Enginyeria Química i Química Analítica: Envíos recientes
Mostrando ítems 281-300 de 791
Honey fraud detection based on sugar syrup adulterations by HPLC-UV fingerprinting and chemometrics
In recent years, honey-producing sector has faced the increasing presence of adulterated honeys, implying greateconomic losses and questioning the quality of this highly appreciated product by the society. Due to the ...
Assessing sorption of fluoroquinolone antibiotics in soils from a Kdcompilation based on pure organic and mineral components
The presence of fluoroquinolone (FQ) antibiotics in soils may cause a threat to human health due to overexposure and the generation of antibiotic resistance genes. Understanding their sorption behavior in soils is important ...
Accurate determination of the milk protein allergen β-lactoglobulin by on-line aptamer affinity solid-phase extraction capillary electrophoresis-mass spectrometry
An on-line aptamer affinity solid-phase extraction capillary electrophoresis-mass spectrometry (AA-SPE-CE-MS) method was developed to purify, preconcentrate, separate, and characterize the milk allergenic protein β-lactoglobulin ...
Total polyphenol content in food samples and nutraceuticals: antioxidant indices versus high performance liquid chromatography
The total content of polyphenols and the antioxidant capacity have been estimated in various food and nutraceutical samples including cranberry, raspberry, artichoke, grapevine, green tea, coffee, turmeric, and other ...
Adsorption of benzophenone-3 and octocrylene UV filters on polyethylene:analysis by HPLC-MS/MS and voltammetry with screen-printed electrodes
Microplastics (MPs) are persistent pollutants that can adsorb contaminants, facilitating their accumulation inaquatic ecosystems. The presence of UV filters (UVFs) such as benzophenone-3 (BP3) and octocrylene (OC),exacerbates ...
Commercial screen-printed electrodes based on carbon nanomaterials for a fast and cost-effective voltammetric determination of paracetamol, ibuprofen and caffeine in water samples
Carbon screen-printed electrode (SPCE), multi-walled carbon nanotubes modified screen-printed electrode (SPCNTE), carbon nanofibers modified screen-printed electrode (SPCNFE), and graphene modified screen-printed electrode ...
Phenolic Composition, Antioxidant Capacity and Antiproliferative Activity of Ten Exotic Amazonian fruit
The socioeconomic, cultural, therapeutic, and nutritional potential of Amazonian fruits has been limited due to the scarce information about its phytochemical profile. The aim of this study was to determine the total ...
Co-digestion of sewage sludge and food waste in a wastewater treatment plant based on mainstream anaerobic membrane bioreactor technology: A techno-economic evaluation
The implementation of anaerobic membrane bioreactor as mainstream technology would reduce the load of sidestream anaerobic digesters. This research evaluated the techno-economic implications of co-digesting sewage sludge ...
On-line aptamer affinity solid-phase extraction direct mass spectrometry for the rapid analysis of α-synuclein in blood
On-line aptamer affinity solid-phase extraction direct mass spectrometry (AA-SPE-MS) is presented for the rapid purification, preconcentration, and characterization of α-synuclein (α-syn), which is a protein biomarker ...
A critical retrospective and prospective review of designs and materials in in-line solid-phase extraction capillary electrophoresis
Several strategies have been developed to decrease the concentration limits of detection (LODs) in capillary electrophoresis (CE). Nowadays, chromatographic-based preconcentration using a microcartridge integrated in the ...
LINEAR UNMIXING PROTOCOL FOR HYPERSPECTRAL IMAGE FUSION ANALYSIS APPLIED TO A CASE STUDY OF VEGETAL TISSUES
Hyperspectral imaging (HSI) is a useful non-invasive technique that offers spatial and chemical information of samples. Often, different HSI techniques are used to obtain complementary information from the sample by combining ...
Improvement of the photo-Fenton process at natural condition of pH using organic fertilizers mixtures: Potential application to agricultural reuse of wastewater
Five organic fertilizers (DTPA, EDDHA, HEDTA, EDTA and EDDS) were studied as iron sources for photo-Fenton process at natural pH to remove micropollutants (MPs) from wastewater for its reuse in irrigation. The results ...
Ammoniacal nitrogen recovery from swine slurry using a gas-permeable membrane: pH control strategies and feed-to-trapping volume ratio
Gas-permeable membrane (GPM) technology is gaining interest to recover nitrogen from residual effluents due to its effectiveness, simple operation and capacity of producing a nutrient rich product with fertilising value. ...
Authentication of Cocoa Products Based on Profiling and Fingerprinting Approaches: Assessment of Geographical, Varietal, Agricultural and Processing Features
Cocoa and its derivative products, especially chocolate, are highly appreciated by consumers for their exceptional organoleptic qualities, thus being often considered delicacies. They are also regarded as superfoods due ...
A simple model to describe the thixotropic behavior of paints.
We propose a simple rheological model to describe the thixotropic behavior of paints, since the classical hysteresis area, which is usually used, is not enough to evaluate thixotropy. The model is based on the assumption ...
Proteómica shotgun para la caracterización integral de granos de quinoa: una herramienta prometedora en el campo de la inmunonutrición
Este artículo presenta una estrategia proteómica basada en la utilización de la cromatografía de líquidos acoplada a la espectrometría de masas en tándem (LC-MS/MS), en combinación con el entorno de trabajo, para caracterizar ...
Potential of High-Performance Liquid Chromatography with Ultraviolet Detection (HPLC-UV) Fingerprints to Assess the Geographical Production Origin and Authenticity of Honey
Honey is a widely appreciated and consumed natural product which is highly susceptible to fraudulent practices involving different sample attributes such as the botanical species or the geographical production regions, as ...
Mercury films on commercial carbon screen-printed devices for the analysis of heavy metal ions: a critical evaluation
The suitability of mercury films on commercial screen-printed electrodes for the analysis of heavy metal ions is critically tested for the particular case of Pb(II)-ions. Although determination is possible by anodic stripping ...
El residu: paràbola de la maionesa i l'allioli
...I posant-se enmig dels seus deixebles, els va proposar aquesta paràbola: El regne dels homes és semblant a un jove príncep que heretà un palau i, per celebrar-ho, preparà un gran banquet per a tots els seus amics. Disposà ...
Ultra-trace analysis of cyanotoxins by liquid chromatography coupled to high-resolution mass spectrometry
The increasing frequency of episodes of harmful algal blooms of cyanobacterial origin is a risk for ecosystems and human health. The main human hazard may arise from drinking water supply and recreational water use. For ...
