A5051314403- Analytical chemistry methods development
- Laser-induced spectroscopy and plasma
- Cultural Heritage Materials Analysis
- Mercury impact and mitigation studies
- Adsorption and biosorption for pollutant removal
- Heavy metals in environment
- Soil and Environmental Studies
- Fungal Biology and Applications
- Botanical Research and Applications
- Chromium effects and bioremediation
- Metallurgical Processes and Thermodynamics
- Marine and environmental studies
- Geological Studies and Exploration
- Extraction and Separation Processes
- Selenium in Biological Systems
- Heavy Metals in Plants
- Medical and Biological Ozone Research
- Nanomaterials for catalytic reactions
- Environmental remediation with nanomaterials
Universidade de São Paulo
1994-2021
Instituto de Geofísica y Astronomía
1994
Laser-induced breakdown spectroscopy (LIBS) is a multi-elemental technique with multiple advantages. However, direct determination in liquid samples not an easy task since laser water interaction can affect the precision and accuracy of method cause loss sensitivity. To enable LIBS application sample analysis, some strategies such as liquid-to-solid transfer have been used. This work proposes quantification chromium by using ceramic solid support. Results showed that selectively adsorbs...
Calibration aiming at quantitative analysis of complex samples is one the most difficult issues in laser-induced breakdown spectroscopy (LIBS) due to matrix interferences, heterogeneity, and sample particle size effects.
The direct analysis of high silicon content samples by Laser-Induced Breakdown Spectrometry (LIBS) is a good alternative, since the decomposition with refractory characteristics not an easy task.
Due to matrix interference and sample particle size effects, some of the most important difficult issues in laser‐induced breakdown spectroscopy (LIBS) analysis are calibration quantitative measurement a complex matrix. This study proposes use borate fusion as an alternative preparation procedure for Al, Fe, Si Ti bauxite by LIBS. Analytical curves were made using certified reference materials (CRM), precision accuracy methods evaluated analysing additional CRM, two different approaches:...
Selenium is an important element in physiological and metabolic processes. Due to low Se concentration most of the soils, strategies as enrichment biofortification have been used increase its incorporation food. The fungus has capacity absorb, accumulate transform inorganic into organic compounds. However, chemical forms for can affect mycelial growth mushrooms production. Thus, aim this study was analyze Pleurotus ostreatus tolerate growing concentrations different forms. In disc agar with...
Açaı́ consumption has been increasing due to the health benefits associated with levels of essential elements and bioactive compounds, such as phenols flavonoids. However, any nutritional information needs go beyond that for total elemental levels, bioaccessibility data this food should also be highlighted. In study, in two different genotypes açaı́ pulp (white purple) was evaluated. The vitro gastrointestinal digestion followed by determination using inductively coupled plasma optical...