GB/T 13070-2025 English PDFGB/T 13070: Historical versions
Basic dataStandard ID: GB/T 13070-2025 (GB/T13070-2025)Description (Translated English): Determination of uranium content in uranium ores - Potentiometric titration Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: D45 Classification of International Standard: 07.030 Word Count Estimation: 11,127 Date of Issue: 2025-08-29 Date of Implementation: 2025-12-01 Older Standard (superseded by this standard): GB/T 13070-1991 Issuing agency(ies): State Administration for Market Regulation; Standardization Administration of China GB/T 13070-2025: Determination of uranium content in uranium ores - Potentiometric titration---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT13070-2025ICS 07.030 CCSD45 National Standards of the People's Republic of China Replaces GB/T 13070-1991 Determination of uranium in uranium ore by potentiometric titration Published on 2025-08-29 Implemented on December 1, 2025 State Administration for Market Regulation The State Administration for Standardization issued a statement. Table of ContentsPreface III 1.Scope 1 2 Normative References 1 3.Terms and Definitions 1 4.Principle 1 5.Reagents or materials 1 6.Instruments and Equipment 2 7 Samples 2 8.Experimental Procedure 3 9.Experimental Data Processing 4 10 Precision 4 11 Quality Assurance and Control 5 Appendix A (Normative) Preparation and Standardization of Ammonium Vanadate Titration Solution 6ForewordThis document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document supersedes GB/T 13070-1991 "Determination of Uranium in Uranium Ore by Potentiometric Titration" and is consistent with GB/T 13070-1991. Aside from structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application has been changed (see Chapter 1, Chapter 1 of the.1991 edition); b) An automatic potentiometric titrator was added (see 6.2); c) The electrodes were changed (see 6.5, 5.5 and 5.6 in the.1991 edition); d) The sample particle size was changed (see 7.1, 6.1 in the.1991 edition); e) An additional formula for calculating the titer of ammonium vanadate has been added (see Chapter 9); f) Improved the precision of ferrous and titanate-ammonium vanadate potentiometric titrations using an automated potentiometric titrator (see Chapter 10); g) A comparison table of the amount of ammonium vanadate needed to prepare different concentrations and the amount of uranium required for calibration has been added (see Table A.1). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed and is under the jurisdiction of the National Nuclear Energy Standardization Technical Committee (SAC/TC58). This document was drafted by. Beijing Research Institute of Geology, Nuclear Industry; Institute of Standardization, Nuclear Industry; 230th Research Institute, Nuclear Industry. Research Institute No. 240, National Nuclear Security Technology Center, and Beijing Research Institute of Chemical Metallurgy of Nuclear Industry. The main drafters of this document are. Huang Qiuhong, Wang Tiejian, Li Bowen, Wang Yuxue, Wang Xinyu, Zheng Jijia, Zhang Xin, Liu Jinliang, Hu Dehua, and Li Xi. Guo Guolong. The release history of this document and the document it replaces is as follows. ---First published in.1991 as GB/T 13070-1991; ---This is the first revision. Determination of uranium in uranium ore by potentiometric titration Warning---Personnel using this document should have practical experience working in a formal laboratory. This document does not address all possible safety issues. Users are responsible for taking appropriate safety and health measures and ensuring compliance with relevant national regulations. 1.Scope This document describes the reagents or materials, instruments, equipment, samples, test procedures, and test data for the potentiometric titration method for determining the uranium content in uranium ore. This includes aspects such as processing, precision, quality assurance, and control. This document applies to the determination of uranium content in uranium ore, and also to the determination and testing of pure uranium substances such as metallic uranium and uranium oxide. The ferrous-ammonium vanadate titration method is used for the determination of uranium content in the range of 0.01% to 15%, with values less than or equal to 10 mg molybdenum, 4.2 mg vanadium, and 3 mg cerium. 5 mg of zirconium does not interfere with the determination. The uranium content determination range using the titration method with ammonium vanadate is 0.01% to 15%, with values less than or equal to 25 mg molybdenum, 0.1 mg vanadium, and 1.5 mg cerium. 4 mg of zirconium does not interfere with the determination. Generally, the amount of impurities in uranium ore is less than the above-mentioned interference limit and does not interfere with the determination.2 Normative referencesThe contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 6379.2 Accuracy (correctness and precision) of measurement methods and results - Part 2.Determining the repeatability of standard measurement methods Basic methods of sex and representation GB/T 6682 Specifications and test methods for water used in analytical laboratories 3.Terms and Definitions This document does not contain any terms or definitions that need to be defined. 4.Principles The sample was decomposed with hydrochloric acid, hydrofluoric acid, and phosphoric acid. Uranium(VI) in the solution was reduced to uranium(VI) in phosphoric acid medium using ferrous ammonium sulfate or titanium trichloride. Uranium(IV) is oxidized with sodium nitrite to remove excess reducing agent; stable uranium(IV) is not oxidized, and excess sodium nitrite is removed with urea. Vanadic acid is used. The ammonium solution was titrated to the endpoint, and the ionic reaction equation is given in formula (1). The amount of ammonium vanadate consumed at the titration endpoint was calculated based on the sample concentration. The uranium content in the medium. U4 2VO3- 4H =UO22 2VO2 2H2O (1) 5.Reagents or materials Warning---Hydrofluoric acid is toxic and corrosive. ......Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of GB/T 13070-2025_English be delivered?Answer: Upon your order, we will start to translate GB/T 13070-2025_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 13070-2025_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 13070-2025_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. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. If you need your currency to be printed on the invoice, please write an email to Sales@ChineseStandard.net. In 2 working-hours, we will create a special link for you to pay in any currencies. Otherwise, follow the normal steps: Add to Cart -- Checkout -- Select your currency to pay.Question 5: Should I purchase the latest version GB/T 13070-2025?Answer: Yes. Unless special scenarios such as technical constraints or academic study, you should always prioritize to purchase the latest version GB/T 13070-2025 even if the enforcement date is in future. Complying with the latest version means that, by default, it also complies with all the earlier versions, technically. |
