Simultaneous Spectrophotometric Determination of Uranium and Thorium by Flow Injection Analysis Using Selective Masking

Hirano, Yoshihiro; Ogawa, Yuichi; Oguma, Koichi

doi:10.2116/analsci.19.303

Cited by 27 publications

(12 citation statements)

References 16 publications

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“…Only Cd 2 þ , Pb 2 þ , and Fe 3 þ seriously interfered for determination of uranium. Thus, to eliminate the interference of Cd 2 þ , Pb 2 þ , and Fe 3 þ , the EDTA was used as a masking agent Pournaghi-Azar and Ordoukhanian 1991), which does form a complex with Cd 2 þ , Pb 2 þ , and Fe 3 þ , and a remarkable improvement in the tolerance for Cd 2 þ , Pb 2 þ , and Fe 3 þ was achieved Pournaghi-Azar and Ordoukhanian 1991;Hirano et al 2003).…”

Section: Adsorptive Stripping Voltammetry 1137mentioning

confidence: 99%

Determination of Ultra Trace Amounts of Uranium (VI) by Adsorptive Stripping Voltammetry Using L-3-(3, 4-dihydroxy phenyl) Alanine as a Selective Complexing Agent

et al. 2008

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The spectrophotometric behavior of uranium (VI) with L-3-(3, 4-dihydroxy phenyl) alanine (LDOPA) reagent revealed that the uranium can form a ML 2 complex with LDOPA in solution. Thus a highly sensitive adsorptive stripping voltammetric protocol for measuring of trace uranium, in which the preconcentration was achieved by adsorption of the uranium-LDOPA complex at hanging mercury drop electrode (HMDE), is described. Optimal conditions were found to be a 0.02 M ammonium buffer (pH 9.5) containing 2.0 Â 10 À5 M (LDOPA), an accumulation potential of À0.1 V (versus Ag=AgCl) and an accumulation time of 120 sec.The peak current and concentration of uranium accorded with linear relationship in the range of 0.5-300 ng ml À1 . The relative standard deviation (at 10 ng ml À1 ) is 3.6% and the detection limit is 0.27 ng ml À1 . The interference of some common ions was studied. Applicability to different real samples is illustrated. The attractive behavior of this reagent holds great promise for routine environmental and industrial monitoring of uranium.

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Section: Adsorptive Stripping Voltammetry 1137mentioning

confidence: 99%

Determination of Ultra Trace Amounts of Uranium (VI) by Adsorptive Stripping Voltammetry Using L-3-(3, 4-dihydroxy phenyl) Alanine as a Selective Complexing Agent

et al. 2008

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“…The production of the metal from mining of its ores involves large amounts of waste that increases the possibility of groundwater contamination. Design and synthesis of appropriate ligands that can be used for the analysis and extraction of the cation is essential for solving part of these problems and extensive studies have been dedicated to developing new sensitive and selective spectrophotometric reagents and improving existing procedures in order to develop simple and accessible procedures for the analysis of the cation [1][2][3][4][5][6][7][8][9][10][11] that will enable its detection in waste water.…”

Section: Introductionmentioning

confidence: 99%

Design of a ligand suitable for sensitive uranyl analysis in aqueous solutions

Albo

Buzaglo

Maimon

et al. 2015

Journal of Coordination Chemistry

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Several ligands were designed as plausible reagents for the spectrophotometric analysis of uranyl in aqueous solutions. The ligand L 2À 3 = 3,3′-(ethane-1,2-diylbis(methylazanediyl))bis(methylene)bis(4-hydroxybenzenesulfonate) was found to fit best the requirements. The results point out that carboxylate substituents compete with the phenolate substituents as binding sites to the central uranium cation and therefore decrease the usefulness of ligands containing both carboxylate and phenolate substituents as analytical spectrophotometric reagents.

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“…These days, the methods include inductively coupled plasma atomic emission spectrometry (ICP-AES), 1 inductively coupled plasma-mass spectrometry (ICP-MS), 2,3 ion chromatography (IC), 4 capillary zone electrophoresis (CZE), 5 and flow injection analysis (FIA). 6 However, because these instrumental analyses require rather expensive equipment and higher running costs, they offer limited availability. Although alpha spectrometry has also been used for determination of these radioactive elements, it needs a number of preliminary separation steps for sample preparation, 7 and spectrophotometry has been used for determination of these elements separately and simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Spectrophotometric Determination of Uranium and Thorium Using Arsenazo III by H‐Point Standard Addition Method and Partial Least Squares Regression

Ниази

Ghasemi

Goodarzi

et al. 2007

J Chinese Chemical Soc

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Simultaneous determination of uranium and thorium using arsenazo III as a chromogenic reagent at pH 1.70 by H‐point standard addition method (HPSAM) and partial least squares (PLS) calibration is described. Under optimum conditions, the simultaneous determinations of uranium and thorium by HPSAM were performed. The absorbencies at one pair of wavelengths, 649 and 669 nm, were monitored with the addition of standard solutions of uranium. The results of applying the HPSAM showed that uranium and thorium can be determined simultaneously with weight concentration ratios of uranium to thorium varying from 20:1 to 1:15 in the mixed sample. By multivariate calibration methods such as PLS, it is possible to obtain a model adjusted to the concentration values of the mixtures used in the calibration range. In this study, the calibration model is based on absorption spectra in the 600–750 nm range for 25 different mixtures of uranium and thorium. Calibration matrices contained 0.10–21.00 and 0.25–18.5 μg mL−1 of uranium and thorium, respectively. The RMSEP for uranium and thorium were 0.7400 and 0.7276, respectively. Both proposed methods (HPSAM and PLS) were also successfully applied to the determination of uranium and thorium in several synthetic and real matrix samples.

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Simultaneous Spectrophotometric Determination of Uranium and Thorium by Flow Injection Analysis Using Selective Masking

Cited by 27 publications

References 16 publications

Determination of Ultra Trace Amounts of Uranium (VI) by Adsorptive Stripping Voltammetry Using L-3-(3, 4-dihydroxy phenyl) Alanine as a Selective Complexing Agent

Determination of Ultra Trace Amounts of Uranium (VI) by Adsorptive Stripping Voltammetry Using L-3-(3, 4-dihydroxy phenyl) Alanine as a Selective Complexing Agent

Design of a ligand suitable for sensitive uranyl analysis in aqueous solutions

Simultaneous Spectrophotometric Determination of Uranium and Thorium Using Arsenazo III by H‐Point Standard Addition Method and Partial Least Squares Regression

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