GB/T 13070-2025 Determination of uranium content in uranium ores—Potentiometric titration English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS 07.030 CCS D 45
People's Republic of China National Standard
GB/T 13070-2025 Replacing GB/T 13070-1991
Determination of Uranium Content in Uranium Ores - Potentiometric Titration
Issued on August 29, 2025; Implemented on December 1, 2025
Issued by State Administration for Market Regulation Standardization Administration of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Principle
5 Reagents or Materials
6 Instruments and Equipment
7 Samples
8 Test Procedures
9 Test Data Processing
10 Precision
11 Quality Assurance and Control
Appendix A (Normative) Preparation and Standardization of Ammonium Vanadate Titrant
Determination of Uranium Content in Uranium Ores - Potentiometric Titration
WARNING- Personnel using this document shall have practical experience in regular laboratory work. This document does not indicate all potential safety issues. It is the responsibility of the user to implement appropriate safety and health measures and ensure compliance with national regulatory conditions.
1 Scope
This document describes the reagents or materials, instruments and equipment, samples, test procedures, test data processing, precision, quality assurance and control for the determination of uranium content in uranium ores using potentiometric titration.
This document is applicable to the determination of uranium content in uranium ores, as well as the validation and inspection of pure uranium substances such as metallic uranium and uranium oxides.
The ferrous-ammonium vanadate titration method has a determination range of 0.01% to 15% for uranium content. Interferences are not observed when ≤10 mg of molybdenum, ≤4.2 mg of vanadium, ≤3 mg of cerium, or ≤5 mg of zirconium are present.
The titanous-ammonium vanadate titration method has a determination range of 0.01% to 15% for uranium content. Interferences are not observed when ≤25 mg of molybdenum, ≤0.1 mg of vanadium, ≤1.5 mg of cerium, or ≤4 mg of zirconium are present.
The amount of impurities in general uranium ores is usually less than the above interference limits and does not interfere with the determination.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, subsequent amendments (excluding勘误表) or revisions to these documents do not apply. For undated references, the latest edition of the document (including any amendments) applies.
GB/T 6379.2 Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of standard measurement methods
GB/T 6682 Specification and test methods for water for analytical laboratory use
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 hydrochloric acid, hydrofluoric acid, and phosphoric acid. Uranium(VI) in the solution is reduced to uranium(IV) in phosphoric acid medium using ammonium ferrous sulfate or titanium(III) chloride. The excess reducing agent is oxidized with sodium nitrite, and stable uranium(IV) is not oxidized. Urea is used to eliminate excess sodium nitrite. The solution is titrated with ammonium vanadate solution to the endpoint. The ionic reaction equation is shown in formula (1). Based on the amount of ammonium vanadate consumed at the endpoint, the uranium content in the sample is calculated.
Standard
GB/T 13070-2025 Determination of uranium content in uranium ores—Potentiometric titration (English Version)
Standard No.
GB/T 13070-2025
Status
valid
Language
English
File Format
PDF
Word Count
9000 words
Price(USD)
270.0
Implemented on
2025-12-1
Delivery
via email in 1~3 business day
Detail of GB/T 13070-2025
Standard No.
GB/T 13070-2025
English Name
Determination of uranium content in uranium ores—Potentiometric titration
GB/T 13070-2025 Determination of uranium content in uranium ores—Potentiometric titration English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS 07.030 CCS D 45
People's Republic of China National Standard
GB/T 13070-2025 Replacing GB/T 13070-1991
Determination of Uranium Content in Uranium Ores - Potentiometric Titration
Issued on August 29, 2025; Implemented on December 1, 2025
Issued by State Administration for Market Regulation Standardization Administration of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Principle
5 Reagents or Materials
6 Instruments and Equipment
7 Samples
8 Test Procedures
9 Test Data Processing
10 Precision
11 Quality Assurance and Control
Appendix A (Normative) Preparation and Standardization of Ammonium Vanadate Titrant
Determination of Uranium Content in Uranium Ores - Potentiometric Titration
WARNING- Personnel using this document shall have practical experience in regular laboratory work. This document does not indicate all potential safety issues. It is the responsibility of the user to implement appropriate safety and health measures and ensure compliance with national regulatory conditions.
1 Scope
This document describes the reagents or materials, instruments and equipment, samples, test procedures, test data processing, precision, quality assurance and control for the determination of uranium content in uranium ores using potentiometric titration.
This document is applicable to the determination of uranium content in uranium ores, as well as the validation and inspection of pure uranium substances such as metallic uranium and uranium oxides.
The ferrous-ammonium vanadate titration method has a determination range of 0.01% to 15% for uranium content. Interferences are not observed when ≤10 mg of molybdenum, ≤4.2 mg of vanadium, ≤3 mg of cerium, or ≤5 mg of zirconium are present.
The titanous-ammonium vanadate titration method has a determination range of 0.01% to 15% for uranium content. Interferences are not observed when ≤25 mg of molybdenum, ≤0.1 mg of vanadium, ≤1.5 mg of cerium, or ≤4 mg of zirconium are present.
The amount of impurities in general uranium ores is usually less than the above interference limits and does not interfere with the determination.
2 Normative References
The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, subsequent amendments (excluding勘误表) or revisions to these documents do not apply. For undated references, the latest edition of the document (including any amendments) applies.
GB/T 6379.2 Accuracy (trueness and precision) of measurement methods and results - Part 2: Basic method for the determination of repeatability and reproducibility of standard measurement methods
GB/T 6682 Specification and test methods for water for analytical laboratory use
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 hydrochloric acid, hydrofluoric acid, and phosphoric acid. Uranium(VI) in the solution is reduced to uranium(IV) in phosphoric acid medium using ammonium ferrous sulfate or titanium(III) chloride. The excess reducing agent is oxidized with sodium nitrite, and stable uranium(IV) is not oxidized. Urea is used to eliminate excess sodium nitrite. The solution is titrated with ammonium vanadate solution to the endpoint. The ionic reaction equation is shown in formula (1). Based on the amount of ammonium vanadate consumed at the endpoint, the uranium content in the sample is calculated.
