A5018152531- Analytical chemistry methods development
- Electrochemical Analysis and Applications
- Adsorption and biosorption for pollutant removal
- Analytical Chemistry and Sensors
- Heavy Metals in Plants
- Water Quality Monitoring and Analysis
- Chemical Synthesis and Characterization
- Forensic Toxicology and Drug Analysis
- Microfluidic and Capillary Electrophoresis Applications
- Electrochemical sensors and biosensors
- Mercury impact and mitigation studies
- Biodiesel Production and Applications
- Covalent Organic Framework Applications
- Arsenic contamination and mitigation
- Extraction and Separation Processes
- Insect Pest Control Strategies
- Spectroscopy and Chemometric Analyses
- Radioactive element chemistry and processing
- Pesticide Residue Analysis and Safety
- Thermal and Kinetic Analysis
- Mass Spectrometry Techniques and Applications
- Analytical Chemistry and Chromatography
- Forensic Fingerprint Detection Methods
- Heavy metals in environment
- Dye analysis and toxicity
Universidade Estadual de Londrina
2017-2023
National Pedagogic University
2022-2023
Instituto de Saúde
2019
Universidade Estadual de Campinas (UNICAMP)
2019
Entomological Society of Brazil
2017
This paper describes the development of an electrochemical sensor highly selective to Pb2 + ions based on drop-coated glassy carbon electrode (GCE) with a suspension ion imprinted polymer (IIP) loaded 1-(2-pyridylazo)-2-naphthol (PAN) (IIP-PAN) and multi-walled nanotubes (MWCNT). The has been characterized by SEM TGA. method is open-circuit preconcentration onto modified in 0.05 mol L− 1 Tris-HCl buffer solution at pH 6.0 during 20 min. reduction was than performed closed circuit − 1.2 V 60...
A new on-line solid phase preconcentration method using an ion-imprinted polymer with restrict access material based on copper-imprinted poly(allylthiourea) modified 2-hydroxyethyl methacrylate and bovine serum (IIP-HEMA-BSA) to preconcentrate Cu2+ ions exclude protein from milk samples via FIA-FAAS was developed. The were preconcentrated at pH 4.5 through a mini-column packed 50.0 mg of IIP-HEMA-BSA flow rate 7.6 mL min-1 followed by counter-current elution 1.00 mol L-1 HCl towards the FAAS...
A new analytical method exploiting supramolecular solvent-based microextraction (SUPRAS) combined with ultrasound-assisted extraction to preconcentrate cadmium from medicinal plant, further determination by thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS), is proposed. The proposed based on the Ginkgo biloba L. leaf samples diluted acid (0.10 mol L−1 HNO3), followed metal complexation diethyl dithiophosphate and preconcentration using a solvent composed of inverted...
The development of a novel molecularly imprinted solid-phase extraction (MISPE) method for simultaneous preconcentration imazapyr (IMP), imazapic (IMZ) and imazethapyr (IMT) with determination by HPLC-PAD (High performance liquid chromatography - photodiode-array detector) is proposed. polymer synthesis was performed using as template molecule 1-vinylimidazole functional monomer. based on 100.0 mL sample through 200.0 mg poly(vinylimidazole-TRIM) (MIP-1VN) at pH 4.0, followed elution 2.0...
An adsorbent nanocomposite based on multi-walled carbon nanotubes and polyvinylpyridine is used in the development of a micro-flow injection preconcentration method coupled to TS-FF-AAS for determination very low levels Cd.
For years, researchers have focused on the determination of metal ions at trace levels in environmental and food samples using analytical methods that employ techniques with low cost acquisition maintenance without microwave-assisted acid digestion procedures or aggressive reagents. Therefore, present study deals synthesis application a novel, restricted-access poly(protoporphyrin-co-vinyl pyridine) adsorbent to preconcentrate copper water bovine milk only been subjected pH adjusting (pH...
Ion-imprinted polymers (IIPs) have been widely used in different fields of Analytical Sciences due to their intrinsic selective properties. However, the success chemical imprinting terms selectivity, as well stability, specific surface area, and absence swelling effect depends on fully understanding preparation process. Therefore, proposal this review is describe influence relevant parameters production processes ion-imprinted polymers, including nature (organic, inorganic, or hybrid...
A flow-injection preconcentration system using detection by the thermospray flame furnace atomic absorption spectrometry (FIA-TS-FF-AAS) is proposed.Cd 2+ are adsorbed on avocado seed activated carbon (ASAC) packed into a cylindrical mini-column and eluted HCl solutions for system.A 2 5 -1 fractional factorial Doehlert matrix design were employed to determine optimum conditions cadmium (pH 7.68, buffer concentration (Tris/Tris-HCl) of 0.023 mol L , eluent (HCl) 2.0 adsorbent mass 100.0 mg...
Biodiesel is a renewable fuel derived from oilseeds or animal fats. Biofuel has low oxidative stability due to the high content of esters unsaturated fatty acids, which are easily oxidized when exposed air, light, heat and metals. Antioxidants added biodiesel retard process, can capture free radicals making them thermodynamically more stable. This study aims analyze in presence metallic alloys carbon steel 1020 with rosemary extract. The extract had phenol 25,579 mgEAG/gdry mass, acting as...
A new online solid phase preconcentration method using the SiO 2 /Al O 3 /SnO ternary oxide (designated as SiAlSn) chelating agent free-solid extractor (CAF-SPE) coupled to flame atomic absorption spectrometry (FAAS) for Pb 2+ determination at trace levels in different kind of samples is proposed.The adsorbent has been characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron miscroscopy (SEM), energy dispersive X-ray (EDS), fluorescence (XRF) and textural data.The...
The performance of three conventional treatments, including microwave-assisted acid digestion (MWAD), ultrasoundassisted extraction (UAE) and dry method (DAM) for determination Cu2+ Zn2+ in flaxseed meal, was evaluated. Quantification performed by flame atomic absorption spectrometry (FAAS) differential pulse anode stripping voltammetry (DPASV). TheMWAD treatment with both concentrated HNO3 (CA) diluted (DA). concentration determined FAAS DPASV, different ranging from 14.4-26.0 μg g−1...