A5082509383- Electrochemical Analysis and Applications
- Electrochemical sensors and biosensors
- Analytical chemistry methods development
- Analytical Chemistry and Sensors
- Forensic Toxicology and Drug Analysis
- Analytical Methods in Pharmaceuticals
- Spectroscopy and Chemometric Analyses
- Heavy Metals in Plants
- Mass Spectrometry Techniques and Applications
- Molecular Sensors and Ion Detection
Universidade Estadual de Londrina
2019-2023
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 simple, low-cost and sensitive electroanalytical method was developed for the simultaneous determination of p-nitrophenol o-nitrophenol isomers in water samples at a glassy carbon electrode (CGE) presence cationic surfactant. The electrochemical behavior studied by cyclic voltammetry (CV) 0.1 mol L−1 acetate/acetic acid buffer (pH 3.70) absence cetylpyridinium bromide. resolution overlapped cathodic peaks potentials (Epc) successfully improved 100.0 µmol bromide, thus making this approach...
Abstract A new voltammetric sensor based on molecularly imprinted poly(acrylic acid)‐MWCNT nanocomposite (MIP‐MWCNT) drop‐coated onto glassy carbon electrode (GCE) was developed and applied to tramadol (TR) determination in pharmaceutical samples. The prepared by suspension of MIP‐MWCNT at 1 : (w/w) ratio show an improved performance compared unmodified GCE. electrochemical method is preconcentration modified GCE surface −1.5 V vs Ag/AgCl for 180 s 0.1 Britton‐Robinson buffer (pH 8.0)...
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...