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Cloud point extraction (CPE) and dispersive liquid-liquid microextraction (DLLME) applied in the development of analytical methods for metals preconcentration and spectrometric determination

Abstract

Separation and preconcentration are often required to eliminate interferences, increased sensitivity and improved detection limits of spectrophotometric and spectrometric techniques. Such processes include liquid-liquid extraction, cloud point extraction, solid phase extraction, co-precipitation and precipitation. The first has many applications in the determination of analytes at low concentrations and in complex matrices, in a number of samples such as environmental and biological samples. The main disadvantage of liquid-liquid extraction is the high consumption of toxic reagents, which can be hazardous to the environment. A proposal for the replacement of toxic solvents used in conventional liquid-liquid extraction, are surfactants, which enable the development of environmentally friendly methods of analysis, decreasing the amount of toxic waste discarded in the environment. This process is called cloud point extraction (CPE). The dispersive liquid-liquid microextraction (DLLME) also added to the advantages of liquid-liquid extraction with significant reduction in the consumption of solvents. This aim of this project is to use the CPE and DLLME processes in the development of analytical methods for the determination of ions such as cadmium, nickel, cobalt, copper and zinc and subsequent detection using the techniques of atomic absorption spectrometry - flame and or graphite furnace. Three complexing reagents will be used: 1 - (2-pyridylazo)-2-naphthol (PAN), di-2-pyridyl ketone saliciloilhidrazona (DPKSH) and di-2-pyridyl ketone benzoilhidrazona (DPKBH). (AU)

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Scientific publications (10)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
AKIBA, NAOMI; MANCINI, RODRIGO S. N.; CARVALHO, ALEXANDRE ZATKOVSKIS; GAUBEUR, IVANISE. Determination of Cadmium in Water Samples by Automated Flow-Batch Cloud Point Extraction (CPE) Hyphenated to High-Resolution Continuum Source Flame Atomic Spectrometry (HR-CS FAAS). Analytical Letters, AUG 2021. Web of Science Citations: 0.
DA SILVA, ANTONIO FRANCISCO; PAPAI, RODRIGO; LUZ, MACIEL SANTOS; GAUBEUR, IVANISE. Analytical extraction procedure combined with atomic and mass spectrometry for the determination of tin in edible oil samples, and the potential application to other chemical elements. Journal of Food Composition and Analysis, v. 96, MAR 2021. Web of Science Citations: 0.
LIMA, LUCAS C.; PAIXAO, THIAGO R. L. C.; NOMURA, CASSIANA S.; GAUBEUR, IVANISE. Combination of Dispersive Liquid Liquid Microextraction and Emulsion Breaking for the Determination of Cu(II) and Pb(II) in Biodiesel and Oil Samples. ENERGY & FUELS, v. 31, n. 9, p. 9491-9497, SEP 2017. Web of Science Citations: 3.
PORTO, DANIELE S.; AKIBA, NAOMI; DE OLIVEIRA, MARCONE AUGUSTO L.; GAUBEUR, IVANISE. Speciation of Chromium in Water Samples after Dispersive Liquid-Liquid Microextraction, and Detection by Means of High-Resolution Continuum Source Atomic Absorption Spectrometry. Journal of the Brazilian Chemical Society, v. 28, n. 2, p. 266+, FEB 2017. Web of Science Citations: 9.
DANIELE S. PORTO; NAOMI AKIBA; MARCONE AUGUSTO L. DE OLIVEIRA; IVANISE GAUBEUR. Speciation of Chromium in Water Samples after Dispersive Liquid-Liquid Microextraction, and Detection by Means of High-Resolution Continuum Source Atomic Absorption Spectrometry. Journal of the Brazilian Chemical Society, v. 28, n. 2, p. 266-276, Fev. 2017.
GAUBEUR, I.; AGUIRRE, M. A.; KOVACHEV, N.; HIDALGO, M.; CANALS, A. Dispersive liquid-liquid microextraction combined with laser-induced breakdown spectrometry and inductively coupled plasma optical emission spectrometry to elemental analysis. Microchemical Journal, v. 121, p. 219-226, JUL 2015. Web of Science Citations: 19.
GARCIA, SAMARA; GERONDI, FABIANA; PAIXAO, THIAGO R. L. C.; ARRUDA, MARCO A. Z.; GAUBEUR, IVANISE. Cadmium and Lead Determination in Freshwater and Hemodialysis Solutions by Thermospray Flame Furnace Atomic Absorption Spectrometry Following Cloud Point Extraction. Journal of the Brazilian Chemical Society, v. 26, n. 3, p. 490-497, MAR 2015. Web of Science Citations: 5.
GAUBEUR, IVANISE; ANGEL AGUIRRE, MIGUEL; KOVACHEV, NIKOLAY; HIDALGO, MONTSERRAT; CANALS, ANTONIO. Speciation of chromium by dispersive liquid-liquid microextraction followed by laser-induced breakdown spectrometry detection (DLLME-LIBS). Journal of Analytical Atomic Spectrometry, v. 30, n. 12, p. 2541-2547, 2015. Web of Science Citations: 25.
GALBEIRO, RAFAELA; GARCIA, SAMARA; GAUBEUR, IVANISE. A green and efficient procedure for the preconcentration and determination of cadmium, nickel and zinc from freshwater, hemodialysis solutions and tuna fish samples by cloud point extraction and flame atomic absorption spectrometry. JOURNAL OF TRACE ELEMENTS IN MEDICINE AND BIOLOGY, v. 28, n. 2, SI, p. 160-165, 2014. Web of Science Citations: 54.
GARCIA, SAMARA; GALBEIRO, RAFAELA; SILVA, SIDNEI G.; NOMURA, CASSIANA S.; ROCHA, FABIO R. P.; GAUBEUR, IVANISE. An environmentally friendly analytical procedure for nickel determination by atomic and molecular spectrometry after cloud point extraction in different samples. ANALYTICAL METHODS, v. 4, n. 8, p. 2429-2434, 2012. Web of Science Citations: 15.

Please report errors in scientific publications list by writing to: cdi@fapesp.br.