Analytical possibilities of different X-ray fluorescence systems for determination of trace elements in aqueous samples pre-concentrated with carbon nanotubes

Marguí, Eva; Zawisza, Beata; Skorek, Robert; Theato, T.; Queralt, I.; Hidalgo, Manuela; Sitko, Rafał

doi:10.1016/j.sab.2013.07.004

Cited by 26 publications

(17 citation statements)

References 14 publications

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“…This increased signal strength greatly influences the detection sensitivities of various elements in TXRF excitation. The minimum detection limits (MDLS) obtained for different elements using the formalism These findings are consistent with the experimental observations reported by Margui 15 . They showed that the quantification of Cadmium in 100mL aqueous samples in the range of 1-20 µg is only practicable by using polarized energy dispersive x-ray fluorescence instrument (P-EDXRF) in contrast to the conventional EDXRF and WDXRF spectrometer.…”

Section: Methodssupporting

confidence: 90%

Effect of synchrotron polarization on grazing incidence X-ray fluorescence analysis

Das

Tiwari

Singh

et al. 2014

J. Anal. At. Spectrom.

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Abstract:Total reflection x-ray fluorescence (TXRF) spectroscopy has seen a remarkable progress over the past years. Numerous applications in basic and applied sciences prove its importance. The large spectral background which is a major detrimental factor in the conventional x-ray fluorescence technique, limits the element detection sensitivities of the technique to µg/g (ppm) range. This spectral background reduces to a great extent in the TXRF technique due to the low extinction depth of the

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Section: Methodssupporting

confidence: 90%

Effect of synchrotron polarization on grazing incidence X-ray fluorescence analysis

Das

Tiwari

Singh

et al. 2014

J. Anal. At. Spectrom.

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“…Furthermore, the surface area of the graphene oxide nanosheets loaded on the filter plays also an important role for obtaining good sensitivity. It was previously demonstrated [24,25] that if the area of the sample is good fitted to the focal spot size, a bigger fraction of the adsorbed elements are excited and, as a consequence, better sensitivity can be obtained. For this reason, a commercially available vacuum filter assembly of 22-mm diameter size was replaced with one of 5 mm diameter.…”

Section: Resultsmentioning

confidence: 99%

Dispersive micro solid-phase extraction of heavy metals as their complexes with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol using graphene oxide nanoparticles

Pytlakowska

2015

Microchim Acta

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This article describes a new procedure for multielement preconcentration of heavy metal ions, specifically of Cr(III), Co(II), Ni(II), Cu(II), Zn(II) and Pb(II) ions. The method is based on dispersive micro solid-phase extraction (DMSPE) of the metal complexes of 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (5-Br-PADAP) by graphene oxide nanoparticles prior to energy dispersive Xray fluorescence spectrometric (EDXRF) determination. The effects of pH, amount of graphene oxide, concentration of complexing reagent, sample volume and sorption time were optimized. The influence of commonly encountered other ions was also investigated. Under optimal conditions, the calibration plots cover the 2 to 150 ng mL −1 range for each element. The precision (at a 20 ng mL −1 level for n = 10) is lower than 4.8 %, and the detection limits range is from 0.07 to 0.25 ng mL −1 . The DMSPE-EDXRF procedure was successfully applied to the determination of heavy metal ions in water and spiked water samples with recoveries between 94.4 and 103.5 %.

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“…Now the materials, functionalized graphene or CNT, having greater surface area and also charge on it are suitable for the electrodeposition of the HMIs. Apart from these qualities, defects introduced during the functionalization process and their inherent good electrical conductivity have the added advantage for this application [25][26][27]. Likewise, nanomaterials other than carbon substrate can also be used.…”

Section: Electrochemical Adsorptionmentioning

confidence: 99%

Electrochemical and Optical Methods for the Quantification of Lead and Other Heavy Metal Ions in Liquid Samples

Devaramani¹,

Banuprakash²,

Doreswamy³

et al. 2021

Heavy Metals - Their Environmental Impacts and Mitigation

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Minerals and elementary compounds of heavy metals are part of the ecosystem. Because of their high density and property to accumulate in stable forms, they are considered to be highly toxic to animals, plants and humans. Continuous mining activities and industrial effluents are the major sources which are adding toxic heavy metal ions into ecosystem and biota. Hence it is of utmost importance to quantify the levels of heavy metal ions in environmental and biological samples. On the other hand, it is equally important to remove the heavy metal ions and their compounds from the environmental and biological samples. That facilitates the environmental samples to be fit for using, consumption. In this regard, promising quantification methods such as electrochemical, spectrophotometric, naked eye sensing, test strips for spot analysis of heavy metal ions are considered for discussion. The main objective of this chapter is to give the overview of the most practiced quantification approaches available in the literature. Please note that reader cannot find the pin to pin publications regarding the same and that is not the aim of this book chapter.

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Analytical possibilities of different X-ray fluorescence systems for determination of trace elements in aqueous samples pre-concentrated with carbon nanotubes

Cited by 26 publications

References 14 publications

Effect of synchrotron polarization on grazing incidence X-ray fluorescence analysis

Effect of synchrotron polarization on grazing incidence X-ray fluorescence analysis

Dispersive micro solid-phase extraction of heavy metals as their complexes with 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol using graphene oxide nanoparticles

Electrochemical and Optical Methods for the Quantification of Lead and Other Heavy Metal Ions in Liquid Samples

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