Straightforward determination of U, Th, and Hf at trace levels using ultrasonic nebulization and axial view ICP OES

Martins, Camila Alves; Scheffler, Guilherme Luiz; Pozebon, Dirce

doi:10.1039/c5ay02932e

Cited by 7 publications

(2 citation statements)

References 27 publications

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“…There are several reported techniques capable of detecting uranium in environmental samples, such as: fluorometry [ 8 , 9 ], X-ray fluorescence [ 10 , 11 ], potentiometry [ 12 , 13 ], inductively coupled plasma emission spectrometry (ICP OES) [ 14 , 15 , 16 ], inductively coupled plasma mass spectrometry (ICP-MS) [ 17 , 18 ], and spectrophotometry [ 5 , 19 , 20 , 21 , 22 , 23 ]. Among all these techniques, spectrophotometry has a lot of applications.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Application of a New Polymer with Imprinted Ions for the Preconcentration of Uranium in Natural Water Samples and Determination by Digital Imaging

et al. 2023

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This work proposes the synthesis of a new polymer with imprinted ions (IIP) for the pre-concentration of uranium in natural waters using digital imaging as a detection technique. The polymer was synthesized using 2-(5-bromo-2-pyridylazo)-5-diethylaminophenol (Br-PADAP) for complex formation, ethylene glycol dimethacrylate (EGDMA) as a crosslinking reagent, methacrylic acid (AMA) as functional monomer, and 2,2′-azobisisobutyronitrile as a radical initiator. The IIP was characterized by Fourier transform infrared spectroscopy and scanning electron microscopy (FTIR). Uranium determination was performed using digital imaging (ID), and some experimental conditions (sample pH, eluent concentration, and sampling flow rate) were optimized using a two-level full factorial design and Doelhert response surface methodology. Thus, using the optimized conditions, the system allowed the determination of uranium with detection and quantification limits of 2.55 and 8.51 µg L−1, respectively, and a pre-concentration factor of 8.2. All parameters were determined using a 25 mL sample volume. The precision expressed as relative deviation (RSD%) was 3.5% for a solution with a concentration of 50 µg L−1. Given this, the proposed method was used for the determination of uranium in four samples of natural waters collected in the city of Caetité, Bahia, Brazil. The concentrations obtained ranged from 35 to 75.4 μg L−1. The accuracy was evaluated by the addition/recovery test, and the values found ranged between 91 and 109%.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Application of a New Polymer with Imprinted Ions for the Preconcentration of Uranium in Natural Water Samples and Determination by Digital Imaging

et al. 2023

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“…The best-known and conventionally applied sample introduction system, based on pneumatic nebulization (PN), provides a quite low transport efficiency of analytes into a plasma source (typically up to 5%) [1]. Therefore, it is not surprising that alternative sample introduction techniques are being developed, e.g., ultrasonic nebulization (USN) [2][3][4][5], hydride generation (HG) [5][6][7][8], and photochemical vapor generation (PVG) [8][9][10]. Relatively new approaches, based on electric discharge phenomena, are also increasingly appreciated, including dielectric barrier discharge (DBD) [11], electrolyte-as-cathode glow discharge (ELCAD) [12], and other ELCAD-derived microplasmas, e.g., solution cathode glow discharge (SCGD) [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Hanging drop cathode-atmospheric pressure glow discharge as a new method of sample introduction for inductively coupled plasma-optical emission spectrometry

et al. 2020

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This work reports the use of hanging drop cathode-atmospheric pressure glow discharge (HDC-APGD) as a new method of sample introduction for inductively coupled plasma-optical emission spectrometry (ICP-OES). The developed arrangement was characterized by a low sample uptake (0.56 mL min−1) and the fact that the entire sample solution volume was consumed by the discharge. This resulted in a very high transport efficiency of analytes from the sample solution into the ICP torch (usually > 80%). Under the optimal operating conditions of HDC-APGD, intensities of emission lines of studied elements were, on average, 2 times higher as compared to those obtained with conventional pneumatic nebulization (PN). Moreover, in the case of I and Y, the observed signal enhancements were even higher, i.e., 6.2 and 6.1 times, respectively. It was also shown that in the case of B and some elements that are known to form different volatile species (Ag, Bi, Cd, Hg, Os, Pb, and Se), the presence of low molecular weight organic compounds in the sample solution, i.e., CH3OH, C2H5OH, HCOOH, CH3COOH, or HCHO, resulted in the additional enhancement of their signals. It was especially evident in the case of Hg for which a 8.6-fold signal enhancement in the presence of HCOOH was noticed. The system presented herein was distinguished from other competitive APGD-type discharges because it could be successfully used for the determination of a vast group of elements, including alkali metals, alkaline earth metals, transition metals, and non-metals.

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Highly efficient uranium(VI) removal from aqueous solution using poly(cyclotriphosphazene-co-4,4′-diaminodiphenyl-ether) crosslinked microspheres

Wang

Liu

et al. 2019

J Radioanal Nucl Chem

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Straightforward determination of U, Th, and Hf at trace levels using ultrasonic nebulization and axial view ICP OES

Abstract: Low concentrations of U, Hf, and Th were quantified using USN and axial view ICP OES, without matrix separation/analyte preconcentration.

Cited by 7 publications

References 27 publications

Synthesis and Application of a New Polymer with Imprinted Ions for the Preconcentration of Uranium in Natural Water Samples and Determination by Digital Imaging

Synthesis and Application of a New Polymer with Imprinted Ions for the Preconcentration of Uranium in Natural Water Samples and Determination by Digital Imaging

Hanging drop cathode-atmospheric pressure glow discharge as a new method of sample introduction for inductively coupled plasma-optical emission spectrometry

Highly efficient uranium(VI) removal from aqueous solution using poly(cyclotriphosphazene-co-4,4′-diaminodiphenyl-ether) crosslinked microspheres

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