A5087890621- Electrochemical sensors and biosensors
- Electrochemical Analysis and Applications
- Analytical Chemistry and Sensors
- Dye analysis and toxicity
- melanin and skin pigmentation
- Advanced Photocatalysis Techniques
- Skin Protection and Aging
- CO2 Reduction Techniques and Catalysts
- Analytical Methods in Pharmaceuticals
- Gas Sensing Nanomaterials and Sensors
- Retinoids in leukemia and cellular processes
- Conducting polymers and applications
- Advanced biosensing and bioanalysis techniques
- Biochemical Analysis and Sensing Techniques
- Copper-based nanomaterials and applications
- Covalent Organic Framework Applications
- Contact Dermatitis and Allergies
Universidade Estadual Paulista (Unesp)
2014-2020
Centro Universitário de Araraquara
2014-2015
Universidade Estadual de Londrina
2013-2014
In the present study, an electroanalytical method for simultaneous determination of acetaminophen (AC) and uric acid (UA) in urine samples with a carbon nanotube paste electrode (CNTPE) employing cationic surfactant (cetylpyridinium bromide, CPB) was developed. The optimization proposed differential pulse voltammetric performed by means multi-response assays, highly recommended analysis. Under optimized conditions (pH 7.7, phosphate concentration 0.1 mol L−1, amplitude 123 mV, modulation...
The present paper describes a novel, simple and reliable differential pulse voltammetric method for determining amitriptyline (AMT) in pharmaceutical formulations. It has been described many authors that this antidepressant is electrochemically inactive at carbon electrodes. However, the procedure proposed herein consisted oxidizing AMT an unmodified nanotube paste electrode presence of 0.1 mol L(-1) sulfuric acid used as electrolyte. At such concentration, facilitated electroxidation...
TiO2 nanotube electrodes were self-doped by electrochemical cathodic polarization, potentially converting Ti4+ into Ti3+, and thereby increasing both the normalized conductance capacitance of electrodes. One-hundred (from 19.2 ± 0.1 μF cm−2 to 1.9 mF for SD-TNT) two-fold ∼6.2 ∼14.4 mS cm–2) concomitant increases in conductance, respectively, achieved nanotubes; this was compared with results their undoped counterparts. The indicate that Ti3+ states enhance density electronic states; is...
The present work describes the development of a voltammetric sensor for selective determination Acid Green 25 (AG25) hair dye, widely used in commercial temporary dyes. method is based on glassy carbon electrode modified with multiwalled nanotubes activated presence sulfuric acid, where anthraquinone group as chromophore dye molecule reduced at −0.44 V vs. Ag/AgCl reversible process involving two electrons Britton-Robinson (B-R) buffer solution pH 4.0. Analytical curves were obtained using...
This paper reports the development of a glassy carbon electrode modified with reduced graphene oxide (r-GO/GCE) for determination food dye named Ponceau 4R (PNC).The sensor presented excellent signal gain in relation to GCE and besides exhibiting well defined oxidation peaks PNC at potential 0.61 V. Through application square wave voltammetry using medium 0.1 mol L -1 Britton-Robinson (BR) buffer (pH 5.0), analytical curves were constructed under optimized conditions, where linear regions...
This paper describes a rapid and sensitive method for determination of the hair dye Basic Blue 41 in wastewater samples using screen-printed carbon electrodes modified with graphene (SPCE/Gr). The is based on reversible reduction azo groups at potential −0.23 V/−0.26 V, where both anodic cathodic currents increased 1,300 % when compared to (SPCE) glassy (GCE). optimization square wave voltammetric was performed by means 23 factorial design, Doehlert matrix multi-response assays, best...
Abstract A molecularly imprinted polymer (MIP)‐based electrochemical sensor was developed for the monitoring of hydrochlorothiazide (HCT) in dialysate and hemodialysis wastewater. The MIP constructed by electropolymerization ortho‐phenylenediamine on multi‐walled carbon nanotube modified glassy electrode surface. experimental optimization carried out Plackett‐Burman design screening central composite design. Through square wave voltammetry (SWV) analysis, presented linear response range...
The Cover Feature illustrates the selective and direct analysis of diuretic in dialysis samples with a molecularly imprinted polymer-based electrochemical sensor. More information can be found Article by G. F. de Oliveira et al.