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Methods for analysis of uranium ore concentrate - Part 16: Determination of phosphorus - Spectrophotometric method
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GB/T 11848.16-2025
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| GB/T 11848.16-1991 | English | 279 |
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Determination of phosphorus in uranium ore concentrate by spectrophotometry
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GB/T 11848.16-1991
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Standard similar to GB/T 11848.16-2025 GB/T 11848.10 GB/T 11848.11 GB/T 11848.12 Basic data | Standard ID | GB/T 11848.16-2025 (GB/T11848.16-2025) | | Description (Translated English) | Methods for analysis of uranium ore concentrate - Part 16: Determination of phosphorus - Spectrophotometric method | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | F46 | | Classification of International Standard | 27.120.30 | | Word Count Estimation | 10,129 | | Date of Issue | 2025-10-05 | | Date of Implementation | 2026-05-01 | | Older Standard (superseded by this standard) | GB/T 11848.16-1991 | | Issuing agency(ies) | State Administration for Market Regulation and Standardization Administration of China | GB/T 11848.16-2025: Methods for analysis of uranium ore concentrate - Part 16: Determination of phosphorus - Spectrophotometric method
---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.
ICS 27.120.30
CCSF46
National Standards of the People's Republic of China
Replaces GB/T 11848.16-1991
Analytical methods for uranium ore concentrates
Part 16.Determination of Phosphorus by Spectrophotometry
Published on 2025-10-05
Implemented on May 1, 2026
State Administration for Market Regulation
The State Administration for Standardization issued a statement.
Foreword
This 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 is Part 16 of GB/T 11848, "Analytical Methods for Uranium Ore Concentrates". GB/T 11848 has been published with the following...
part.
---Part 1.Determination of Uranium by Ferrous Sulfate Reduction-Potassium Dichromate Titration;
---Part 2.Determination of Nitric Acid-Insoluble Uranium by Spectrophotometry;
---Part 3.Gravimetric determination of extractable organic compounds;
---Part 4.Determination of Arsenic and Mercury by Hydride Generation-Atomic Fluorescence Spectrometry;
---Part 5.Determination of Carbonate by Infrared Absorption Spectroscopy;
---Part 6.Determination of Fluorine by Ion-Selective Electrode Method;
---Part 7.Determination of Halogens - Volhard Method;
---Part 8.Determination of Moisture Content by Gravimetric Method;
---Part 9.Determination of Silicon by Spectrophotometry;
---Part 10.Determination of Sulfur by Infrared Absorption Spectroscopy;
---Part 11.Determination of Thorium by Inductively Coupled Plasma Mass Spectrometry;
---Part 12.Determination of Boron by Inductively Coupled Plasma Mass Spectrometry;
---Part 14.Determination of Potassium and Sodium by Atomic Absorption Spectrometry;
---Part 15.Determination of Iron, Calcium, Magnesium, Molybdenum, Titanium, Vanadium, and Zirconium by Inductively Coupled Plasma Atomic Emission Spectrometry;
---Part 16.Determination of Phosphorus by Spectrophotometry
This document supersedes GB/T 11848.16-1991 "Determination of Phosphorus in Uranium Ore Concentrates - Spectrophotometric Method", and is consistent with GB/T 11848.16-
Compared to.1991, aside from structural adjustments and editorial changes, the main technical changes are as follows.
---The sample colorimetric method has been changed (see 8.3.2, 8.3.3, and 6.1.2~6.1.4 of the.1991 edition);
---Added requirements for quality assurance and control (see Chapter 11);
---Added test report requirements (see Chapter 12).
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 Chemical Metallurgy of Nuclear Industry, Sanmen Nuclear Power Co., Ltd., CGN Uranium Development Co., Ltd., and CNNC.
272 Uranium Industry Co., Ltd., CNNC 404 Co., Ltd., Hainan Nuclear Power Co., Ltd., Xinjiang CNNC Tianshan Uranium Industry Co., Ltd., Nuclear Industry
Industry Standardization Research Institute, China Nuclear Mining Technology Group Co., Ltd.
The main drafters of this document are. Sun Haobo, Sun Xiaoguang, Li Tao, Wang Lingen, Guo Xinfeng, Li Liang, Wang Haisheng, Cao Xinran, Wang Bo, and Guo Guolong.
Hou Tao, Meng Xianbo, Li Jianxing, Wang Tingting, Wang Dabo, Zhao Jing, Li Yuwen, Zhao Qiang, Dong Fangfang, Ding Hongfang, Zhou Libin, Wei Xi, Du Kaihua.
The release history of this document and the document it replaces is as follows.
---First published in.1991 as GB/T 11848.16-1991;
---This is the first revision.
Introduction
Uranium ore concentrate is an intermediate product resulting from the processing, purification, and enrichment of uranium ore. It is a primary raw material for the production of nuclear fuel and is mainly used in
In the energy and defense sectors, GB/T 11848, "Analytical Methods for Uranium Ore Concentrates," describes the chemical analysis of the elemental content in uranium concentrates.
