Practical guidelines for best practice on Total Reflection X-ray Fluorescence spectroscopy: Analysis of aqueous solutions

Riaño, Sofía; Regadío, Mercedes; Binnemans, Koen; Hoogerstraete, Tom Vander

doi:10.1016/j.sab.2016.09.001

Cited by 41 publications

(31 citation statements)

References 41 publications

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“…26 Polypropylene microtubes were lled with a certain amount of the sample; an appropriate internal standard was then added, with the X-ray uorescence energy as close as possible to that of the element to be determined in order to reduce the effects caused by absorption of secondary X-rays. Samples were nally diluted to 1 mL with a Triton solution (5% v/v).…”

Section: Analytical Techniquesmentioning

confidence: 99%

Recovery of rare earths from the green lamp phosphor LaPO₄:Ce³⁺,Tb³⁺ (LAP) by dissolution in concentrated methanesulphonic acid

et al. 2018

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A process was developed for the recovery of rare earths from terbium-rich lamp phosphor waste. The process consists of a solvometallurgical leaching step with concentrated methanesulphonic acid (MSA) at temperatures between 433 K to 473 K, followed by solvent extraction with the acidic extractant di-(2-ethylhexyl)phosphoric acid (D2EHPA). Preliminary tests were performed on a synthetic lamp phosphor (LaPO 4 :Ce 3+ ,Tb 3+ , LAP). The optimised conditions were afterwards applied to a real lamp phosphor waste residue, that was obtained after removal of yttrium and europium from lamp phosphor waste powder by a hydrometallurgical process. The leaching can be carried out at lower temperatures than digestion in concentrated sulphuric acid or fused alkali. The process takes advantage of the much higher solubility of the rare-earth methanesulphonates compared to the corresponding sulphates, so that solvent extraction can be performed directly on the leachate after dilution, without the need of several additional steps to convert the rare-earth sulphates into chlorides or nitrates.

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Section: Analytical Techniquesmentioning

confidence: 99%

Recovery of rare earths from the green lamp phosphor LaPO₄:Ce³⁺,Tb³⁺ (LAP) by dissolution in concentrated methanesulphonic acid

et al. 2018

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“…The gain correction was done before starting the analysis. Samples were measured for 600 s. The optimization of the instrumental parameters was performed according to the preparation of aqueous samples proposed by Riano et al which involves 15 min for silicone in isopropanol drying time and 600 s for measurement time [6]. Spectra were analyzed with the Bruker Spectra Picofox version 7.5.3.0 software and the limits of detection were calculated by the same software.…”

Section: Methodsmentioning

confidence: 99%

“…In recent years, TXRF has been used in elemental measurement in water samples. Riaño et al developed a practical and easy guideline for the correct preparation of aqueous samples, showing the effect of different parameters as measurement time, carrier position, sample volume and sample drying time [6]. Floor et al assessed the components contributing to the combined uncertainty budget associated with TXRF measurements using Cu and Fe concentrations in different spiked and natural water samples [7].…”

Section: Articlementioning

confidence: 99%

Feasibility of using Total Reflection X-ray Fluorescence Spectrometry for Drinking Water Analysis

Intima¹,

Silva²,

Trugillo³

et al. 2018

Br J Anal Chem

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The quantitative elemental measurements in drinking water are a very important task since Brazilian legislation establishes the threshold limit value for each element. Besides Atomic Absorption Spectrometry (AAS) and Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES) have been routinely used for this purpose, Total Reflection X-ray Fluorescence spectrometry (TXRF) seems to be a very interesting alternative. It provides a fast and easy sample preparation, low analytical operation and maintenance costs. This study shows the feasibility of using TXRF for monitoring simultaneously the presence of arsenic, barium, lead, copper, chromium, nickel, selenium, uranium, iron, manganese and zinc in drinking water samples. All measurements were performed using TXRF spectrometer, equipped with an air cooled low power X-ray tube (Mo target). For internal calibration, 950 µL of sample was mixed-1 with 50 µL of a standard solution containing 10 mg L of gallium. For most of the elements, the direct quantification by TXRF using Ga as internal standard could be used. For the Cr, Ni and U measurements, analytical calibration curves have to be adopted. The limits of detection for proposed method are appropriate for all elements investigated. In addition, the method showed good precision and accuracy and seems to be a very interesting alternative to be used in the routine analysis involving elemental measurement in drinking water samples analysis.

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“…The concentration of metals in solution was determined by Total Reection X-ray Fluorescence spectroscopy (TXRF) with a Bruker S2 Picofox TXRF spectrometer equipped with a molybdenum source. 25 Plastic microtubes were lled with a certain amount of the sample and diluted until 1 mL with ultrapure water/Triton solution (5% w/w). 26 An appropriate internal standard was added, with the X-ray uorescence energy as close as possible to the element to be determined in order to reduce the effects caused by secondary X-rays absorption.…”

Section: Methodsmentioning

confidence: 99%

Closed-loop solvometallurgical process for recovery of lead from iron-rich secondary lead smelter residues

et al. 2017

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A solvometallurgical process based on the use of concentrated acetic acid as lixiviant is proposed as an alternative for conventional hydrometallurgical processes to recover lead from iron-rich industrial residues generated by recycling of spent lead-acid batteries in a secondary lead smelter. Under the optimal conditions, a high selectivity for lead was obtained: more than 90% of the lead content could be dissolved, while only a small amount of iron (<6%) was codissolved. Lead was quantitatively recovered from the acetic acid leachate by addition of a stoichiometric amount of sulphuric acid. Acetic acid was recycled by distillation and reused in the leaching step, so that a closed-loop process was obtained. The process was optimised for iron-rich residue (matte), but also a proof-of-principle is given for lead recovery from another lead-containing residue (slag). The main advantages of this solvometallurgical process are the low power consumption (room-temperature process), the low consumption of chemicals (only sulphuric acid is consumed), full recycling of the acetic acid and the limitation of waste water formation.

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Practical guidelines for best practice on Total Reflection X-ray Fluorescence spectroscopy: Analysis of aqueous solutions

Cited by 41 publications

References 41 publications

Recovery of rare earths from the green lamp phosphor LaPO₄:Ce³⁺,Tb³⁺ (LAP) by dissolution in concentrated methanesulphonic acid

Recovery of rare earths from the green lamp phosphor LaPO₄:Ce³⁺,Tb³⁺ (LAP) by dissolution in concentrated methanesulphonic acid

Feasibility of using Total Reflection X-ray Fluorescence Spectrometry for Drinking Water Analysis

Closed-loop solvometallurgical process for recovery of lead from iron-rich secondary lead smelter residues

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Practical guidelines for best practice on Total Reflection X-ray Fluorescence spectroscopy: Analysis of aqueous solutions

Cited by 41 publications

References 41 publications

Recovery of rare earths from the green lamp phosphor LaPO4:Ce3+,Tb3+ (LAP) by dissolution in concentrated methanesulphonic acid

Recovery of rare earths from the green lamp phosphor LaPO4:Ce3+,Tb3+ (LAP) by dissolution in concentrated methanesulphonic acid

Feasibility of using Total Reflection X-ray Fluorescence Spectrometry for Drinking Water Analysis

Closed-loop solvometallurgical process for recovery of lead from iron-rich secondary lead smelter residues

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Recovery of rare earths from the green lamp phosphor LaPO₄:Ce³⁺,Tb³⁺ (LAP) by dissolution in concentrated methanesulphonic acid

Recovery of rare earths from the green lamp phosphor LaPO₄:Ce³⁺,Tb³⁺ (LAP) by dissolution in concentrated methanesulphonic acid