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GB/T 18114.3-2025 English PDF

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GB/T 18114.3-2025: Chemical analysis methods for rare earth concentrates - Part 3: Determination of calcium oxide content
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GB/T 18114.3: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 18114.3-2025English359 Add to Cart 4 days [Need to translate] Chemical analysis methods for rare earth concentrates - Part 3: Determination of calcium oxide content Valid GB/T 18114.3-2025
GB/T 18114.3-2010English229 Add to Cart 3 days [Need to translate] Chemical analysis methods of rare earth concentrates -- Part 3: Determination of calcium oxide content Valid GB/T 18114.3-2010
GB/T 18114.3-2000English199 Add to Cart 2 days [Need to translate] Methods for chemical analysis of monazite concentrates. Determination of calcium oxide content Obsolete GB/T 18114.3-2000

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Basic data

Standard ID GB/T 18114.3-2025 (GB/T18114.3-2025)
Description (Translated English) Chemical analysis methods for rare earth concentrates - Part 3: Determination of calcium oxide content
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H14
Classification of International Standard 77.120.99
Word Count Estimation 18,173
Date of Issue 2025-08-01
Date of Implementation 2026-02-01
Older Standard (superseded by this standard) GB/T 18114.3-2010
Issuing agency(ies) State Administration for Market Regulation, Standardization Administration of China

GB/T 18114.3-2025: Chemical analysis methods for rare earth concentrates - Part 3: Determination of calcium oxide content


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ICS 77.120.99 CCSH14 National Standard of the People's Republic of China Replaces GB/T 18114.3-2010 Chemical analysis methods for rare earth concentrates Part 3.Determination of calcium oxide content Released on August 1, 2025 Implementation on February 1, 2026 State Administration for Market Regulation The National Standardization Administration issued

Preface

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting. This document is Part 3 of GB/T 18114 “Chemical analysis methods for rare earth concentrates”. GB/T 18114 has published the following parts. --- Part 1.Gravimetric method for determination of the total amount of rare earth oxides; --- Part 2.Determination of thorium oxide content; --- Part 3.Determination of calcium oxide content; --- Part 4.Determination of niobium oxide, zirconium oxide and titanium oxide content - Inductively coupled plasma optical emission spectrometry; --- Part 5.Determination of aluminum oxide content - Inductively coupled plasma optical emission spectrometry; --- Part 6.Determination of silicon dioxide content; --- Part 7.Determination of iron oxide content - Potassium dichromate titration method; --- Part 8.Determination of rare earth oxide content and proportion; --- Part 9.Determination of phosphorus pentoxide content; --- Part 10.Determination of moisture by gravimetric method; --- Part 11.Determination of fluorine content. This document replaces GB/T 18114.3-2010 "Chemical analysis methods for rare earth concentrates Part 3.Determination of calcium oxide content" and Compared with GB/T 