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Valfredo Azevedo Lemos

Valfredo Azevedo Lemos

D-Index & Metrics

Chemistry

D-Index
48
Citations
6605
World Ranking
15416
National Ranking
128

Overview

Valfredo Azevedo Lemos is affiliated with Southwest Bahia State University in Brazil. Their research primarily focuses on Chemistry, with a significant body of work in the subfields of Analytical Chemistry, Electrochemistry, Biomedical Engineering, Health, Toxicology and Mutagenesis, and Bioengineering.

Their scientific contributions cover a range of main topics, including:

  • Analytical chemistry methods development
  • Electrochemical Analysis and Applications
  • Mercury impact and mitigation studies
  • Analytical Chemistry and Sensors
  • Biosensors and Analytical Detection
  • Heavy metals in environment
  • Radioactive element chemistry and processing

Valfredo Azevedo Lemos has an established publication record in various scientific journals. Their recent papers include:

  • In-syringe dispersive liquid-liquid microextraction, 2021, Talanta
  • Deep eutectic solvents in liquid-phase microextraction: Contribution to green chemistry, 2021, TrAC Trends in Analytical Chemistry
  • Multivariate optimization of a dispersive liquid-liquid microextraction method for determination of copper and manganese in coconut water by FAAS, 2021, Food Chemistry
  • Automation of continuous flow analysis systems - a review, 2020, Microchemical Journal
  • A novel direct-immersion single-drop microextraction combined with digital colorimetry applied to the determination of vanadium in water, 2020, Talanta

The frequent coauthors who have collaborated with Valfredo Azevedo Lemos include:

  • Luana Bastos Santos
  • Jeferson Alves Barreto
  • Marcos Almeida Bezerra
  • Sérgio L.C. Ferreira
  • Cléber Galvão Novaes

Throughout their career, Valfredo Azevedo Lemos has published multiple articles in several prominent journals, including:

  • Microchemical Journal
  • TrAC Trends in Analytical Chemistry
  • Talanta
  • Food Chemistry
  • Water Air & Soil Pollution

Best Publications

  • Separation and preconcentration procedures for the determination of lead using spectrometric techniques: a review.

    Maria das Graças A. Korn;Jailson B. de Andrade;Djane S. de Jesus;Djane S. de Jesus;Valfredo A. Lemos

  • New Materials for Solid‐Phase Extraction of Trace Elements

    Valfredo Azevedo Lemos;Leonardo Sena Gomes Teixeira;Marcos de Almeida Bezerra;Antonio Celso Spínola Costa

  • Amberlite XAD-2 functionalized with 2-aminothiophenol as a new sorbent for on-line preconcentration of cadmium and copper.

    Valfredo Azevedo Lemos;Patrícia Xavier Baliza

  • Uranium determination using atomic spectrometric techniques: An overview

    Juracir S. Santos;Leonardo S.G. Teixeira;Walter N.L. dos Santos;Valfredo A. Lemos;Valfredo A. Lemos

  • Application of polyurethane foam as a sorbent for trace metal pre-concentration — A review

    V.A. Lemos;M.S. Santos;E.S. Santos;M.J.S. Santos

  • Multi-element determination of Cu, Fe, Ni and Zn content in vegetable oils samples by high-resolution continuum source atomic absorption spectrometry and microemulsion sample preparation.

    Luana S. Nunes;José T.P. Barbosa;Andréa P. Fernandes;Valfredo A. Lemos;Valfredo A. Lemos

  • Cloud point extraction for Co and Ni determination in water samples by flame atomic absorption spectrometry

    Valfredo Azevedo Lemos;Robson Silva da França;Bruno Oliveira Moreira

  • Preconcentration system for cadmium and lead determination in environmental samples using polyurethane foam/Me-BTANC

    Ednilton Moreira Gama;Adriana da Silva Lima;Valfredo Azevedo Lemos

  • Multivariate optimization techniques in analytical chemistry - an overview

    Sergio L.C. Ferreira;Valfredo A. Lemos;Vanessa S. de Carvalho;Erik G.P. da Silva

  • Deep eutectic solvents in liquid-phase microextraction: contribution to green chemistry

    Luana Bastos Santos;Luana Bastos Santos;Rosivan dos Santos de Assis;Rosivan dos Santos de Assis;Jeferson Alves Barreto;Marcos Almeida Bezerra;Marcos Almeida Bezerra

  • Review of procedures involving separation and preconcentration for the determination of cadmium using spectrometric techniques.

    Sérgio L C Ferreira;Jailson B de Andrade;Maria das Graças A Korn;Madson de G Pereira

  • On-line preconcentration system for nickel determination in food samples by flame atomic absorption spectrometry

    Sergio Luis Costa Ferreira;Walter Nei Lopes dos Santos;Valfredo Azevedo Lemos;Valfredo Azevedo Lemos

  • An on-line continuous flow system for copper enrichment and determination by flame atomic absorption spectroscopy

    Sérgio L.C Ferreira;Valfredo A Lemos;Barbara C Moreira;A.C.Spinola Costa

  • Copper determination in natural water samples by using FAAS after preconcentration onto amberlite XAD-2 loaded with calmagite

    Sérgio L.C Ferreira;Janeide R Ferreira;Alailson F Dantas;Valfredo A Lemos

  • A procedure for determination of cobalt in water samples after dispersive liquid–liquid microextraction

    Patrícia Xavier Baliza;Patrícia Xavier Baliza;Leonardo Sena Gomes Teixeira;Valfredo Azevedo Lemos

  • An on-line system for preconcentration and determination of lead in wine samples by FAAS

    Valfredo Azevedo Lemos;Miguel de la Guardia;Sergio Luis Costa Ferreira

  • Analytical strategies of sample preparation for the determination of mercury in food matrices — A review

    Sergio L.C. Ferreira;Valfredo A. Lemos;Laiana O.B. Silva;Antonio F.S. Queiroz

  • On-line preconcentration system for lead determination in seafood samples by flame atomic absorption spectrometry using polyurethane foam loaded with 2-(2-benzothiazolylazo)-2-p-cresol

    Valfredo Azevedo Lemos;Valfredo Azevedo Lemos;Sergio Luis Costa Ferreira

  • Synthesis of amberlite XAD-2-PC resin for preconcentration and determination of trace elements in food samples by flame atomic absorption spectrometry

    Valfredo Azevedo Lemos;Douglas Gonçalves da Silva;Anaildes Lago de Carvalho;Débora de Andrade Santana

  • Thiazolylazo dyes and their application in analytical methods

    Valfredo Azevedo Lemos;Elenir Souza Santos;Moacy Selis Santos;Regina Terumi Yamaki

Frequent Co-Authors

Sergio Luis Costa Ferreira
Sergio Luis Costa Ferreira Federal University of Bahia
Marco Aurélio Zezzi Arruda
Marco Aurélio Zezzi Arruda State University of Campinas
Manuel Miró
Manuel Miró University of the Balearic Islands
Miguel de la Guardia
Miguel de la Guardia University of Valencia
Mustafa Soylak
Mustafa Soylak Erciyes University
Latif Elci
Latif Elci Pamukkale University
Adilson J. Curtius
Adilson J. Curtius Universidade Federal de Santa Catarina

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