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GB/T 47186-2026Microbeam analysis - Quantitative analysis of rare earth minerals by electron probe microanalyzer (English PDF)

微束分析　稀土矿物的电子探针定量分析方法

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

February 27, 2026

Implementation date

September 1, 2026

Scope

GB/T 47186-2026 is the English-translated version of 微束分析　稀土矿物的电子探针定量分析方法.

GB/T 47186-2026 is the Chinese standard "Microbeam analysis - Quantitative analysis of rare earth minerals by electron probe microanalyzer".

Its scope clause reads: This document describes the selection of standards, the selection of analytical testing conditions, the correction of interference peaks, and the analytical steps for electron probe microanalysis of rare earth mineral composition.

Steps, result processing, and test reports. This document applies to electron probe microanalysis of rare earth minerals, and also to electron probe microanalysis of other rare earth compounds. Its clauses include terms and definitions.

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Document preview — GB/T 47186-2026

National Standard of the People's Republic of China

ICS: 71.040.50
Classification: N 33

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
Introduction
1.Scope
2 Normative References
3.Terms and Definitions
4.Instruments and Equipment
5.Sample Preparation
6 standard samples
6.1 Principles for Selecting Standard Samples
6.2 Rare Earth Element Standards
6.3 Test conditions for rare earth element standards
7.Qualitative Analysis 3.
7.1 General Rules
7.2 Qualitative Analysis Conditions
7.3 Peak Identification
8.Quantitative Analysis
8.1 Overview
8.2 Quantitative Analysis Conditions
8.3 Interference coefficient correction
8.4 Validation of Quantitative Analysis Conditions
8.5 Error in analysis results
9 Test Reports
Appendix A (Informative) Example of Electron Probe Quantitative Analysis of Monazite
References

1 Scope

This document describes the selection of standards, the selection of analytical testing conditions, the correction of interference peaks, and the analytical steps for electron probe microanalysis of rare earth mineral composition.

Steps, result processing, and test reports.

This document applies to electron probe microanalysis of rare earth minerals, and also to electron probe microanalysis of other rare earth compounds.

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 this document, only the version corresponding to that date applies. For undated references, the latest version (including all amendments) applies.

This document.

GB/T 4930 Technical Specifications for Standard Samples for Electron Probe Microscopy Analysis

GB/T 15074 General Rules for Electron Probe Quantitative Analysis

GB/T 17366 Preparation of Samples for Electron Probe Analysis of Minerals and Rocks

GB/T 20725 Guidelines for Qualitative Point Analysis by Electron Probe Microscopy in Microscopic Analysis

GB/T 21636-2021 Electron Probe Microscopy (EPMA) Terminology

GB/T 43749 Microbeam analysis - Electron probe microscopy - Quantitative analysis method for anhydrous carbonate minerals

GB/T 43889 Guidelines for the Implementation of Quality Assurance Procedures for Electron Probe Micrometers (EPMA)

3 Terms and Definitions

The terms and definitions defined in GB/T 21636-2021, as well as the following terms and definitions, apply to this document.

3.1 rare earth elements

The lanthanide elements with atomic numbers from 57 to 71 in the periodic table are lanthanum (La), cerium (Ce), praseodymium (Pr), neodymium (Nd), promethium (Pm), and samarium.

(Sm), europium (Eu), gadolinium (Gd), terbium (Tb), dysprosium (Dy), holmium (Ho), erbium (Er), thulium (Tm), ytterbium (Yb), lutetium (Lu), and atoms with atomic number 21

The term REE refers to a group of 17 elements, including scandium (Sc) and yttrium (Y). It is usually represented by the symbol REE and consists of elements with similar chemical properties. Currently...

In rare earth industry and product standards, rare earth elements generally refer to 15 elements other than promethium (Pm) and scandium (Sc).

[Source. GB/T 15676-2015, 2.2]

3.2 Rare earth minerals

Minerals whose structural formulas include rare earth elements.

Note. Such as monazite, xenotime, bastnaesite, bastnaesite, etc.

3.3 Interfering peak

A spectral peak synthesized from more than one characteristic X-ray peak.

[Source. GB/T 21636-2021, 4.6.9] […]

......
This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 16 pages — is available in the English PDF.

Referenced standards

Normative references

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