A5114377330- Analytical chemistry methods development
- Electrochemical Analysis and Applications
- Mercury impact and mitigation studies
- Heavy metals in environment
- Trace Elements in Health
- Analytical Chemistry and Sensors
- Selenium in Biological Systems
- Water Quality Monitoring and Analysis
- Advanced Chemical Sensor Technologies
- Water Treatment and Disinfection
- Geochemistry and Elemental Analysis
- Radioactive element chemistry and processing
- Environmental Toxicology and Ecotoxicology
- Chemical Analysis and Environmental Impact
- Meat and Animal Product Quality
- Toxic Organic Pollutants Impact
- Pharmaceutical and Antibiotic Environmental Impacts
- Sulfur Compounds in Biology
- Marine animal studies overview
- Lichen and fungal ecology
- Mass Spectrometry Techniques and Applications
- Biosensors and Analytical Detection
- Animal Nutrition and Physiology
- Insect Utilization and Effects
Centro Tecnológico de Automoción de Galicia
2018
Universidade de Vigo
2004-2012
Centre National de la Recherche Scientifique
2010-2012
Institut des Sciences Analytiques et de Physico-Chimie pour l'Environnement et les Matériaux
2010
A new cold vapor technique within the context of green chemistry is described for determination mercury in liquid samples following high-intensity ultrasonication. Volatile Hg evolved a sonoreactor without use chemical reducing agent carried to quartz cell kept at room temperature measurement atomic absorption. The mechanism involved lies reduction Hg(II) Hg(0) by gases formed upon sonication and subsequent volatilization due degassing effect caused cavitation phenomenon. Addition low...
Strong cation exchange HPLC with the parallel ICP MS and electrospray hybrid linear ion trap quadrupole orbital mass spectrometry (ESI Orbitrap MS) detection was developed for study of metabolomic pattern selenium in selenium-rich yeast. The mobile phase composition (gradient ammonium formate 20% methanol) optimized to obtain separation conditions guaranteeing identical sensitivity during entire chromatographic run compatibility ionization. Twenty seven Se-containing metabolites observed...
A method was developed for the comprehensive cartography of selenium metabolites synthesized in process conversion selenite [Se(iv)] into organic compounds and enrichment yeast with selenium. The number detected considerably increased (49) owing to optimization fractionation procedure use UPLC. purity minor selenoorganic amino acids oligopeptides allowed successful on-line de-novo identification based on exact mass (<1 ppm) fragmentation (MS2/MS3) spectra obtained high resolution accuracy....
Beef is a highly nutritious and valuable food. In order to complete its nutritional information, this study determined the chemical physicochemical parameters fatty acid, amino acid mineral contents in seven primal cuts from veal carcasses (shoulder clod (SC), inside round (IR), eye of (ER), bottom (BR), heel (HR), knuckle (KK) tenderloin (TL)).The intramuscular fat content was higher cholesterol lower TL than other cuts. The colour also varied different L* b* values were highest ER. Cooking...
A new method is described for the determination of thiomersal (i.e., a stabilizing agent) in eye-drop solutions by sono-induced cold vapour generation-atomic absorption spectrometry following an UV/H2O2 advanced oxidation process. green methodology has been developed that eliminates need both strong oxidising conditions degradation and conventional chemical reducing agents, such as tin chloride or sodium tetrahydroborate(III), generation. Conversion into Hg(II) performed under 10 min UV...
Photo-chemical vapour generation has been applied in a flow-injection system under stopped-flow conditions for determination of Hg by atomic absorption spectrometry. The allows mercury without the need conventional reduction reactions based on sodium/potassium tetrahydroborate (III) or tin chloride acid medium. photo-induced reaction is accomplished applying ultraviolet irradiation (UV) to sample solution containing Hg(II) presence an organic (i.e., acetic, citric, oxalic,...
Ultrasound-assisted extraction (UAE) is introduced to upper-level analytical chemistry students as a simple strategy focused on sample preparation for trace-metal determination in biological tissues. Nickel seafood samples and quantification by electrothermal atomic absorption spectrometry (ETAAS) are carried out team of four students. The experiment covers (i) the study variables influencing process (sonication time, ultrasound amplitude, acid concentration, particle size, mass) selection...
A speciation method based on Chelex-100 titration in combination with electrothermal-atomic absorption spectrometry has been developed to study the distribution of Pb among different fractions coastal seawater. The allows an accurate determination total Pb, thereby avoiding effect saline matrix. Additionally, patterns species lability can be established seawater as a function pH. Four have obtained model and two samples from Ria de Vigo (NE Atlantic ocean), i.e. free ion, inorganic fraction,...