JBCS

5:43, Fri Nov 16

Open Access/APCs

vol. 29, No. 6, 2018, p. 1167-1365

 

A SiO2/Al2O3/SnO2 ternary oxide was used as chelating agent free-solid phase extractor (CAF-SPE) in online solid-phase preconcentration system coupled to flame atomic absorption spectrometry (FAAS) for Pb2+ determination in different kind of water, chocolate powder and Ginkgo biloba samples. Based on the results, the material can be considered an efficient alternative as a silica-based adsorbent to be utilized for preconcentration and determination of Pb2+ at trace levels. Details are presented in the Article Synthesis of Chelating Agent Free-Solid Phase Extractor (CAF-SPE) Based on New SiO2/Al2O3/SnO2 Ternary Oxide and Application for Online Preconcentration of Pb2+ Coupled with FAAS by César R. T. Tarley, Guilherme L. Scheel, Emerson S. Ribeiro, Caroline D. Zappielo and Fabio A. C. Suquila on page 1225.


Cover Article
J. Braz. Chem. Soc. 2018, 29(6), 1225-1236

Synthesis of Chelating Agent Free-Solid Phase Extractor (CAF-SPE) Based on New SiO2/Al2O3/SnO2 Ternary Oxide and Application for Online Preconcentration of Pb2+ Coupled with FAAS

César R. T. Tarley; Guilherme L. Scheel; Emerson S. Ribeiro; Caroline D. Zappielo; Fabio A. C. Suquila

How to cite this article

A SiO2/Al2O3/SnO2 ternary oxide was used as chelating agent free-solid phase extractor (CAF-SPE) in online solid-phase preconcentration system coupled to flame atomic absorption spectrometry (FAAS) for Pb2+ determination in different kind of water, chocolate powder and Ginkgo biloba samples. Based on the results, the material can be considered an efficient alternative as a silica-based adsorbent to be utilized for preconcentration and determination of Pb2+ at trace levels. Details are presented in the Article Synthesis of Chelating Agent Free-Solid Phase Extractor (CAF-SPE) Based on New SiO2/Al2O3/SnO2 Ternary Oxide and Application for Online Preconcentration of Pb2+ Coupled with FAAS by César R. T. Tarley, Guilherme L. Scheel, Emerson S. Ribeiro, Caroline D. Zappielo and Fabio A. C. Suquila on page 1225.

http://dx.doi.org/10.21577/0103-5053.20170218

Published online: December 5, 2017

Communication J. Braz. Chem. Soc. 2018, 29(6), 1167-1174

Ultrasound-Promoted Chemoselective Oxysulfonylation of Alkenes

Queila P. S. B. Freitas; Raffael A. G. Lira; Jucleiton J. R. Freitas; Gilson Zeni; Paulo H. Menezes

How to cite this article

 

The ultrasound-assisted oxysulfonylation of alkenes using sodium salts of organosulfinic acids under air atmosphere in a chemo- and regioselective way is described. The β-keto-sulfones were obtained in good yields as major products.

http://dx.doi.org/10.21577/0103-5053.20180076

Published online: April 10, 2018


Articles J. Braz. Chem. Soc. 2018, 29(6), 1175-1182

Rhodium(III)-Catalyzed Addition of Indoles with Boc-Imines via C−H Bond Activation

Jinfang Wang; Hui Wang; Chuanjun Yue

How to cite this article

 

A rhodium-catalyzed alkylation reaction of indoles with N-Boc-imines has been developed via C−H activation to afford a series of biological important 2-indolylmethanamine derivatives with good functional group tolerance and high yields.

http://dx.doi.org/10.21577/0103-5053.20170212

Published online: November 27, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1183-1188

Impact of Cafeteria Diet on the Composition of Fatty Acids in Zebrafish (Danio rerio) Fillets

Vanessa B. M. J. C. Néia; Eliane P. Ambrosio-Albuquerque; Ingrid L. Figueiredo; Joana S. Boeing; Thibério C. da Silva; Vanessa Lewandowski; Ricardo P. Ribeiro; Jeane E. L. Visentainer; Jesuí V. Visentainer

How to cite this article

 

