GB/T 18114.11-2025 Active National standards

GB/T 18114.11-2025 Chemical analysis methods for rare earth concentrates—Part 11:Determination of fluorine content

GB/T 18114.11-2025 Chemical analysis methods for rare earth concentrates—Part 11:Determination of fluorine content

Publish Date: 2025-08-01 Implement Date: 2026-02-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: GB/T 18114.11-2025

Standard Type: National standards

Standard Status: Active

is_force_gb: no

CCS Name: Analysis methods for rare metals and their alloys

ICS Name: Other non-ferrous metals and their alloys

Publish Date: 2025-08-01

Implement Date: 2026-02-01

Pages: 16 pages

Scope

This document describes the method for determining the fluoride content in rare earth concentrates.
This document is applicable to the determination of fluoride content in rare earth concentrates.
This document includes three methods: EDTA titration (Method 1), Alizarin spectrophotometry (Method 2), and fluoride ion selective electrode (Method 3). The determination range (mass fraction) of Method 1 is 2.00%~20.00%, the determination range (mass fraction) of Method 2 is 0.10%~2.00%, and the determination range (mass fraction) of Method 3 is 0.10%~20.00%.
When there is an overlap in the determination range of 0.10%~5.00% in this document, Method 3 is used as the arbitration method; when there is an overlap in the determination range of >5.00%~20.00%, Method 1 is used as the arbitration method.

Development Information

Word Count: 27 Thousand words Pages: 16 pages

Same series standard

GB/T 18114.3-2025 Chemical analysis methods for rare earth concentrates—Part 3:Determination of calcium oxide content GB/T 18114.8-2025 Chemical analysis methods for rare earth concentrates—Part 8:Determination of rare earth oxide contents and distribution GB/T 18114.9-2025 Chemical analysis methods for rare earth concentrates—Part 9:Determination of phosphorus pentoxide content

Replace the following standards

GB/T 18114.11-2010 Chemical analysis methods of rare earth concentrates—Part 11:Determination of fluorine content—EDTA titration

Referenced Standards

GB/T 601-2002 Chemical reagent Preparations of standard volumetric solutions GB/T 601-2016 Chemical reagent—Preparations of reference titration solutions GB/T 6379.2-2004 Accuracy(trueness and precision)of measurement methods and results—Part 2:Basic method for the determination of repeatability and reproducibility of a standard measurement method GB/T 6682-1992 Water for analytical laboratory use—Specification and test methods GB/T 6682-2008 Water for analytical laboratory use—Specification and test methods GB/T 8170-1987 Rules for rounding off of numberical values GB/T 8170-2008 Rules of rounding off for numerical values & expression and judgement of limiting values JJG 178-2007 Ultraviolet,Visible,Near-Infrared Spectrophotometers

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