Search Results - "Santos, Wallans"

Simultaneous determination of caffeine, paracetamol, and ibuprofen in pharmaceutical formulations by high-performance liquid chromatography with UV detection and by capillary electrophoresis with conductivity detection by Cunha, Rafael R., Chaves, Sandro C., Ribeiro, Michelle M. A. C., Torres, Lívia M. F. C., Muñoz, Rodrigo A. A., Santos, Wallans T. P. Dos, Richter, Eduardo M.

“…Paracetamol, caffeine and ibuprofen are found in over‐the‐counter pharmaceutical formulations. In this work, we propose two new methods for simultaneous…”
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Dehydration of d-fructose to 5-hydroxymethyl-2-furfural in DMSO using a hydrophilic sulfonated silica catalyst in a process promoted by microwave irradiation by Barbosa, Sandro L., de S. Freitas, Milton, dos Santos, Wallans T. P., Nelson, David Lee, Klein, Stanlei I., Clososki, Giuliano Cesar, Caires, Franco J., Baroni, Adriano C. M., Wentz, Alexandre P.

“…SiO 2 -SO 3 H, with a surface area of 115 m 2 /g, pore volumes of 0.38 cm 3 g −1 and 1.32 mmol H + /g, was used as a 10% w/w catalyst for the preparation of…”
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A simple method to detect the stimulant modafinil in authentic saliva using a carbon-nanotube screen-printed electrode with adsorptive stripping voltammetry by dos Santos, Wallans T.P., Compton, Richard G.

“…•Analytically electrochemical oxidation signals from the stimulant drug modafinil are seen on carbon electrodes.•An electrochemical method using adsorptive…”
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Electrochemical detection of mephedrone using a graphene screen-printed electrode: a new sensitive and selective approach to identify synthetic cathinones in forensic analysis by Melo, Larissa M A, Arantes, Luciano C, Schaffel, Izabela F, Aranha, Lívia M S, Conceição, Nathália S, Lima, Camila D, Marinho, Pablo A, Ferreira, Rafael Q, Dos Santos, Wallans T P

“…Mephedrone (MEP) is an illicit stimulant drug that belongs to the synthetic cathinone (SC) class, which has been widely used for recreational purposes and…”
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Critical evaluation of voltammetric techniques for antioxidant capacity and activity: Presence of alumina on glassy-carbon electrodes alters the results by Lima, Ana P., dos Santos, Wallans T.P., Nossol, Edson, Richter, Eduardo M., Munoz, Rodrigo A.A.

“…Voltammetric techniques have been widely applied to determine the food antioxidant capacity/activity using different electrochemical parameters (peak current,…”
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Simple and Sensitive Determination of Sibutramine in Slimming Tea Beverages Using a Carbon Screen‐printed Electrode with Adsorptive Stripping Voltammetry by Lima, Amanda B., dos Santos, Wallans T. P., Compton, Richard G.

“…The stimulant sibutramine is an anorexic agent found as an adulterant in natural products and multivitamins supplements used for weight‐loss. In this work, a…”
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Electrochemical platform produced by 3D printing for analysis of small volumes using different electrode materials by Ramos, David L.O., de Faria, Lucas V., Alves, Diego A.C., Muñoz, Rodrigo A.A., dos Santos, Wallans T.P., Richter, Eduardo M.

“…Fused deposition modeling (FDM) 3D printing is a promising additive manufacturing technique to produce low-cost disposable electrochemical devices. However,…”
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Electrochemical detection of eutylone using screen-printed electrodes: Rapid and simple screening method for application in forensic samples by Arrieiro, Mariane O.B., Arantes, Luciano C., Moreira, Debora A.R., Pimentel, Dilton M., Lima, Camila D., Costa, Lívia M.F., Verly, Rodrigo M., dos Santos, Wallans T.P.

“…•Portable and fast electrochemical screening for forensic applications.•Sample preparation compatibility for a preliminary and definitive…”
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A nano-carbon electrode optimized for adsorptive stripping voltammetry: Application to detection of the stimulant selegiline in authentic saliva by dos Santos, Wallans T.P., Amin, Hatem M.A., Compton, Richard G.

“…•A multilayer nano-carbon modified electrode is prepared and optimized for adsorptive stripping voltammetry.•Multilayers of Carbon Black promote adsorptive…”
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Electrochemical detection of the synthetic cathinone 3,4-methylenedioxypyrovalerone using carbon screen-printed electrodes: A fast, simple and sensitive screening method for forensic samples by Lima, Camila D., Couto, Rosa A.S., Arantes, Luciano C., Marinho, Pablo A., Pimentel, Dilton M., Quinaz, M. Beatriz, da Silva, Rodrigo A.B., Richter, Eduardo M., Barbosa, Sandro L., dos Santos, Wallans T.P.

