Enginyeria Química i Química Analítica: Enviaments recents
Ara mostrant els elements 241-260 de 791
First application of carbon-based screen-printed electrodes for the voltammetric determination of the organic UV filters oxybenzone and octocrylene
A new voltammetric methodology is proposed for the simultaneous determination of the organic UV filters oxybenzone (benzophenone 3, BP3) and octocrylene (OC) in personal care products and in wastewater extracts.It is based ...
Lactate biosensing for reliable on-body sweat analysis
Wearable lactate sensors for sweat analysis are highly appealing for both the sports and healthcare fields. Electrochemical biosensing is the approach most widely used for lactate determination, and this technology generally ...
Unravelling the economics behind mainstream anaerobic membrane bioreactor application under different plant layouts
This research evaluated the economic feasibility of anaerobic membrane bioreactor (AnMBR) as a mainstream technology for municipal sewage treatment. To this end, different wastewater treatment plant (WWTP) layouts were ...
Organic acid profiling by liquid chromatography for the characterization of base vines and sparkling wines
A rapid and reliable method based on liquid chromatography with UV detection has been developed here to determine the main organic acids in base and sparkling wines of the protected designation of origin Cava. Compounds ...
Glicoproteínas biomarcadoras de cáncer: un reto analítico actual
Las alteraciones en la glicosilación de las proteínas pueden ser la causa de enfermedades graves, como es el caso de los desórdenes congénitos de la glicosilación (CDGs) o pueden aparecer en respuesta a la presencia de un ...
Evaluation of draw solutions and commercially available forward osmosis membrane modules for wastewater reclamation at pilot scale
An intensive evaluation of draw solutions (DS) was performed by focusing on the wastewater reuse applications of hybrid forward osmosis (FO) processes. The substances studied were potassium formate, potassium phosphate, ...
Process monitoring of moisture content and mass transfer rate in a fluidised bed with a low cost inline MEMS NIR sensor
Purpose The current trend for continuous drug product manufacturing requires new, affordable process analytical techniques (PAT) to ensure control of processing. This work evaluates whether property models based on spectral ...
Exploring the stabilizing effect on the i-motif of neighboring structural motifs and drugs
Cytosine-rich DNA sequences may fold into a structure known as i-motif, with potential in vivo modulation of gene expression. The stability of the i-motif is residual at neutral pH values. To increase it, the addition of ...
Green synthesis of Ag nanoparticles using grape stalk waste extract for the modification of screen-printed electrodes
The chemical synthesis of silver nanoparticles (Ag-NPs) by using an environmentally friendly methodology for their preparation is presented. Thus, considering that plants possess components that can act as reducing agents ...
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 ...
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) ...
Determination of dyes in candies in an analytical chemistry laboratory subject
The use of everyday life samples in laboratory subjects enhances motivation among students and, therefore, improves their learning outcomes. Candies are a common sample in students’ everyday life, which makes their dye ...
Photocatalytic degradation of sulfamethoxazole using TiO2 in simulated seawater: evidence for direct formation of reactive halogen species and halogenated by-products
Combined sewer overflows (CSO), generated during the wet weather flow from the combination of the inflow and stormwater runoff in sewer system, result in an overflow of untreated wastewater from sewer system, which might ...
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 ...
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> ...
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 ...
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 ...
A voltammetric electronic tongue based on commercial screen-printed electrodes for the analysis of aminothiols by differential pulse voltammetry
A voltammetric electronic tongue has been designed as a proof of concept for the analysis of aminothiols by differential pulse voltammetry and has been tested in ternary mixtures of cysteine (Cys), homocysteine (hCys) and ...
