Multi-element determination of Cd, Pb, Cu, V, Cr, and Mn in ethanol fuel samples using energy dispersive X-ray fluorescence spectrometry after magnetic solid phase microextraction using CoFe2O4 nanoparticles

Meira, Lucília A.; Almeida, Jorge S.; Dias, Fábio de S.; Pedra, P.P.; Pereira, Amalia Luz Costa; Teixeira, Leonardo Sena Gomes

doi:10.1016/j.microc.2018.06.025

Cited by 34 publications

(11 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…TEM and XRD images of cobalt nanoferrite were presented in a previous work. 19 The analysis performed by XRD and TEM showed that nano-particle sizes were smaller than 20 nm, which could be considered as material on a nanometric scale.…”

Section: Resultsmentioning

confidence: 99%

“…The association between MSPME and EDXRF has been previously reported. 19,20 However, multielement determination in biodiesel samples, exploring the combination of the use of microextraction with magnetic nanoparticles (MNP) and EDXRF, is yet to be described. For application of MSPME in biodiesel samples, due to the high organic content of the matrix, it is necessary to use a system that facilitates the mobility and interaction between the analytes present in the sample and the MNP, for example, using the formation of an emulsified system.…”

Section: Introductionmentioning

confidence: 99%

“…To overcome this difficulty, different solid-phase extraction (SPE) procedures are proposed alongside EDXRF, including the possibility of multielement analysis by direct measurements on solid supports after a preconcentration procedure, avoiding an additional elution step with consequent sample dilution . − An elution step is usually necessary for analysis by ET AAS, ICP OES, or ICP-MS, when SPE is performed.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biodiesel Trace Element Analysis by Energy Dispersive X-ray Fluorescence Spectrometry Using Magnetic Solid-Phase Microextraction

et al. 2020

Self Cite

View full text Add to dashboard Cite

One parameter to examine biodiesel quality has to do with the existence of metals, given that their presence can negatively affect fuel stability, by virtue of the alteration to their physicochemical properties. Given the significance of monitoring the concentration of metals in biodiesel, this work is aimed at developing a different mode for multielement determination through the use of energy dispersive X-ray fluorescence (EDXRF) spectrometry. For this purpose, an extraction procedure using sample preparation by emulsification associated with magnetic solid-phase microextraction was proposed for separation of Cd, Pb, Cr, V, and Mo from biodiesel samples for posterior analysis using EDXRF spectrometry. The emulsion was prepared by mixing the sample with n-propyl alcohol and 0.01 mol L −1 nitric acid alongside subsequent contact with the solid phase (CoFe 2 O 4 nanoparticles impregnated with alizarin fluorine blue). Constrained mixing design was used to optimize the emulsion composition, and the recommended conditions were 36% (v v −1 ) n-propyl alcohol, 42% (v v −1 ) biodiesel, and 22% (v v −1 ) nitric acid solution for a total volume of 10 mL, using 100 mg of nanoparticles. The proposed extraction allowed enrichment factors of 9.3, 23, 27, 9.7, and 10 for Cd, Cr, V, Pb, and Mo, respectively. The limits of detection were found to be 13, 32, 17, 14, and 25 μg kg −1 for Cd, Pb, Cr, V, and Mo, respectively. Recovery tests were performed by adding 200 μg kg −1 of all analytes in question to six varying biodiesel samples with outcomes that registered between 85 and 114%. The recommended procedure was applied in the analysis of biodiesel, and the highest concentrations observed were 166 μg kg −1 for Cd, 106 μg kg −1 for Cr, 137 μg kg −1 for Pb, 82 μg kg −1 for V, and 92 μg kg −1 for Mo.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Biodiesel Trace Element Analysis by Energy Dispersive X-ray Fluorescence Spectrometry Using Magnetic Solid-Phase Microextraction

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…Metallic elements in gasoline are normally present in very low concentration, therefore, it is required the employment of sensitive techniques such as X-Ray Fluorescence (XRF) [4,5], Electrothermal Atomic Absorption Spectrometry (ETAAS) [1,6],…”

Section: Introductionmentioning

confidence: 99%

Reversed-phase dispersive liquid–liquid microextraction for elemental analysis of gasoline by inductively coupled plasma optical emission spectrometry

Vidal

Lorenzetti

Álvarez

et al. 2021

J. Anal. At. Spectrom.

View full text Add to dashboard Cite

show abstract

“…So, as different toxicity and exposure, the favorite and efficient procedure must be used for chromium speciation. Many efficient techniques such as inductively coupled plasma mass spectrometry [11], flame atomic absorption spectrometry (F-AAS) [12], inductively coupled plasma optical emission spectrometry (ICP-OES) [13], inductively coupled plasma-mass spectrometry (ICP-MS) [14], energy dispersive X-ray fluorescence spectrometry [15] and electrothermal atomic absorption spectrometry (ETAAS) [16] were used for chromium determination and speciation. However, the high cost of instrumental and difficulty matrix in human samples caused to use of these techniques with sample preparation methods.…”

Section: Introductionmentioning

confidence: 99%

Speciation of chromium in blood samples based on dithioglycerol immobilized on carbon nanotube by dispersive micro solid phase bioextraction

Esmaeili

Kolvari

Rakhtshah

2020

Anal. Method Environ. Chem. J.

View full text Add to dashboard Cite

A novel method based on the synthesis of dithioglycerol immobilized on carbon nanotubes (CNTs@DTG) was used for speciation of chromium (Cr III and Cr VI) in human blood samples by dispersive micro solid-phase bio extraction (D-μ-SPBE). By procedure, a mixture containing acetone, 1-octyl-3-methylimidazolium hexafluorophosphate ([OMIM][PF6]), and CNTs@DTG were injected into 5 mL of the standard sample containing 1.0 μg L-1 of Cr III and Cr VI which was diluted with DW up to 10 mL at optimized pH. The Cr (VI) anions and Cr (III) cations were efficiently extracted by HS of CNTs@DTG at pH 2 and 6, respectively (HS.....Cr), and trapped into IL phase at the bottom of the conical tube. Then, Cr (III) and Cr(VI) ions were back-extracted before determined by electrothermal atomic absorption spectrometry (ETAAS). The enrichment factor (EF), linear range, and limit of detection (LOD) were obtained 9.85, 0.12-3.88 μg L-1, and 30 ng L-1, respectively.

show abstract

Multi-element determination of Cd, Pb, Cu, V, Cr, and Mn in ethanol fuel samples using energy dispersive X-ray fluorescence spectrometry after magnetic solid phase microextraction using CoFe2O4 nanoparticles

Cited by 34 publications

References 32 publications

Biodiesel Trace Element Analysis by Energy Dispersive X-ray Fluorescence Spectrometry Using Magnetic Solid-Phase Microextraction

Biodiesel Trace Element Analysis by Energy Dispersive X-ray Fluorescence Spectrometry Using Magnetic Solid-Phase Microextraction

Reversed-phase dispersive liquid–liquid microextraction for elemental analysis of gasoline by inductively coupled plasma optical emission spectrometry

Speciation of chromium in blood samples based on dithioglycerol immobilized on carbon nanotube by dispersive micro solid phase bioextraction

Contact Info

Product

Resources

About