The method is designed to meet the needs of quality arbitration and inspection of uranium ore concentrates.
GB/T 11848 is proposed to consist of fifteen parts.
---Part 1.Determination of Uranium by Ferrous Sulfate Reduction-Potassium Dichromate Titration. The aim is to provide a corresponding detection method for uranium in uranium ore concentrates.
Verification method.
---Part 2.Determination of Nitric Acid-Insoluble Uranium by Spectrophotometry. The purpose is to provide a phase-specific method for determining nitric acid-insoluble uranium in uranium ore concentrates.
The testing method should be used.
---Part 3.Determination of Extractable Organic Matter by Gravimetric Method. The purpose is to provide corresponding detection methods for extractable organic matter in uranium ore concentrates.
Verification method.
---Part 4.Determination of Arsenic and Mercury by Hydride Generation-Atomic Fluorescence Spectrometry. The aim is to provide information on the determination of arsenic and mercury in uranium ore concentrates.
The corresponding testing methods.
---Part 5.Determination of Carbonate by Infrared Absorption Spectroscopy. The purpose is to provide a corresponding test for carbonate in uranium ore concentrates.
method.
---Part 6.Determination of Fluorine by Ion-Selective Electrode Method. The aim is to provide a corresponding method for the determination of fluorine in uranium ore concentrates.
---Part 7.Determination of Halogens - Volhard Method. The aim is to provide a corresponding method for the determination of halogens in uranium ore concentrates.
---Part 8.Determination of Moisture by Gravimetric Method. The purpose is to provide a corresponding method for the determination of moisture in uranium ore concentrates.
---Part 9.Determination of Silicon by Spectrophotometry. The aim is to provide a corresponding method for the detection of silicon in uranium ore concentrates.
---Part 10.Determination of Sulfur by Infrared Absorption Method. The aim is to provide a corresponding method for the detection of sulfur in uranium ore concentrates.
---Part 11.Determination of Thorium by Inductively Coupled Plasma Mass Spectrometry. The aim is to provide a corresponding detection method for thorium in uranium ore concentrates.
Test method.
---Part 12.Determination of Boron by Inductively Coupled Plasma Mass Spectrometry. The aim is to provide a corresponding detection method for boron in uranium ore concentrates.
Test method.
---Part 14.Determination of Potassium and Sodium by Atomic Absorption Spectrometry. The purpose is to provide corresponding testing methods for potassium and sodium in uranium ore concentrates.
method.
---Part 15.Determination of Iron, Calcium, Magnesium, Molybdenum, Titanium, Vanadium, and Zirconium by Inductively Coupled Plasma Atomic Emission Spectrometry. The aim is to provide information on uranium...
The corresponding test methods for iron, calcium, magnesium, molybdenum, titanium, vanadium and zirconium in ore concentrates.
---Part 16.Determination of Phosphorus by Spectrophotometry. The aim is to provide a corresponding method for the determination of phosphorus in uranium ore concentrates.
Analytical methods for uranium ore concentrates
Part 16.Determination of Phosphorus by Spectrophotometry
Warning---Personnel using this document should have practical experience working in a formal laboratory. This document does not cover all possible safety issues.
Users are responsible for taking appropriate safety and protective measures and ensuring compliance with relevant national regulations. This document covers the following.
Toxic and hazardous waste should be collected and stored centrally, and the collection of all types of waste should be strictly carried out in accordance with the relevant regulations and technical standards of the national environmental protection administration.
Processing in the middle.
1 Scope
This document describes a method for determining phosphorus in uranium ore concentrates.
This document applies to the determination of phosphorus in uranium ore concentrates, with a measurement range of 0.0025% to 2.5%.
2 Normative references
The 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 6682 Specifications and test methods for water used in analytical laboratories
GB/T 10268 Uranium Ore Concentrates
3 Terms and Definitions
The terms and definitions defined in GB/T 10268 apply to this document.
4.Principles
The sample was dissolved in nitric acid. In the acidic solution, phosphate ions reacted with ammonium molybdate to form a soluble yellow phosphomolybdic heteropolyacid complex. This complex was then catalyzed.
In the presence of an agent, ascorbic acid was used to reduce phosphomolybdate yellow to a phosphomolybdate blue complex, the absorbance of which was directly proportional to the phosphorus content. The absorbance was measured at a wavelength of 700 nm.
Determined by spectrophotometry.
5.Reagents or materials
Unless otherwise specified, only analytical grade reagents were used in the analysis. The water used in the tests met the requirements of Grade II water as specified in GB/T 6682.
5.1 Hydrofluoric acid, ρ=1.15g/mL.
5.2 Hydrogen peroxide, ρ=1.13g/mL.
5.3 Nitric acid, ρ=1.42g/mL.
5.4 Nitric acid solution, c=1mol/L.
Measure 66.7 mL of nitric acid (5.3), place it in a 1000 mL beaker, dilute with water to 1000 mL, and store in a reagent bottle.
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GB/T 11848.16-2025: Methods for analysis of uranium ore concentrate - Part 16: Determination of phosphorus - Spectrophotometric method
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