A5045704741- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Advanced biosensing and bioanalysis techniques
- Advanced Chemical Sensor Technologies
- Dye analysis and toxicity
- Advanced Nanomaterials in Catalysis
- Conducting polymers and applications
- Analytical chemistry methods development
- Pharmacological Effects and Assays
- Enzyme-mediated dye degradation
- Analytical Chemistry and Chromatography
- Enzyme Catalysis and Immobilization
- Analytical Methods in Pharmaceuticals
- Biotin and Related Studies
- Tea Polyphenols and Effects
- Ionic liquids properties and applications
- Aquatic Ecosystems and Phytoplankton Dynamics
- Nanoparticles: synthesis and applications
- Water Quality Monitoring and Analysis
- Marine and coastal ecosystems
- Cancer and biochemical research
- Antibiotics Pharmacokinetics and Efficacy
- Medicinal Plants and Neuroprotection
- Chemistry and Chemical Engineering
Universidade Federal de Santa Catarina
2014-2024
Centro Hospitalar do Tâmega e Sousa
2022
Fundação de Amparo à Pesquisa e Inovação do Estado de Santa Catarina
2015
Universidade de Cuiabá
2001-2003
Universidade Federal de São Carlos
1997-2000
A ratiometric electrochemical sensor based on a carbon paste electrode modified with quinazoline-engineered ZnFe Prussian blue analogue (PBA-qnz) was developed for the determination of herbicide butralin. The PBA-qnz synthesized by mixing an excess aqueous solution zinc chloride precursor sodium pentacyanido(quinazoline)ferrate. characterized spectroscopic and techniques. stable signal at +0.15 V vs. Ag/AgCl, referring to reduction iron ions, used as internal reference sensor, which...
Abstract Gold nanoparticles stabilized in poly(allylamine hydrochloride) (AuNP‐PAH) were synthesized, characterized and applied the development of a new sensor for determination vanillin by square‐wave voltammetry. Under optimized conditions, calibration curve showed linear range 0.90 to 15.0 µmol L −1 , with limit detection 55 nmol . The demonstrated acceptable selectivity stability, as well good intra‐day inter‐day repeatability electrode‐to‐electrode (with relative standard deviations...
Butylated hydroxyanisole (BHA) is a synthetic phenolic antioxidant widely used in various food matrices to prevent oxidative rancidity. However, its presence has been associated with liver damage and carcinogenesis animals. Thus, an electrochemical sensor was built using composite of gold nanoparticles synthesized peach extract (Prunus persica (L.) Batsch) graphene. Peach served as reducing stabilizing agent for nanoparticles, dispersing graphene, film former immobilize the on surface glassy...
Novel and effective biosensors based on Ag or Au nanoparticles dispersed in ionic liquid (IL) 1-butyl-3-methylimidazolium hexafluorophosphate (BMI·PF6) laccase (Lac) from Aspergillus oryzae immobilized chitosan (Chi) chemically cross-linked with cyanuric chloride (CC) were constructed. This enzyme catalyzes the oxidation of luteolin to corresponding o-quinone, which is electrochemically reduced back at 0.35 V vs.Ag/AgCl. Square-wave voltammetry was used for electrochemical determination...
An electrochemical sensor based on carbon paste modified with polyethyleneimine was developed and employed for the determination of caffeic acid in aromatic herbs. The prepared by mixing polyethylenimine (1.5% v/v), graphite powder, mineral oil. polyethylenimine-based electrode showed an enhancement charge transfer at electrode–solution interface a higher current intensity reaction acid, comparison to unmodified electrode. calibration plot constructed 0.1 mol L−1 acetate buffer (pH 5.0)...
ENZYMATIC SOURCE.This article describes the current status of several analytical methodologies using vegetal tissue and crude extracts as enzymatic source.In this divulgation paper obtention extract and/or selected procedures are presented emphasizing its characteristics peculiarities.Examples many biosensors flow injection tissues or for determination analytes, such amines, ascorbic acid, ethanol, glutamate, hydrogen peroxide, oxalic pectins, phenolic compounds urea biologic, environmental,...