Determination of 15 Rare Earth Elements in Uranium Ore by Open Acid Dissolution-Inductively Coupled Plasma-Mass Spectrometry

ZENG Jiangping; WANG Jiasong; ZHU Yue; ZHANG Nan; WANG Na; WU Liangying; WEI Shuang

doi:10.15898/j.cnki.11-2131/td.202112070197

2022 Vol. 41, No. 5

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ZENG Jiangping, WANG Jiasong, ZHU Yue, ZHANG Nan, WANG Na, WU Liangying, WEI Shuang. Determination of 15 Rare Earth Elements in Uranium Ore by Open Acid Dissolution-Inductively Coupled Plasma-Mass Spectrometry[J]. Rock and Mineral Analysis, 2022, 41(5): 789-797. doi: 10.15898/j.cnki.11-2131/td.202112070197

Citation:

ZENG Jiangping, WANG Jiasong, ZHU Yue, ZHANG Nan, WANG Na, WU Liangying, WEI Shuang. Determination of 15 Rare Earth Elements in Uranium Ore by Open Acid Dissolution-Inductively Coupled Plasma-Mass Spectrometry[J]. Rock and Mineral Analysis, 2022, 41(5): 789-797. doi: 10.15898/j.cnki.11-2131/td.202112070197

Determination of 15 Rare Earth Elements in Uranium Ore by Open Acid Dissolution-Inductively Coupled Plasma-Mass Spectrometry

1.
Tianjin Center, China Geological Survey, Tianjin 300170, China
2.
North China Center for Geoscience Innovation, Tianjin 300170, China
3.
Key Laboratory of Coast Geo-Environment, China Geological Survey, Tianjin 300170, China
4.
Tianjin Geological and Mineral Testing Center, Tianjin 300191, China

More Information

Corresponding author: ZHANG Nan, nan5460@126.com

Received Date: 07 December 2021

Revised Date: 17 February 2022

Accepted Date: 13 March 2022

Publish Date: 28 September 2022

Abstract

Abstract

BACKGROUND
Studying the characteristics of rare earth elements in uranium ore can determine the source of the ore-forming fluids, the mineralization environment, and the physical and chemical conditions. It is particularly important to accurately determine the content of rare earth elements in uranium ore. At present, rare earth elements are mainly determined by inductively coupled plasma-mass spectrometry (ICP-MS). High-pressure closed acid-dissolution is commonly used. The open acid dissolution method is rarely used because perchloric acid is routinely used to dissolve samples, and the temperature is relatively low, which may cause incomplete decomposition of some samples.
OBJECTIVES
In order to solve the problem that the rare earth elements have contents lower than real values in open acid dissolution.
METHODS
The tetracid system of nitric acid-hydrofluoric acid-perchloric acid-sulfuric acid was used in the open acid dissolution method. ICP-MS with Rh as internal standard was used to determine 15 rare earth elements in uranium ore.
RESULTS
The relative standard deviation (RSD) of the 15 rare earth elements was between 0.54% and 5.98%, and the recovery was between 96.0% and 106.0%. Applying to national rock standard materials (GBW07103, GBW07104, GBW07122), the measured values were consistent with the standard values, and the relative error (RE) was between -8.33% and 7.24%, indicating that this method was effective for the determination of rare earth elements.
CONCLUSIONS
The method has simple operation, accurate and reliable results, and is suitable for the determination of rare earth elements in large quantities of uranium ore.

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