GB/T 40798-2021 English PDFUS$159.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 40798-2021: Chemical analysis method of ion-adsorption rare earth ore - Determination of total rare earth contents - Inductively coupled plasma mass spectrometry Status: Valid
Basic dataStandard 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---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order. 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 ForewordThis 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 spectrometry1 ScopeThis 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 referencesThe 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 values3 Terms and definitionsThere are no terms and definitions that need to be defined in this document.4 PrincipleThe 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 materialsUnless 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 ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 40798-2021_English be delivered?Answer: Upon your order, we will start to translate GB/T 40798-2021_English as soon as possible, and keep you informed of the progress. The lead time is typically 1 ~ 3 working days. The lengthier the document the longer the lead time.Question 2: Can I share the purchased PDF of GB/T 40798-2021_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 40798-2021_English will be deemed to be sold to your employer/organization who actually pays for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. 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