rare earth preconcentration
Development and validation of seaFAST-ICP-QMS method
Online preconcentration ICP-MS analysis of rare earth elements in seawater. Geochemistry, Geophysics, Geosystems, 13 (2012), pp. 1-12. Google Scholar. ISO/IEC 17025, 2005. ISO/IEC 17025. (2005). ... Assessing rare earth element concentrations in geothermal and oil and gas produced waters: A potential domestic …
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Preconcentration and Purification of Rare Earth Elements in …
On-line preconcentration of some rare earth elements in water samples using C18-cartridge modified with l-(2-pyridylazo) 2-naphtol (PAN) prior to simultaneous determination by inductively coupled plasma optical emission spectrometry (ICP–OES). Analytica Chimica Acta 2005, 540 (2), 325-332.
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Separation/Preconcentration Techniques for Rare Earth …
The main aim of this chapter exactly characterizes the contribution. The analytical chemistry of the rare earth elements (REEs) very often is highly complicated …
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Magnetic ZnFe2O4 nanotubes for dispersive micro solid-phase
Magnetic ZnFe2O4 nanotubes (ZFONTs) with numerous pores on their walls were synthesized and characterized. They are shown to be a viable sorbent for dispersive micro-solid phase extraction of the trivalent ions of rare earth elements (REEs), specifically of lanthanum, praseodymium, europium, gadolinium, holmium and ytterbium. The …
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Calcium alginate microparticles for rare earth elements
This work presents a method for the single-stage preconcentration and simultaneous determination of 14 rare earth elements (REEs), La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, in fresh waters using calcium alginate (CA) microparticles as a substrate for further determination by single quadrupole inductively coupled plasma mass …
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Chemical speciation and bioavailability of rare earth
The term rare earth (RE) is actually a misnomer that shows a cursory view of these metals good enough for a 5-min review (Hurst 2010).Lanthanide series include rare earth elements (REEs) along with scandium and yttrium, being similar in chemical properties and deposited in ores same like REEs (Connelly 2005; Zdzislaw and …
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Separation and Preconcentration of Impurities in …
different separation/preconcentration procedures are needed to determine both rare earth and non-rare-earth impurities. This article reviews publications of preconcentration …
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Development of a fully automatic separation system coupled with …
Rare earth elements (REEs) are useful geological indicators of marine geochemistry. However, extremely low concentrations (sub-ng L −1) and high-salt matrices result in inefficient measurements.A fully automatic separation system (ELSPE-2 Precon) is used in the online determination of ultra-trace REEs in seawater using inductively …
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Determination of Rare Earth Elements in Pore Water Samples of …
The concentrations of dissolved yttrium and rare earth elements (REY) in sediment pore water provide important geochemical information. ... In addition, using a commercially available automated trace-element preconcentration system, the preconcentration step can be fully automated, saving labor and providing a better …
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Determination of rare earth elements concentrations in natural waters
The method for determination of rare earth elements (REE: La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) total concentrations in mineral waters was developed and validated. The proposed method comprised inductively coupled plasma mass spectrometry (ICP-MS) detection and the 10-fold off-line REE preconcentration.
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Rare Earth Element Preconcentration from Various …
Rare Earth Element Preconcentration from Various Primary and Secondary Sources by Polymeric Ion Exchange Resins. The choice of an appropriate method for rare earth element (REE) preconcentration from industrial by-products is a very difficult task.
ادامه مطلبPreconcentration of Iron, Rare Earth, and Fluorite from …
The occurrence and distribution of rare earth elements (REEs) in mineral and thermal waters encountered in Quaternary, Mesozoic and Permian aquifers of the …
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Determination of rare earth elements in natural water samples – A
A preconcentration factor of 30 was achieved. Method validation was achieved through the analysis of the CRM SLRS-4, with data being comparable to those from other workers. This matrix elimination method decreased the BaO and SrH polyatomic interferences to <0.2%. However, the rare earth oxide interferences were still significant.
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Determination of rare earth elements in human blood serum by
Abstract. The determination of all rare earth elements (REEs) in human blood serum by inductively coupled plasma mass spectrometry (ICP-MS) was performed with the aid of chelating resin (Chelex 100) preconcentration after acid digestion with HNO 3 and HClO 4.When chelating resin preconcentration was carried out at room …
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Determination of rare earth elements in blood serum reference
Determination of rare earth elements in blood serum reference sample by chelating resin preconcentration and inductively coupled plasma mass spectrometry Tohoku J Exp Med. 1996 Jan;178(1):63-74. doi : 10.1620 ... Rare earth elements (REEs) in a blood serum reference sample, which is a freeze-dried sample issued from the National Institute for ...
