Uranium and Thorium Determination in Nuclear Wastewater by Total Reflection X-Ray Fluorescence Spectrometry

YUAN Jian; LIU Xiang-ying; FENG Shuo; XIA Chen-guang; LI Jun-jie

doi:10.7538/hhx.2020.YX.2019098

Journal of Nuclear and Radiochemistry > 2021 > 43(1): 87-90. > DOI: 10.7538/hhx.2020.YX.2019098

YUAN Jian, LIU Xiang-ying, FENG Shuo, XIA Chen-guang, LI Jun-jie. Uranium and Thorium Determination in Nuclear Wastewater by Total Reflection X-Ray Fluorescence Spectrometry[J]. Journal of Nuclear and Radiochemistry, 2021, 43(1): 87-90. DOI: 10.7538/hhx.2020.YX.2019098

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Uranium and Thorium Determination in Nuclear Wastewater by Total Reflection X-Ray Fluorescence Spectrometry

Analytical Laboratory of Beijing Research Institute of Uranium Geology, Beijing 100029, China

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Abstract

A method for the determination of uranium and thorium in nuclear wastewater by total reflection X-ray fluorescence spectrometry(TXRF) with direct sample preparation was established. Ga was used as an internal standard, the detection limits for U, Th are 0.010, 0.008 mg/L, and the relative standard deviation of the standard solution measurement is less than 7%(n=6), and the marked recovery is between 95% and 115%. The method has been applied to the determination of unknown samples, and the results are in good agreement with ICP-MS. The slope of equation of line regression about U and Th is 0.93 and 1.0 respectively. The correlation coefficient of equation about U and Th is 0.997 and 0.999 respectively.
- total reflection X-ray fluorescence spectrometry,
- nuclear wastewater,
- uranium,
- thorium

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