Trace and ultratrace determination of heavy metal ions by energy-dispersive X-ray fluorescence spectrometry using graphene as solid sorbent in dispersive micro solid-phase extraction

Kocot, Karina; Sitko, Rafał

doi:10.1016/j.sab.2014.02.003

Cited by 56 publications

(19 citation statements)

References 30 publications

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“…Lachance-Traill equation with α factor was used for correcting matrix effects in pellets and beads. For paper disks, the calibration curves were obtained by linear regression of the intensity ration of WLα/TaLα against the percentage ration of W(%)/ Ta(%), and any correction was not needed because the matrix effect in thin layer sample was almost negligible [21].The resulting equations and their respective correlation coefficients are shown in Fig. 1.…”

Section: Calibrationsmentioning

confidence: 99%

“…For borate fusion and filter paper disk, the SD and RSD of both methods were lower than 0.1% and 1.0%, respectively, suggesting that their precision could meet the requirement of tungsten assay. The main reason for their good reproducibility was that, compared with pressed powder pellet, borate fusion and filter paper disk could eliminate particle size effects and reduce or eliminate matrix effects [21,23].…”

Section: Comparison Of the Precision Of Different Sample Preparation mentioning

confidence: 99%

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Determination of tungsten in tantalum–tungsten alloy by X-ray fluorescence spectrometry using fusion, thin layer, and pressed powder pellet techniques

Tian

Zou

Dai

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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Section: Calibrationsmentioning

confidence: 99%

Section: Comparison Of the Precision Of Different Sample Preparation mentioning

confidence: 99%

Determination of tungsten in tantalum–tungsten alloy by X-ray fluorescence spectrometry using fusion, thin layer, and pressed powder pellet techniques

Tian

Zou

Dai

et al. 2015

Spectrochimica Acta Part B: Atomic Spectroscopy

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“…Therefore, the XRF technology has difficulties in obtaining 3D information for low-density materials with low-Z elements. If possible at all, for even a very light matrix with trace amounts of heavy elements, the very simple determination of trace heavy elements cannot give information about the matrix features (Kocot and Sitko 2014). However, for different low-Z elements or matrix, they have different scattering cross-sections.…”

Section: Confocal X-ray Scatteringmentioning

confidence: 99%

Confocal X-ray technology based on capillary X-ray optics

Sun¹,

Ding²

2015

Reviews in Analytical Chemistry

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Capillary X-ray optics is versatile, and it can be used with synchrotron radiation source, conventional X-ray source, laser-plasma ultrafast X-ray source, and so forth. Recently, the confocal X-ray technology based on capillary X-ray optics has become popular, and it has been widely used in X-ray fluorescence, X-ray absorption fine structure, X-ray diffraction, small-angle X-ray scattering, X-ray imaging, and X-ray scattering. This confocal X-ray technology has applications in many fields, including environmental monitoring, food science, life science, chemistry, physics, nanomaterials, nondestructive test, security check, and so on.

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“…However, EDXRF has low sensitivity and it may be difficult to use liquid and volatile samples, such as sugar cane spirit. Thus, it is common to include a step for metal extraction and preconcentration prior the determinations using the EDXRF [16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Magnetic solid phase microextraction using CoFe2O4 nanoparticles for determination of Cu, Cd, Pb and V in sugar cane spirit samples by energy dispersive X-ray fluorescence spectrometry

Almeida¹,

Meira²,

Dias³

et al. 2019

Br J Anal Chem

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Determination of Cu, Cd, Pb and V in sugar cane spirit samples by EDXRF after preconcentration using CoFe 2 O 4 A method for the determination of Cu, Cd, Pb and V in Brazilian sugarcane spirit ("cachaça" in Brazil) using CoFe 2 O 4 nanoparticles impregnated with 1-(2-pyridylazo)-naphthol (PAN) for extraction of the metals with posterior determination by X-ray fluorescence spectrometry directly in the solid phase is described. The recommended conditions for extraction were: pH 6.0 (1.0 mol L −1 hexamethylenetetramine (HMTA)/ nitric acid buffer solution); sample volume, 25 mL; and nanoparticle mass, 100 mg. The precisions for the determination of each element, expressed as relative standard deviations (RSD) of standard solutions containing 0.20 mg L −1 of each analyte, were 1.5, 1.8, 1.2 and 2.9% (n = 10), respectively. Limits of detection of 0.032, 0.038, 0.016 and 0.028 mg L-1 were obtained for Cu, Cd, Pb and V, respectively. Addition and recovery tests were performed, and the results ranged from 97 to 115% for Cu, 85 to 115% for Cd, 85 to 99% for Pb and 85 to 110% for V. The method was successfully applied in extraction and determination of Cd, Pb, Cu and V in sugar cane spirit samples from Brazil.

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Trace and ultratrace determination of heavy metal ions by energy-dispersive X-ray fluorescence spectrometry using graphene as solid sorbent in dispersive micro solid-phase extraction

Cited by 56 publications

References 30 publications

Determination of tungsten in tantalum–tungsten alloy by X-ray fluorescence spectrometry using fusion, thin layer, and pressed powder pellet techniques

Determination of tungsten in tantalum–tungsten alloy by X-ray fluorescence spectrometry using fusion, thin layer, and pressed powder pellet techniques

Confocal X-ray technology based on capillary X-ray optics

Magnetic solid phase microextraction using CoFe2O4 nanoparticles for determination of Cu, Cd, Pb and V in sugar cane spirit samples by energy dispersive X-ray fluorescence spectrometry

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