestinal microbiome composition of children
The intestinal microbiome is essential for gastrointestinal and overall health, yet its response to air pollution in children remains underexplored. In a study involving 412 young children from the ENVIRONAGE cohort, stool ...
A new method based on selective fluorescent polymers (PSresin) for the analysis of 90Sr in presence of 210Pb in environmental samples
90Sr is of major concern in emergency and environmental control plans. It is one of the main fission products in nuclear facilities and is a high-energy beta emitter that presents chemical properties similar to those of ...
Integrated reaction-separation processes sequencing and screening at early stages of design
Process intensification and selection of the most efficient chemical process provides resources conservation and decreases the energy consumption to minimize CO2 emissions. Distillation Sequence Efficiency (DSE) method is ...
Field amplified sample injection-capillary zone electrophoresis for the analysis of amprolium in eggs
Veterinary medicines are widely administered to farm animals since they keep animals healthy at overcrowded conditions. Nevertheless the continuous administration of medicines to farm animals can frequently lead to the ...
Vortex shedding from a spinning cylinder
An experimental investigation of a two-dimensional turbulent wake behind a spinning cylinder at Re=9000 is carried out to determine the influence of the rotation on the initial development of the flow. Spectral analysis ...
Coffee Husk and Lignin Revalorization: Modification with Ag Nanoparticles for Heavy Metals Removal and Antifungal Assays
This study presents the use of the modified coffee husk and coffee lignin as sorbents in the heavy metal ions sorption of Pb(II), Cd(II), Cr(III), and Cu(II) in an aqueous solution. The modification of sorbents was carried ...
RBD-Based ELISA and Luminex Predict Anti-SARS-CoV-2 Surrogate-Neutralizing Activity in Two Longitudinal Cohorts of German and Spanish Health Care Workers
The ability of antibodies to neutralize severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is an important correlate of protection. For routine evaluation of protection, however, a simple and cost-efficient ...
Novel instrument for automated pKa determination by internal standard capillary electrophoresis
The internal standard capillary electrophoresis method (IS-CE) has been implemented in a novel sequential injection−capillary electrophoresis instrument for the high-throughput determination of acidity constants (pKa) ...
Tutorial on modelling chromatographic surrogation of biological processes
The accurate emulation of biological partition systems through physicochemical models is crucial in pharmacology,</p><p>toxicology, and environmental science for understanding the ADMET profiles of substances. Direct</p> ...
Enantiodetermination of R,S-3,4-methylenedioxypyrovalerone in urine samples by high pressure in-line solid-phase extraction capillary electrophoresis-mass spectrometry
This study presents for the first time an in-line solid-phase extraction capillary electrophoresis-mass spectrometry (SPE-CE-MS) method for the enantiodetermination of drugs of abuse in urine samples. The enantioseparation ...
Equilibrio de intercambio iónico en el ablandamiento de agua con resinas sulfónicas en forma sódica
Se ha esttrdiado el equilibrio de intercambio iónico Ca2+/Na+ con resina sulfónica (IMAC C-12) y en disoluciones de salinidad (0,010 N de Ca2+ y 0,019 N total) análoga a la del agua potabilizada de Barcelona procedente del ...
Detection and quantitation of frauds in the authentication of cranberry-based extracts by UHPLC-HRMS (Orbitrap) polyphenolic profiling and multivariate calibration methods
UHPLC-HRMS (Orbitrap) polyphenolic profiling was applied to the characterization, classification and authentication of cranberry-based natural and pharmaceutical products. 53 polyphenolic standards were characterized to ...