18114.3-2010, in addition to structural adjustments and editorial changes, the main technical changes are as follows. a) The scope of application of the document has been changed (see Chapter 1, Chapter 1 of the.2010 edition); b) Change the sample weight in flame atomic absorption spectrometry (method 1) from 0.1g to 0.3g (see 4.5.1,.2010 edition) 6.1); c) Change the sample flux in flame atomic absorption spectrometry (method 1) from "2g sodium hydroxide 2g sodium peroxide" to "2g sodium hydroxide 2g sodium chloride, 2g sodium peroxide, 2g sodium carbonate" (see 4.5.4.1, 6.4.1 of the.2010 edition); d) Change the washing solution in flame atomic absorption spectrometry (Method 1) from "sodium hydroxide washing solution (20g/L)" to "sodium carbonate washing solution (10g/L)" (See 4.2.7, 3.7 of the.2010 edition); e) Changed the pipetting volume of the test solution for samples with different calcium oxide contents in the flame atomic absorption spectrometry (Method 1) (see Table 1,.2010 Table 1 of the edition); f) The standard addition working curve range for flame atomic absorption spectrometry (Method 1) has been changed (see 4.5.5, 6.4.2 of the.2010 edition); g) Change the “allowable difference” of precision to “reproducibility” (see 4.7.3 and 5.7.3, 8.2 and 16.2 of the.2010 edition); h) Changed the preparation method of ammonium chloride solution and the calibration method of EDTA standard titration solution in EDTA titration method (Method 2) (See 5.2.15, 5.2.18, and 12.17 and 12.20.2 of the.2010 edition); i) The sample weight and pipetting volume for the EDTA titration method (Method 2) have been changed (see Table 4, Table 4 of the.2010 edition); j) Changed the requirements for filter paper and washing solution, the amount of ammonium chloride added, and the amount of magnesium sulfate added in the EDTA titration method (method 2). See 5.4.4.2, 5.4.4.3, 5.4.5, 14.4.2, 14.4.3, 14.4.4 of the.2010 edition); k) Added the method of adjusting the pH value of the titrant using malachite green in the EDTA titration method (Method 2) (see 5.4.5); l) Added the determination requirements for inductively coupled plasma optical emission spectrometry (Method 3) (see Chapter 6). Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed and coordinated by the National Rare Earth Standardization Technical Committee (SAC/TC229). This document was drafted by. Baotou Rare Earth Research Institute, Sichuan Leshan Ruifeng Metallurgical Co., Ltd., Jiangxi University of Science and Technology, Mianning County, Sichuan Province Xing Rare Earth Co., Ltd., Hunan Rare Earth Metal Materials Research Institute Co., Ltd., Qiandong Rare Earth Group Co., Ltd., Gansu Rare Earth New Materials Co., Ltd. Co., Ltd. The main drafters of this document are. Chang Cheng, Liu Xiaojie, Yang Xuezheng, Bao Xiangchun, Zhao Wenyi, Wang Lijuan, Fan Xiaolong, Li Jingyan, Yu Yahui, Hu Tengyue, Liu Helian, Zhang Yanqin, Zheng Tengfei, Su Tingting, Feng Yayun, Deng Qiang, Ye Xinyu, Zheng Jie, Xiong Zhihua, Zhang Yanglin, Yang Youming, Liao Piyong, Xiao Jing, Wang Guichao, Zhang Haiyan, Wen Bin, Zhong Qunying, Luo Zhiya, Li Qiaoxia, Kang Yaxian, Jiang Yuan, Zhang Manning, and Ma Xiuli. This document was first published in.2000, revised for the first time in.2010, and this is the second revision.

