A5066235730- Analytical chemistry methods development
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Electrochemical sensors and biosensors
- Advanced ceramic materials synthesis
- Adsorption and biosorption for pollutant removal
- Radioactive element chemistry and processing
- Supercapacitor Materials and Fabrication
- Diamond and Carbon-based Materials Research
- Analytical Chemistry and Chromatography
- Mass Spectrometry Techniques and Applications
- Silicone and Siloxane Chemistry
- Analytical Methods in Pharmaceuticals
- Pesticide Residue Analysis and Safety
- Fiber-reinforced polymer composites
- Carbon Nanotubes in Composites
- Silicon Nanostructures and Photoluminescence
- Water Quality Monitoring and Analysis
- Recycling and utilization of industrial and municipal waste in materials production
- Lanthanide and Transition Metal Complexes
- Concrete and Cement Materials Research
- Chemical Synthesis and Characterization
- Biosensors and Analytical Detection
- Covalent Organic Framework Applications
- Molecular Sensors and Ion Detection
Universidade Estadual de Londrina
2016-2025
Instituto de Saúde
2019
Entomological Society of Brazil
2015-2018
Universidade Estadual de Campinas (UNICAMP)
2005-2014
Universidade Tecnológica Federal do Paraná
2011
Universidade Federal de Alfenas
2010-2011
Universidade Federal de Uberlândia
2010
Moringa oleifera seeds were investigated as a biosorbent for removing metal ions from aqueous effluents. The morphological characteristics well the chemical composition of M. evaluated using Fourier Transform Infrared (FT-IR) Spectroscopy, Thermogravimetric Analysis (TGA), X-Ray Diffraction (XRD) and Scanning Electron Microscopy (SEM). FT-IR spectra showed presence lipids protein components. electron micrographs that have an adequate profile retention ions. results suggest potential...
A new method for cadmium determination at ng L−1 levels is described. The based on the on-line coupling of a flow preconcentration system using multiwall carbon nanotubes (MWCNT) as sorbent with TS-FF-AAS determination. Cadmium was pH 4.9 onto an MWCNT minicolumn (30 mg) 2 min 5.0 mL min−1 rate. elution step performed by 0.5 mol HNO3 and desorbed directly pumped to TS-FF-AAS. All experimental parameters that play important roles in performance were evaluated optimized means fractional...
In the present study, a flow injection system using dual mini-columns, SiO2/Al2O3/TiO2 and silica gel functionalized with [3-(2-aminoethylamino)propyl] trimethoxysilane (SiO2/AAPTMS) for sequential preconcentration of Cr(III) Cr(VI), respectively, from water samples FAAS detection was proposed. A two-level full factorial design (24) desirability function were employed optimization variables related to performance. The limits 0.66 0.27 μg L−1 Cr(IV), obtained under optimized conditions (flow...
A new ion-selective cross-linked poly(vinylimidazole-co-ethylene glycol dimethacrylate) prepared via a double-imprinting process was developed for the recognition and preconcentration of Pb2+ from water samples. The sorbent characterized by FT-IR, SEM, TGA textural data. maximum dynamic sorption capacity 42.04 mg g−1 double-imprinted polymer. kinetics data were described pseudo-second-order model. polymer exhibited higher efficiency than blank (non-imprinted polymer). procedure involved...
Abstract In this work, a simple and low‐cost method was developed for the simultaneous determination of antioxidants tert‐butylhydroquinone (TBHQ) butylated hydroxyanisole (BHA) in presence cationic surfactant CPB by square wave voltammetry (SWV) technique using carbon black paste electrode (CBPE). The performance investigated varying parameters such as pH, electrolyte, type concentration surfactant. Under optimum conditions 0.2 mol L −1 phosphate buffer (pH 7.0), 600.0 μmol cetylpyridinium...
A novel poly(methacrylic acid) material (IIP/CTAB) was prepared by a hierarchical double-imprinting process with Ni2+ ion and cationic surfactant—cetyltrimethylammonium bromide (CTAB) as templates, it employed to adsorb ions from aqueous medium. Other materials— single-imprinted (IIP/no CTAB) nonimprinted (NIP/no were investigated in adsorption studies. All the synthesized polymers characterized FTIR, SEM, nitrogen adsorption–desorption isotherm. The maximum capacities of IIP/CTAB NIP/no...
Abstract In this paper, the evaluation of a boron‐doped ultrananocrystalline diamond (BD‐UNCD) electrode for determination ibuprofen (IBU) in pharmaceutical formulations using batch‐injection analysis with amperometric detection (BIA‐AD) is presented. The BD‐UNCD was characterized by Raman spectroscopy and electrochemical measurements were carried out before after anodic pretreatment. An improved response IBU oxidation observed as compared to commercial electrode. optimized method based on...
This study involves the preparation of an ion imprinted organic-inorganic polymer (IIP) for selective sorbent enrichment Ni2+ from aqueous solutions with further determination by GF AAS. The hybrid polymeric network was prepared a mixture 2-aminoethyl- 3-aminobutylmethyldimethoxysilane as functional monomer, and tetraethoxysilane crosslinking agent, containing cetyltrimethylammonium bromide templates. polymers were characterized IR, TG SEM. maximum adsorptive capacity IIP towards ions,...