The effect of a cafeteria diet (chocolate, peanut and biscuit) on the composition of fatty acids in zebrafish fillets was evaluated by gas chromatography.

http://dx.doi.org/10.21577/0103-5053.20170213

Published online: November 27, 2017

J. Braz. Chem. Soc. 2018, 29(6), 1189-1198

Use of Mixture Design with Minimal Restrictions to Optimize an Extraction Procedure Employing Diluted Acids Assisted by Ultrasound and Microwave for Nutrient Element Determination in Vegetal Samples

Vinícius C. Costa; Erik G. P. Silva; Daniel C. Lima; Marcelo Franco; Raildo M. Jesus; Marcos A. Bezerra; Fábio A. C. Amorim

How to cite this article

 

Optimization of sample preparation based on extraction with diluted acids assisted by ultrasound and microwave for nutrients elements determination.

http://dx.doi.org/10.21577/0103-5053.20170214

Published online: November 27, 2017

J. Braz. Chem. Soc. 2018, 29(6), 1199-1209

Photophysical and Photochemical Properties and Aggregation Behavior of Phthalocyanine and Naphthalocyanine Derivatives

Thalita F. M. de Souza; Felipe C. T. Antonio; Mateus Zanotto; Paula Homem-de-Mello; Anderson O. Ribeiro

How to cite this article

 

Computational calculations (density-functional theory, DFT) of Q-band involved molecular orbitals in phthalocyanines and naphthalocyanines with similar structures.

http://dx.doi.org/10.21577/0103-5053.20170215

Published online: November 28, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1210-1217

Syntheses, Experimental and Theoretical Studies on Absorption/Emission Properties of Pyrazoline-Containing Aryl/Methoxynaphthyl Substituents

Jorge Trilleras; Edwin González-López; Jhair León-Jaramillo; Alfredo Pérez‑Gamboa; Esneyder Puello-Polo; Pablo Romo; Alejandro Ortíz; Jairo Quiroga

How to cite this article

 

Facile synthesis of pyrazoline derivatives and their luminescence properties. Theoretical calculations at time-dependent density functional theory (TD-DFT) level explain the electronic behavior.

http://dx.doi.org/10.21577/0103-5053.20170216

Published online: December 4, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1218-1224

Continuous Synthesis of a Green Fuel Additive Mixture with Highest Quantities of Solketalacetin and Solketal and Lowest Amount of Diacetin from Biodiesel-Derived Glycerol

Yadollah M. Gorji; Hassan S. Ghaziaskar

How to cite this article

 

Glycerol was reacted first with acetic acid to synthesize monoacetin. Then monoacetin and residual glycerol were reacted with acetone to obtain 62% solketalacetin, 30% solketal, and 8% diacetin.

http://dx.doi.org/10.21577/0103-5053.20170217

Published online: December 5, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1225-1236

Synthesis of Chelating Agent Free-Solid Phase Extractor (CAF-SPE) Based on New SiO2/Al2O3/SnO2 Ternary Oxide and Application for Online Preconcentration of Pb2+ Coupled with FAAS

César R. T. Tarley; Guilherme L. Scheel; Emerson S. Ribeiro; Caroline D. Zappielo; Fabio A. C. Suquila

How to cite this article

 

Chelating agent free-solid phase extractor (CAF-SPE) based on new SiO2/Al2O3/SnO2 for online Pb2+ preconcentration.

http://dx.doi.org/10.21577/0103-5053.20170218

Published online: December 5, 2017

J. Braz. Chem. Soc. 2018, 29(6), 1237-1244

Enhanced Detection of Ponceau 4R Food Dye by Glassy Carbon Electrode Modified with Reduced Graphene Oxide

Paloma B. de Moraes; Felipe F. Hudari; João P. Silva; Maria V. B. Zanoni

How to cite this article

 

A voltammetric method is proposed by a simple electrodeposition of reduced graphene oxide on glassy carbon electrode. The modified electrode showed a 20-fold increase in analyte signal compared to unmodified electrode.

