Macroemulsion-based dispersive magnetic solid phase extraction for preconcentration and determination of copper(II) in gasoline

A new method referred to as microemulsion-based Dispersive Magnetic Solid-Phase Extraction (MDM-SPE) is presented for use in the extraction and preconcentration of metal ions from complex organic matrices. MDM-SPE combines the features of magnetic nanoparticles (MNPs) and microemulsions. It was succ...

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Veröffentlicht in:Mikrochimica acta (1966) 2018-02, Vol.185 (2), p.99-8, Article 99
Hauptverfasser: Cunha, Francisco Antônio S., Ferreira, Danilo Tadeu S., Andrade, Willy C. R., Fernandes, Julys Pablo A., Lyra, Wellington S., Pessoa, Amália G. G., de Araujo, Mario Cesar Ugulino
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container_end_page 8
container_issue 2
container_start_page 99
container_title Mikrochimica acta (1966)
container_volume 185
creator Cunha, Francisco Antônio S.
Ferreira, Danilo Tadeu S.
Andrade, Willy C. R.
Fernandes, Julys Pablo A.
Lyra, Wellington S.
Pessoa, Amália G. G.
de Araujo, Mario Cesar Ugulino
description A new method referred to as microemulsion-based Dispersive Magnetic Solid-Phase Extraction (MDM-SPE) is presented for use in the extraction and preconcentration of metal ions from complex organic matrices. MDM-SPE combines the features of magnetic nanoparticles (MNPs) and microemulsions. It was successfully applied to the extraction of copper(II) from gasoline prior to its determination by Graphite Furnace Atomic Absorption Spectrometry (GF-AAS). The material for use in MDM-SPE was obtained by first functionalizing MNPs of the type Fe 3 O 4 @Al 2 O 3 with sodium dodecyl sulfate and the chelator 1-(2-pyridylazo)-2-naphthol (PAN) dispersed in 1-propanol. The resulting functionalized magnetic MNPs were dispersed in a microemulsion prepared from gasoline, buffer, and 1-propanol. After waiting for 5 s (during which the formation of the copper complex on the MNPs is complete), the MNPs are magnetically separated. The complex was then eluted with 2 mol L −1 HNO 3 , and the eluate submitted to GF-AAS. Various parameters were optimized. Copper(II) can be quantified by this method over a linear range that extends from 2.0 to 10.0 μg·L −1 . Other figures of merit include (a) a 37 ng·L −1 detection limit, (b) a repeatability of 1.1%, (c) a reproducibility of 2.1%, and (d) an enrichment factor of nine. The high surface-to-volume ratio of the microemulsion containing the dispersed magnetic sorbent warrants an efficient contact for reaction between copper(II) and the complexing agent, and this results in fast (about 40 s) extraction and pre-concentration of copper(II). MDM-SPE is accurate, precise and efficient. Microemulsions do not break down, and phase separation, heating, laborious, and time-consuming sample preparation, and incorporation of impurities into the graphite furnace (which can generate inaccuracies in GF-AAS analysis) are not needed. Graphical abstract Schematic of a new method for Microemulsion-based Dispersive Magnetic Solid-Phase Extraction (MDMSPE) using functionalized magnetic nanoparticles (FMNPs). It was applied to the preconcentration of copper(II) in gasoline.
