Comparison Method for Uranium Determination in Ore Sample by Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES)

Abstract

A comparison method for the determination (without sample pre-concentration) of uranium in ore by inductively coupled plasma optical emission spectrometry (ICP-OES) has been performed. The experiments were conducted using three procedures: matrix matching, plasma optimization, and internal standardization for three emission lines of uranium. Three wavelengths of Sm were tested as internal standard for the internal standardization method. The robust conditions were evaluated using applied radiofrequency power, nebulizer argon gas flow rate, and sample uptake flow rate by considering the intensity ratio of the Mg(II) 280.270 nm and Mg(I) 285.213 nm lines. Analytical characterization of method was assessed by limit of detection and relative standard deviation values. The certificated reference soil sample IAEA S-8 was analyzed, and the uranium determination at 367.007 nm with internal standardization using Sm at 359.260 nm has been shown to improve accuracy compared with other methods. The developed method was used for real uranium ore sample analysis.

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

“…Zaror et al 13 used HF and HNO 3 to decompose phosphate rocks and marine sediments to determine U by ICP OES. They observed that the U 26 with the exception of the soil sample. When U was measured by monitoring the U(II) 367.007 nm line, the U concentration found in the soil was higher than that certied, regardless of the sample decomposition procedure.…”

2014 atomic spectrometry update – a review of advances in environmental analysis

“…Matrix-matched calibration solutions with high levels of Fe or Mg were required to achieve accurate results. For the ICP-AES measurement of U in uranium ores, 369 the results at three U emission lines were compared using matrix-matched standards, plasma optimisation or an internal standard (Sm) as alternative ways of compensating for matrix interferences. The main factor inuencing precision and accuracy was the U wavelength selected but use of a Sm internal standard improved accuracy at all the lines.…”

Rapid Sample Preparation Using Slug Flow–Laminar Flow: Passive In Situ Microextraction/Stripping Coupling

“…Therefore, the separation and, consequently, detection of rare-earth fission products are particularly important in the HLW treatment process. There are several methods for analyzing radionuclides. − These methods include liquid scintillation counting, molecular absorption spectrometry, atomic absorption spectrometry, − inductively coupled plasma mass spectrometry (ICP-MS), − inductively coupled plasma optical emission spectrometry (ICP-OES), − fluorimetry, , capillary electrophoresis, surface-enhanced Raman spectroscopy, , and voltammetry . Most rare-earth isotopes, such as 144 Ce and 143 Pr, undergo β decay.…”