http://dx.doi.org/10.21577/0103-5053.20170219

Published online: December 5, 2017

J. Braz. Chem. Soc. 2018, 29(6), 1245-1255

Influence of Environmental Factors and Cultural Methods on the Content of N,N-Dimethyltryptamine in Psychotria viridis (Rubiaceae)

André D. Cavalcante; Gabriele A. Cardoso; Fernando L. P. de Oliveira; Eduardo Bearzoti; Adriana A. Okuma; Lucienir P. Duarte; Sidney A. Vieira-Filho

How to cite this article

 

Environmental parameters, nutrients, plant characteristics, data on farming methods were correlated with N,N-dimethyltryptamine, determined by gas chromatography coupled to mass spectrometry (GC-MS).

http://dx.doi.org/10.21577/0103-5053.20170221

Published online: December 6, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1256-1267

Structure/Activity of PtII/N,N-Disubstituted-N'-acylthiourea Complexes: Anti‑Tumor and Anti-Mycobacterium tuberculosis Activities

Ana M. Plutín; Anislay Alvarez; Raúl Mocelo; Raúl Ramos; Osmar C. Sánchez; Eduardo E. Castellano; Monize M. da Silva; Wilmer Villarreal; Legna Colina-Vegas; Fernando R. Pavan; Alzir A. Batista

How to cite this article

 

Twelve [Pt(PPh3)2(acylthiourea)]PF6 complexes was synthesized and evaluated against Mycobacterium tuberculosis and human tumor cells.

http://dx.doi.org/10.21577/0103-5053.20170222

Published online: December 6, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1268-1277

In vitro Evaluation of Oxidative Stress Caused by Fine Particles (PM2.5) Exhausted from Heavy-Duty Vehicles Using Diesel/Biodiesel Blends under Real World Conditions

Robson M. de Jesus; Aline C. Mosca; Aline L. N. Guarieiro; Gisele O. da Rocha; Jailson B. de Andrade

How to cite this article

 

Oxidative potential of PM2.5 as predictive indicator of adverse health effects.

http://dx.doi.org/10.21577/0103-5053.20170223

Published online: December 6, 2017

J. Braz. Chem. Soc. 2018, 29(6), 1278-1285

A Practical Fluorescence-Based Screening Protocol for Polyethylene Terephthalate Degrading Microorganisms

Michel R. B. Chaves; Maria L. S. O. Lima; Lusiane Malafatti‑Picca; Derlene A. de Angelis; Aline M. de Castro; Érika Valoni; Anita J. Marsaioli

How to cite this article

 

We proposed a fast, low-cost, microscale fluorescence-based screening methodology for PET degrading microorganisms with selective detection of the terephthalic acid monomer produced during the microbial hydrolysis.

http://dx.doi.org/10.21577/0103-5053.20170224

Published online: December 6, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1286-1290

Kavalactones and Benzoic Acid Derivatives from Leaves of Piper fuligineum Kunth (Piperaceae)

Bruna F. Mazzeu; Lidiane G. Felippe; Fernando Cotinguiba; Massuo J. Kato; Maysa Furlan

How to cite this article

 

Kavalactones and benzoic acid derivatives from Piper fuligineum shows dichotomous biosynthetic pathways and shikimic acid is a common precursor of this two different classes.

http://dx.doi.org/10.21577/0103-5053.20170225

Published online: December 6, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1291-1303

Air Quality Indexes in the City of Rio de Janeiro During the 2016 Olympic and Paralympic Games

Felipe Tsuruta; Nicole J. de Carvalho; Cleyton M. da Silva; Graciela Arbilla

How to cite this article

 

The air quality indexes (AQIs) determined in Rio de Janeiro from July to September 2016, before and during the Summer Olympic and Paralympic Games, in four monitoring stations, were compiled and analyzed.

http://dx.doi.org/10.21577/0103-5053.20170226

Published online: December 11, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1304-1317

Synthesis and Antimicrobial Activity of Glycosylated 2-Aryl‑5‑amidinobenzimidazoles

Thiago B. de Souza; Josidel C. Oliver; Ana Paula B. Gomes; Cícero Flávio S. Aragão; Leandro S. Ferreira; Fernando Henrique A. Nogueira; Amanda Latércia T. Dias; Ricardo J. Alves

