A5075967902- Analytical chemistry methods development
- Laser-induced spectroscopy and plasma
- Mass Spectrometry Techniques and Applications
- Banana Cultivation and Research
- Electrochemical Analysis and Applications
- Mercury impact and mitigation studies
- Salivary Gland Disorders and Functions
- Recycling and Waste Management Techniques
- Extraction and Separation Processes
- Brazilian Legal Issues
- Acne and Rosacea Treatments and Effects
- Water Quality Monitoring and Analysis
- Radioactive element chemistry and processing
- Youth, Drugs, and Violence
- Oral health in cancer treatment
- Fault Detection and Control Systems
- Spectroscopy and Chemometric Analyses
- Laser Applications in Dentistry and Medicine
- Science and Education Research
- T-cell and Retrovirus Studies
- Herpesvirus Infections and Treatments
- Hepatitis B Virus Studies
- Silicon Effects in Agriculture
- Viral Infectious Diseases and Gene Expression in Insects
- Aluminum toxicity and tolerance in plants and animals
Brazilian Agricultural Research Corporation
2016-2025
Universidade Federal de São Carlos
2002-2024
National Institute of Amazonian Research
2023
Université Paris Cité
2020
Universidade Federal do Ceará
2020
Hospital Vila Franca de Xira
2016-2018
Universidade Federal do Rio de Janeiro
2018
Universidade Federal do Rio Grande
2017
Fundação Oswaldo Cruz
2006-2008
In recent decades, direct solid sample analysis has been reported in the literature as an alternative to traditional methods of preparation, becoming well established atomic spectrometry field.
An analytical method was developed for determination of Cd, Sn, Pd, Pt and Rh in sediments, fertilizer sludge samples by inductively coupled plasma tandem mass spectrometry (ICP-MS/MS). The performance ICP-MS/MS using oxygen into the octopole reaction system (ORS3) MS/MS mode, on shift mass, evaluated to overcome spectral interferences. Addition recovery experiments at three concentration levels, 0.5, 1.0 5.0 μg L− 1, were carried out evaluate accuracy procedure. Quantitative recoveries,...
Multi-energy calibration was used to determine As, Ba, Cd, Cr, and Pb in fertilizers by MIP OES.
A microwave-induced plasma optical emission spectrometer with N2-based was combined a multimode sample introduction system (MSIS) for hydride generation (HG) and multielemental determination of As, Bi, Ge, Sb, Sn in samples forage, bovine liver, powdered milk, agricultural gypsum, rice, mineral fertilizer, using single condition prereduction reduction. The accuracy the developed analytical method evaluated certified reference materials water recoveries ranged from 95 to 106%. Addition...
In this study, a reference material (RM) for inorganic constituents in PCB samples was prepared and leaching procedure its characterization developed.
POTENTIALITIES.This review attempts to present a broad view of the technique laser-induced breakdown spectroscopy (LIBS), since its origin, fundamentals, sample preparation strategies, use chemometric tools for data processing, advantages and limitations with regard qualitative quantitative analysis, aplications future trends as an analytical that is in consolidation chemistry.LIBS rapid versatile, which able providing information practically any sample, virtually non-destructive way,...
In many cases involving the management of technological materials, such as electronic waste, characterization is performed to determine correct elemental composition, well detect harmful elements and substances.
In this review, quality by design (QbD) initiatives are described as applications for many types of processes, such in the pharmaceutical industry, biotechnology field, and analytical methods development. Design space (DS) experiments (DoE) provide useful results development simulation advanced processes traditional manufacturing relationships. The three topics, QbD, DS DoE best way to achieve strong efficient industrial production.
Internal standard behaviour when using a reaction cell and the consequences of promoting or not its were evaluated for boron determination in plants.
We propose to analyze the relation between cellular immune response of Chagas' disease patients after in vitro stimulation peripheral blood mononuclear cells (PBMC) with recombinant antigens cytoplasmatic repetitive antigen (CRA) or flagellar (FRA) T. cruzi and chronic clinical forms disease. Cells were stimulated using phytohemagglutinin, CRA, FRA, a soluble Epimastigota (Ag-Epi) for 24 hr, 72 6 days. The proliferation was evaluated days culture by quantification incorporated 3H-thymidine....
A refratariedade e a resistência ao choque térmico dos materiais estão intrinsecamente ligadas às fases que os compõem, de modo identificação destas através da técnica difração raios X é atualmente imprescindível para completa caracterização matérias-primas produtos cerâmicos. Em 1969, H. M. Rietveld desenvolveu um software refinamento por mínimos quadrados permite cristalográfica material mono ou multifásico. Apesar possuir mais trinta anos, ainda não utilizada maneira regular na análise...
In the present work, an inductively coupled plasma-tandem mass spectrometer (ICP-MS/MS) operating in single quadrupole and shift modes were evaluated for As determination mineral fertilizers agricultural gypsum with high contents of rare earth elements.For MS/MS mode, oxygen was gas introduced into octopole reaction system (ORS 3 ).Samples prepared by microwave-assisted digestion diluted nitric acid solution.The accuracy checked analysis a fertilizer certified reference material (NIST SRM...
A method for determination of arsenic in mineral fertilizers by continuous flow hydride generation atomic absorption spectrometry (CF-HG-AAS) was developed using diluted acid and digester block with perfluoroalkoxy (PFA) tubes to sample preparation.An additional preparation procedure microwave-assisted digestion evaluated compared the proposed procedure.A full factorial design applied investigate effect variables best conditions found were 7 mol L -1 HNO 3 + 30% (m/m) H 2 O as reagents, 4 h...
Internal standardization is an effective strategy to minimize non-spectral interferences during contaminant determination in mineral fertilizers by SVDV ICP OES.