“…In this work, the electrochemical detection of 3,4-methylenedioxypyrovalerone (MDPV), a synthetic cathinone used as a stimulant drug, is presented for the…”
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Rapid and simple voltammetric screening method for Lysergic Acid Diethylamide (LSD) detection in seized samples using a boron-doped diamond electrode by Pimentel, Dilton M., Arantes, Luciano C., Santos, Luan M., Souza, Karla A.O., Verly, Rodrigo M., Barbosa, Sandro L., dos Santos, Wallans T.P.

“…•Voltammetric detection of LSD using boron-doped diamond electrode.•Interference study for twenty (20) phenethylamines derivatives as NBOMes and NBOHs.•Fast…”
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Altered electrochemistry of amiloride drug on boron-doped diamond electrode: Rapid and selective detection in urine by square-wave cathodic stripping voltammetry for application in doping control by Souza, Karla A.O., Nunes, Ana M.F., Pimentel, Dilton M., Verly, Rodrigo M., Gil, Eric S., Malagutti, Andréa R., dos Santos, Wallans T.P.

“…The amiloride (AMI) is a diuretic drug and has been illegally used in sports competitions. The development of simpler and faster analytical methods for AMI…”
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Development of a simple and rapid screening method for the detection of 1-(3-chlorophenyl)piperazine in forensic samples by Silva, Weberson P., Rocha, Raquel G., Arantes, Luciano C., Lima, Camila D., Melo, Larissa M.A., Munoz, Rodrigo A.A., dos Santos, Wallans T.P., Richter, Eduardo M.

“…1-(3-chlorophenyl) piperazine (mCPP) is a synthetic drug with hallucinogenic effects that has often been found in seized samples. In this context, easy to use…”
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Fast Screening and Determination of Tadalafil in Pharmaceutics by Batch Injection Analysis (BIA) with Amperometric Detection by Oliveira, Fabiano M., Ferreira, Priscila A., Neves, Camila G., Rosa, Tamires M., Santos, Wallans T. P., Melo, Edmar I., Silva, Rodrigo A. B.

“…Tadalafil (TDL) is the active ingredient of Cialis®, one of the top selling drugs for the treatment of erectile dysfunction and very counterfeit worldwide. In…”
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An innovative approach for selective and robust screening of NBOHs, NBOMes, and LSD in forensic samples using a 3D-Printed electrochemical double cell by Melo, Larissa M.A., de Faria, Lucas V., Arantes, Luciano C., Alves, Diego A.C., Rocha, Cláudia M., de Fátima, Ângelo, Munoz, Rodrigo A.A., Richter, Eduardo M., T. P. dos Santos, Wallans

“…Lysergic acid diethylamide (LSD) and two phenethylamine classes (NBOHs and NBOMes) are the main illicit drugs found in seized blotter papers. The preliminary…”
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Novel disposable and portable 3D-printed electrochemical apparatus for fast and selective screening of 25E-NBOH in forensic samples by de Faria, Lucas V., Macedo, Anne A., Arantes, Luciano C., Matias, Tiago A., Ramos, David L.O., Richter, Eduardo M., dos Santos, Wallans T.P., Muñoz, Rodrigo A.A.

“…The advent of new psychoactive substances (NPS) has caused enormous difficulty for legal control since they are rapidly commercialized, and their chemical…”
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Simple and rapid determination of clonidine in pharmaceutical samples by voltammetry using a bare glassy carbon electrode by Moreira, Débora A. R., Pimentel, Dilton M., Arrieiro, Mariane O. B., Barbosa, Sandro L., Silva, Rodrigo A. B., Santos, Wallans T. P.

“…This work presents, for the first time, the voltammetric behavior of clonidine (CLO) drug and its determination, using an unmodified glassy carbon electrode…”
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Use of a lab-made screen-printed sensor with chemically deposited boron-doped diamond for simple and selective electrochemical detection of the synthetic cathinone N-ethylpentylone in forensic samples by Melo, Larissa M.A., de Faria, Lucas V., Arantes, Luciano C., Vojs, Marian, Marton, Marian, Brocenschi, Ricardo F., Richter, Eduardo M., Munoz, Rodrigo A.A., dos Santos, Wallans T.P.

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Electrochemistry of the synthetic tryptamine 5-MeO-MiPT at glassy carbon and screen-printed electrodes: A rapid and simple screening method for application in forensic analysis by Melo, Larissa M.A., Arantes, Luciano C., Pimentel, Dilton M., Macedo, Anne A., Verly, Rodrigo M., Gil, Eric S., dos Santos, Wallans T.P.

“…5-Methoxy-N-methyl-N-isopropyltryptamine (5-MeO-MiPT), also known as moxy, is a synthetic tryptamine analogue used recreationally as a hallucinogenic drug…”
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Altered electrochemistry of oxcarbazepine on cathodically treated boron-doped diamond electrode: Selective detection by pulsed amperometric detection coupled to flow-injection analysis by Lima, Amanda B., de Oliveira, Fernando M., Guedes, Tiago de J., Sousa, Raquel M.F., Munoz, Rodrigo A.A., dos Santos, Wallans T.P.

“…This work presents a novel electrochemical method for the determination of oxcarbazepine (OXC) in urine and pharmaceutical samples using a flow injection…”
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