How to cite this article

 

Glycosylated 2-aryl-5-amidinobenzimidazoles were synthesized, characterized and showed antifungal and antibacterial potential against different strains.

http://dx.doi.org/10.21577/0103-5053.20170227

Published online: December 12, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1318-1327

Leaves from the Tree Poincianella pluviosa as a Renewable Source of Antiplasmodial Compounds against Chloroquine-Resistant Plasmodium falciparum

Jacqueline E. de Souza; Maria F. A. do Nascimento; Maria P. G. Borsodi; Ana P. de Almeida; Bartira Rossi-Bergmann; Alaíde B. de Oliveira; Sônia S. Costa

How to cite this article

 

Ten phenolic compounds were isolated from leaves of Poincianella pluviosa (Fabaceae). Among the major compounds, ellagic acid was the most active against Plasmodium falciparum (W2).

http://dx.doi.org/10.21577/0103-5053.20170228

Published online: December 12, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1328-1335

Identification of Ethyl and t-Butyl Glyceryl Ethers Using Gas Chromatography Coupled with Mass Spectrometry

Paula M. Veiga; Cláudia O. Veloso; Ayres G. Dias; Cristiane A. Henriques

How to cite this article

 

Gas chromatography-mass spectrometry (GC-MS) identification of ethyl and t-butyl glyceryl ethers.

http://dx.doi.org/10.21577/0103-5053.20170231

Published online: December 14, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1336-1343

Determination of Alkyl Esters Content by Gas Chromatography: Validation of Method Based on Short Column and Response Factor

Filipe L. Silva; Lucas N. Melo; Carlos R. Wolf; Simoni M. P. Meneghetti; Janaína H. Bortoluzzi

How to cite this article

 

Quantification of fatty acid methyl or ethyl esters obtained from soybean oil and comparison of analytical methodologies applied to biodiesel samples.

http://dx.doi.org/10.21577/0103-5053.20170232

Published online: December 14, 2017

J. Braz. Chem. Soc. 2018, 29(6), 1344-1348

Chain Elongation Influence in Copolymerization with Different Diesters of Norbornene 2,3-Dicarboxylic Acid Monomers via ROMP under Air Atmosphere

Sâmia D. Braga; Vanessa B. Vieira; Cristina V. Silva-Neta; Nouga C. Batista; Larissa R. Fonseca; Benedito S. Lima-Neto; Geraldo E. Luz Jr.; José Luiz S. Sá

How to cite this article

 

Copolymerization via ring-opening metathesis polymerization (ROMP) under air atmosphere of norbornene (NBE) and its ester-dicarboxylic derivate with Ru-catalyst.

http://dx.doi.org/10.21577/0103-5053.20170233

Published online: December 19, 2017

J. Braz. Chem. Soc. 2018, 29(6), 1349-1359

Multi-Residue Method for Determination of Thirty-Five Pesticides, Pharmaceuticals and Personal Care Products in Water Using Ionic Liquid-Dispersive Liquid‑Liquid Microextraction Combined with Liquid Chromatography‑Tandem Mass Spectrometry

Liziane C. Marube; Sergiane S. Caldas; Elisane O. dos Santos; Andressa Michaelsen; Ednei G. Primel

How to cite this article

 

Ionic liquid-dispersive liquid-liquid microextraction (IL-DLLME) was successfully used for the extraction of the pesticides and pharmaceuticals and personal care products (PPCPs) in water.

http://dx.doi.org/10.21577/0103-5053.20170234

Published online: December 19, 2017


J. Braz. Chem. Soc. 2018, 29(6), 1360-1365

Colorimetric Analysis of Cotton Textile Bleaching through H2O2 Activated by UV Light

Bruno P. de Oliveira; Lilian T. Moriyama; Vanderlei S. Bagnato

How to cite this article

 

Scheme of the proposed UV mediated cotton bleaching process with H2O2, evaluated by colorimetry and tensile test.

http://dx.doi.org/10.21577/0103-5053.20170235

Published online: December 19, 2017

Online version ISSN 1678-4790 Printed version ISSN 0103-5053
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