GB/T 18114.9-2025: Chemical analysis methods for rare earth concentrates - Part 9: Determination of phosphorus pentoxide content

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Scope

This Document specifies methods for the determination of phosphorus pentoxide content in
rare earth concentrates.
This Document is applicable to the determination of phosphorus pentoxide content in rare earth
concentrates.
This Document comprises two methods. the bismuth-phospho-molybdenum blue
spectrophotometric method (Method 1) and the inductively coupled plasma optical emission
spectrometric method (Method 2). The determination range (mass fraction) is 0.10% ~ 30.00%;
Method 1 is the arbitration method.

Basic Data

Standard ID	GB/T 18114.9-2025 (GB/T18114.9-2025)
Description (Translated English)	Chemical analysis methods for rare earth concentrates - Part 9: Determination of phosphorus pentoxide content
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H14
Classification of International Standard	77.120.99
Word Count Estimation	10,127
Date of Issue	2025-08-01
Date of Implementation	2026-02-01
Older Standard (superseded by this standard)	GB/T 18114.9-2010
Issuing agency(ies)	State Administration for Market Regulation, Standardization Administration of China