A5085153055- Heavy metals in environment
- Analytical chemistry methods development
- Mercury impact and mitigation studies
- Heavy Metals in Plants
- Electrochemical Analysis and Applications
- Antioxidant Activity and Oxidative Stress
- Clay minerals and soil interactions
- Microplastics and Plastic Pollution
- Heavy Metal Exposure and Toxicity
- Forensic Fingerprint Detection Methods
- Radioactivity and Radon Measurements
- Bee Products Chemical Analysis
- Academic Research in Diverse Fields
- Recycling and Waste Management Techniques
- Water Quality and Pollution Assessment
- Pesticide Residue Analysis and Safety
- Environmental Toxicology and Ecotoxicology
- Advanced Chemical Sensor Technologies
- Environmental Sustainability and Education
- Physiological and biochemical adaptations
- Nuts composition and effects
- Peanut Plant Research Studies
- Coconut Research and Applications
- Risk Perception and Management
- Soil Moisture and Remote Sensing
Universidade Federal de Santa Maria
2016-2024
Universidade Tecnológica Federal do Paraná
2012
A DLLME method for extraction and preconcentration of Cd Pb from soft drinks further determination by GF AAS was developed. Important parameters such as the type volume dispersive solvents, concentration DDTC (complexing agent) pH were evaluated. Better results obtained using 500 μL acetone 700 acetonitrile 60 CCl4 solvent both analytes 1.5% solution. Accuracy evaluated recovery assays ranged 91 to 113% 95 108% Pb, with RSD below 10 7%, respectively. The LODs 0.006 0.072 ng L−1 optimized...
Brazilian territory is vast and mostly of the soil are acidic poor in macronutrients (NPK). As a result, it necessary to use high amounts fertilizers ensure good productivity. Extraction available K from usually done using Mehlich-1 solution determination by inductively coupled plasma optical emission spectrometry (ICP OES). This work proposes simple robust method for extraction, allowing its fast practical way electrode ion selective (ISE-K), low volume less toxic reagents, aiming be...
The present study aims to evaluate the bioavailability of Hg and Se in blacktip shark, Asian tiger shrimp squid tube samples after three culinary treatments: boiling, frying sautéing. Cooked uncooked were evaluated for each seafood species with without addition spices (salt, lemon juice garlic). After treatment, freeze-dried, ground stored further analysis. following parameters optimized: sample mass, size, cooking time temperature. determination total concentration was carried out by...
A method for determining low levels of As and Cd by dispersive liquid-liquid microextraction (DLLME) inductively coupled plasma mass spectrometry (ICP-MS) was proposed.The following parameters that affect extraction efficiency were investigated: type volume solvent (1000 µL acetone), (75 carbon tetrachloride), amount ammonium pyrrolidinedithiocarbamate sodium diethyldithiocarbamate as chelating agents, sample (0.5 g in 10 mL ultrapure water), pH solution (2.0) number washing steps...
A low cost turbidimetric sensor was developed and applied for available potassium determination in soil.
<p>The Brazil nut is a grown in the Amazon region, with high caloric and proteic content. This contains selenium phenolic compounds antioxidant properties, which are widely used to combat free radicals responsible for premature aging degenerative diseases. The objective of this work was evaluate activity antimicrobial potential <em>Bertholletia excelsa</em> nuts. To determine employed method DPPH radical sequestration. determined by agar diffusion Gram-positive bacteria...