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GB/T 40798-2021: Chemical analysis method of ion-adsorption rare earth ore - Determination of total rare earth contents - Inductively coupled plasma mass spectrometry
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Chemical analysis method of ion-adsorption rare earth ore - Determination of total rare earth contents - Inductively coupled plasma mass spectrometry
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GB/T 40798-2021
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Basic data | Standard ID | GB/T 40798-2021 (GB/T40798-2021) | | Description (Translated English) | Chemical analysis method of ion-adsorption rare earth ore - Determination of total rare earth contents - Inductively coupled plasma mass spectrometry | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H14 | | Word Count Estimation | 8,867 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 40798-2021: Chemical analysis method of ion-adsorption rare earth ore - Determination of total rare earth contents - Inductively coupled plasma mass spectrometry
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Chemical analysis method of ion-adsorption rare earth ore - Determination of total rare earth contents - Inductively coupled plasma mass spectrometry
ICS 77.120.99
CCSH14
National Standards of People's Republic of China
Chemical analysis method of ionic rare earth ore
Determination of total rare earth
Inductively coupled plasma mass spectrometry
Released on 2021-10-11
2022-05-01 implementation
State Administration for Market Regulation
Issued by the National Standardization Management Committee
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed and managed by the National Rare Earth Standardization Technical Committee (SAC/TC229).
Drafting organizations of this document. Ganzhou Institute of Nonferrous Metallurgy, National Tungsten and Rare Earth Product Quality Supervision and Inspection Center, Jiangxi University of Science and Technology, China
Nonferrous Guilin Mineral Geology Research Institute Co., Ltd., Fujian Changting Jinlong Rare Earth Co., Ltd., Ganzhou Chenguang Rare Earth New Materials Co., Ltd.
Division, Hunan Rare Earth Metal Materials Research Institute, Baotou Rare Earth Research Institute, Steel Research Institute of Nake Testing Technology Co., Ltd., Guohe General Testing and Evaluation Certification
Zhengzhou Stock Company, Qiandong Rare Earth Group Co., Ltd., Xiamen Rare Earth Materials Research Institute, Haixi Research Institute of Chinese Academy of Sciences.
The main drafters of this document. Xie Lu, Li Ying, Liu Hong, Zeng Qingping, Liu Helian, Meng Wenfei, Yang Feng, Wang Jinfeng, Zhang Kun, Wang Guichao, Zhang Hong,
Yang Qianqian, Tian Jia, Wen Bin, Yuan Xiaohong, Chen Tao, Wu Xi, Gu Jihan, Wu Weiming, Zheng Xian, Zhang Wenjuan, Zhang Wenxing, Li Ping.
Chemical analysis method of ionic rare earth ore
Determination of total rare earth
Inductively coupled plasma mass spectrometry
1 Scope
This document specifies the method for determining the total amount of rare earths in ionic rare earth ore.
This document is applicable to the determination of the total amount of rare earths in ionic rare earth ore. Measuring range (mass fraction). 0.010%~0.50%.
2 Normative references
The content of the following documents constitutes an indispensable clause of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to the date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
GB/T 8170 Numerical rounding rules and the expression and determination of limit values
3 Terms and definitions
There are no terms and definitions that need to be defined in this document.
4 Principle
The sample is decomposed with hydrofluoric acid and perchloric acid, heated until the perchloric acid smoke is exhausted, and dissolved completely with nitric acid. In dilute nitric acid medium, with argon plasma
The body is the ionization source, and the mass fraction of fifteen rare earth elements is determined by mass spectrometry. The sum of each mass fraction is the total amount of rare earth elements. Within the measurement
Standard method for correction.
5 Reagents and materials
Unless otherwise specified, only reagents and distilled water or deionized water or equivalent purity water are used in the analysis.
5.1 Hydrofluoric acid (ρ=1.15g/mL).
5.2 Perchloric acid (ρ=1.76g/mL).
5.3 Nitric acid (ρ=1.42g/mL).
5.4 Hydrogen peroxide (ρ=1.19g/mL).
5.5 Nitric acid (1 1).
5.6 Lanthanum standard storage solution. weigh 0.1000g of lanthanum oxide that has been burned at 950°C for 1h [w(REO) >99.5%, w(La2O3/
REO) >99.999%), put in a 100mL beaker, add 10mL of nitric acid (5.5), heat at low temperature to complete dissolution, remove and cool, the solution
Transfer to a 100mL volumetric flask, dilute to the mark with water, and mix well. 1mL of this solution contains 1000μg of lanthanum oxide.
5.7 Cerium standard storage solution. Weigh 0.1000g of cerium oxide that has been burned at 950°C for 1 hour [w(REO) >99.5%,w(CeO2/REO) >
99.999%], placed in a 100mL beaker, add 10mL nitric acid (5.5), 2mL hydrogen peroxide (5.4), heat at low temperature to completely dissolve, remove
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