introduction

Rare earth concentrate refers to the product of rare earth ore after beneficiation and enrichment, with rare earth content reaching the smelting requirements. Including fluorocarbon cerium ore concentrate, monazite concentrate, fluorocarbon cerium ore-monazite mixed concentrate, fluorocarbon cerium lanthanum concentrate, etc. It has excellent optical, electromagnetic and other physical properties, and can be combined with other materials to form a variety of new materials with different properties and categories, which can greatly improve its The chemical composition is an important evaluation index of rare earth concentrate products. Develop a scientific and accurate chemical composition analysis method. The method standard specifies the scope of application, standardizes reagents and materials, test equipment and procedures, and gives precision data after multiple tests and verifications. It can enhance the consistency and comparability of data between different laboratories and provide a rigorous and standardized technology for the quality verification of rare earth concentrate products. This measure will help promote the production and trade of rare earth concentrate products. This series of standards GB/T 18114 "Chemical analysis methods for rare earth concentrates" focuses on the total amount of rare earth oxides in rare earth concentrates, 15 rare earth elements, The detection of the proportion of earth element oxides and coexisting non-rare earth elements consists of 11 parts in total. --- Part 1.Gravimetric determination of the total amount of rare earth oxides. The purpose is to establish a gravimetric method for the determination of rare earth oxides in rare earth concentrates. Method of substance content. --- Part 2.Determination of thorium oxide content. The purpose is to establish a plasma emission spectrometry and plasma mass spectrometry method for the determination of thorium oxide content in rare earth concentrates. Method for determining the thorium oxide content in water. --- Part 3.Determination of calcium oxide content. The purpose is to establish flame atomic absorption spectrometry, EDTA titration, inductively coupled Method for determining calcium oxide content in rare earth concentrates by plasma atomic emission spectrometry. --- Part 4.Determination of niobium oxide, zirconium oxide and titanium oxide content - Inductively coupled plasma optical emission spectrometry. Method for determining niobium oxide, zirconium oxide and titanium oxide in rare earth concentrates by inductively coupled plasma optical emission spectrometry. --- Part 5.Determination of aluminum oxide content - Inductively coupled plasma optical emission spectrometry. The purpose is to establish an inductively coupled plasma Method for determination of alumina content in rare earth concentrates by volume emission spectrometry. --- Part 6.Determination of silicon dioxide content. The purpose is to establish molybdenum blue spectrophotometry and inductively coupled plasma optical emission spectrometry Method for determining silicon dioxide content in rare earth concentrates. --- Part 7.Determination of iron oxide content Potassium dichromate titration method. The purpose is to establish a potassium dichromate titration method for the determination of rare earth concentrates Method for measuring iron oxide content in water. --- Part 8.Determination of rare earth oxide content and proportion. The purpose is to establish an inductively coupled plasma optical emission spectrometry method for the determination of The present invention relates to a method for determining the content of rare earth oxides in rare earth concentrate by distribution content of rare earth oxides in rare earth concentrate and X-ray fluorescence spectrometry. --- Part 9.Determination of phosphorus pentoxide content. The purpose is to establish a bismuth molybdenum blue spectrophotometric method and inductively coupled plasma Method for determining phosphorus pentoxide content in rare earth concentrates by emission spectrometry. --- Part 10.Determination of moisture - Gravimetric method. The purpose is to establish a gravimetric method for the determination of moisture content in rare earth concentrates. --- Part 11.Determination of fluoride content. The purpose is to establish EDTA titration method, alizarin spectrophotometry and fluoride ion selective electrode Method for determining the fluorine content in rare earth concentrates. All standard methods specified in this document have been tested and verified by multiple laboratories, and the "allowable difference" clause has been modified to the "reproducibility" clause. The standard provides repeatability and reproducibility limits covering at least high, medium and low calcium oxide contents, making the precision requirements of the method more perfect. GB/T 18114.3-2000 was revised in.2010 after its release. Improve the rare earth concentrate product analysis and testing technology and standard system, according to the new industry and market changes and needs, and improve the original method "flame original Based on the "ion absorption spectroscopy" and "EDTA titration method", the "inductively coupled plasma emission spectrometry (method 3)" is added to cover the current The calcium oxide content index in rare earth concentrate products is of concern, which provides a fast and accurate method standard for the determination of the chemical composition of rare earth concentrates. Has good operability. Chemical analysis methods for rare earth concentrates Part 3.Determination of calcium oxide content

1 Scope

This document describes a method for the determination of calcium oxide content in rare earth concentrates. This document applies to the determination of calcium oxide content in rare earth concentrates. This document contains three methods. flame atomic absorption spectrometry (method 1), EDTA titration (method 2), inductively coupled plasma Atomic emission spectrometry (Method 3). Method 1 measurement range (mass fraction). 0.50%~3.00%, Method 2 measurement range (mass fraction). 2.00%~20.00%, determination range of method 3 (mass fraction). 0.50%~20.00%. When the determination range of 0.50% to 5.00% in this document overlaps, Method 3 shall be used as the arbitration method; when the determination range is >5.00% to When there is an overlap of 20.00%, Method 2 is used as the arbitration method.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to This document. GB/T 601 Preparation of standard titration solutions for chemical reagents GB/T 6379.2 Accuracy (trueness and precision) of measurement methods and results Part 2.Determination of repeatability of standard measurement methods Basic methods of sex and reproducibility GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 8170 Rules for rounding off values and expression and determination of limit values JJG694 Atomic Absorption Spectrophotometer JJG768 Emission Spectrometer

3 Terms and Definitions

There are no terms or definitions that require definition in this document. 4 Flame atomic absorption spectrometry (Method 1) 4.1 Principle The sample was melted and decomposed by sodium hydroxide-sodium carbonate-sodium peroxide, and leached with hot water. The sodium carbonate washing solution was washed and filtered to remove aluminum, silicon, phosphorus, etc. After filtration, the precipitate and filter paper are dissolved with hydrochloric acid and hydrogen peroxide, the filter paper is crushed into pulp, bottled and dried for filtration. Lanthanum and EDTA are added during the determination to eliminate co- The calcium oxide was determined by the standard addition method in an atomic absorption spectrometer using an air-acetylene flame in a hydrochloric acid medium. content. 4.2 Reagents or materials Unless otherwise specified, analytical grade or higher reagents and grade II water that complies with GB/T 6682 should be used in the analysis.

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