doi_str_mv 10.1007/s00604-017-2634-0
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The material for use in MDM-SPE was obtained by first functionalizing MNPs of the type Fe 3 O 4 @Al 2 O 3 with sodium dodecyl sulfate and the chelator 1-(2-pyridylazo)-2-naphthol (PAN) dispersed in 1-propanol. The resulting functionalized magnetic MNPs were dispersed in a microemulsion prepared from gasoline, buffer, and 1-propanol. After waiting for 5 s (during which the formation of the copper complex on the MNPs is complete), the MNPs are magnetically separated. The complex was then eluted with 2 mol L −1 HNO 3 , and the eluate submitted to GF-AAS. Various parameters were optimized. Copper(II) can be quantified by this method over a linear range that extends from 2.0 to 10.0 μg·L −1 . Other figures of merit include (a) a 37 ng·L −1 detection limit, (b) a repeatability of 1.1%, (c) a reproducibility of 2.1%, and (d) an enrichment factor of nine. 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R.</au><au>Fernandes, Julys Pablo A.</au><au>Lyra, Wellington S.</au><au>Pessoa, Amália G. G.</au><au>de Araujo, Mario Cesar Ugulino</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Macroemulsion-based dispersive magnetic solid phase extraction for preconcentration and determination of copper(II) in gasoline</atitle><jtitle>Mikrochimica acta (1966)</jtitle><stitle>Microchim Acta</stitle><addtitle>Mikrochim Acta</addtitle><date>2018-02-01</date><risdate>2018</risdate><volume>185</volume><issue>2</issue><spage>99</spage><epage>8</epage><pages>99-8</pages><artnum>99</artnum><issn>0026-3672</issn><eissn>1436-5073</eissn><abstract>A new method referred to as microemulsion-based Dispersive Magnetic Solid-Phase Extraction (MDM-SPE) is presented for use in the extraction and preconcentration of metal ions from complex organic matrices. MDM-SPE combines the features of magnetic nanoparticles (MNPs) and microemulsions. It was successfully applied to the extraction of copper(II) from gasoline prior to its determination by Graphite Furnace Atomic Absorption Spectrometry (GF-AAS). The material for use in MDM-SPE was obtained by first functionalizing MNPs of the type Fe 3 O 4 @Al 2 O 3 with sodium dodecyl sulfate and the chelator 1-(2-pyridylazo)-2-naphthol (PAN) dispersed in 1-propanol. The resulting functionalized magnetic MNPs were dispersed in a microemulsion prepared from gasoline, buffer, and 1-propanol. After waiting for 5 s (during which the formation of the copper complex on the MNPs is complete), the MNPs are magnetically separated. The complex was then eluted with 2 mol L −1 HNO 3 , and the eluate submitted to GF-AAS. Various parameters were optimized. Copper(II) can be quantified by this method over a linear range that extends from 2.0 to 10.0 μg·L −1 . Other figures of merit include (a) a 37 ng·L −1 detection limit, (b) a repeatability of 1.1%, (c) a reproducibility of 2.1%, and (d) an enrichment factor of nine. The high surface-to-volume ratio of the microemulsion containing the dispersed magnetic sorbent warrants an efficient contact for reaction between copper(II) and the complexing agent, and this results in fast (about 40 s) extraction and pre-concentration of copper(II). MDM-SPE is accurate, precise and efficient. Microemulsions do not break down, and phase separation, heating, laborious, and time-consuming sample preparation, and incorporation of impurities into the graphite furnace (which can generate inaccuracies in GF-AAS analysis) are not needed. Graphical abstract Schematic of a new method for Microemulsion-based Dispersive Magnetic Solid-Phase Extraction (MDMSPE) using functionalized magnetic nanoparticles (FMNPs). It was applied to the preconcentration of copper(II) in gasoline.</abstract><cop>Vienna</cop><pub>Springer Vienna</pub><pmid>29594660</pmid><doi>10.1007/s00604-017-2634-0</doi><tpages>8</tpages></addata></record>
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subjects Aluminum oxide
Anabolic steroids
Analysis
Analytical Chemistry
Atomic absorption analysis
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Coordination compounds
Copper
Copper compounds
Dispersion
Gasoline
Graphite
Iron oxides
Microemulsions
Microengineering
Nanochemistry
Nanotechnology
Naphthol
Original Paper
Phase separation
Pyridylazonaphthol
Reproducibility
Sodium dodecyl sulfate
title Macroemulsion-based dispersive magnetic solid phase extraction for preconcentration and determination of copper(II) in gasoline
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