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Rare earth elements in seawater near hydrothermal vents | Nature
Journal of Earth System Science (2022) Determination of Rare Earth Elements in Pore Water Samples of Marine Sediments Using an Offline Preconcentration Method Hongna Liu
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Rare earths group preconcentration from various primary
The choice of an appropriate method for rare earth element (REE) preconcentration from industrial by-products is a very difficult task. Most of the REE separation reviews focus on liquid ...
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Preconcentration of Iron, Rare Earth, and Fluorite from Bayan …
Request PDF | Preconcentration of Iron, Rare Earth, and Fluorite from Bayan Obo Ore Using Superconducting Magnetic Separation | Bayan Obo ore contains mainly bastnaesite, monazite and associated ...
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An EDTA-β-cyclodextrin material for the adsorption of rare earth
The separation and recovery of Rare earth elements (REEs) from diluted aqueous streams has attracted great attention in recent years because of ever-increasing REEs demand. In this study, a green synthesized EDTA-cross-linked β-cyclodextrin (EDTA-β-CD) biopolymer was prepared and employed in adsorption of aqueous REEs, such as …
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Preconcentration and Purification of Rare Earth …
On-line preconcentration of some rare earth elements in water samples using C18-cartridge modified with l-(2-pyridylazo) 2-naphtol (PAN) prior to simultaneous …
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Characterization and pre-concentration of rare earth elements in
Bastnasite is considered the most important rare earth-bearing mineral as it is the primary ore mineral in the two biggest REE deposits in the world, ... Distribution and preconcentration of critical elements from coal fly ash by integrated physical separations. Int. J. Coal Geol., 261 (2022), pp. 1-10. Google Scholar. Cited by (0)
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Separation and Preconcentration of Impurities in Rare-Earth …
different separation/preconcentration procedures are needed to determine both rare earth and non-rare-earth impurities. This article reviews publications of preconcentration methods for spectral and mass spectral methods of analysis of materials based on REEs and some other analytical methods. It is shown that the most
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Pre-concentration of fluorite from a rare earth element carbonatite
1. Introduction. The main challenge for rare earth element (REE) extraction from primary deposits is the low concentration of REE-bearing minerals present in a variety of gangue minerals, including silicates, carbonates, fluorites, and/or phosphates (Vijayan et al., 1989).Among the residues generated during the pre-concentration of rare earth …
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Matrix separation and preconcentration of rare earth elements …
The determination of rare earth elements in seawater is a challenge due to high salt content of seawater and extremely low concentrations of rare earth elements. Therefore separation of matrix and preconcentration of rare earth elements is necessary for their detection by inductively coupled plasma mass spectrometer.
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Determination of Rare Earth Elements in Pore Water
Request PDF | Determination of Rare Earth Elements in Pore Water Samples of Marine Sediments Using an Offline Preconcentration Method | The concentrations of dissolved yttrium and rare earth ...
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Acid Leaching of Rare Earth Elements from Coal and Coal Ash
Rare earth elements mobility, leaching and recovery by different chemicals treatment on coal samples and calcined samples of Sohagpur Coalfield, Madhya Pradesh, India. ... Distribution and preconcentration of critical elements from coal fly ash by integrated physical separations. International Journal of Coal Geology 2022, 261, 104095.
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An EDTA-β-cyclodextrin material for the adsorption of rare earth
@article{Zhao2016AnEM, title={An EDTA-$beta$-cyclodextrin material for the adsorption of rare earth elements and its application in preconcentration of rare earth elements in seawater.}, author={Feiping Zhao and Eveliina Repo and Yong Meng and Xueting Wang and Dulin Yin and Mika Sillanp{"a}{"a}}, journal={Journal of colloid and …
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Assessing the bioavailability of dissolved rare earths and other …
Reference material BCR-670 (Lemna minor, "duckweed") is one of the very few plant reference materials for which certified data for all rare earths and yttrium (REY) are available. However, biological samples like plants or fungi often include detrital inorganic material because substrate particles (e.g., soil or atmospheric dust) may be closely …
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Biosorption-a green method for the preconcentration of rare earth
The rare earth elements (REEs) consist of yttrium (Y), lanthanum (La), and fourteen lanthanides, i.e., cerium‑lutetium. Some of these REEs including cerium (Ce), ... Application of biosorbents for the preconcentration of REEs is greatly justified as the process is environmentally benign, simple, and economic. On the contrary, unlike ...
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Research progress of rare earth separation methods and …
The experimental results confirm that rare-earth ions can be separated into three groups: light, medium, and heavy, by controlling the selective enrichment behavior of the ions (Table 1). 41 Compared to conventional organic water biphasic extraction, this new method has potential advantages in the group separation of rare-earth ions, which …
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