GB/T 223.13-2025: Iron, steel and alloy - Determination of vanadium content - Titrimetric method and spectrophotometric method

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Scope

This document the methods for determining vanadium content using ferrous
ammonium sulfate titration and tantalum reagent extraction spectrophotometry.
This document applies to the determination of vanadium content in steel and alloys.
Method One is the ferrous ammonium sulfate titration method, applicable to the
determination of vanadium content in steel and alloys with a mass fraction of 0.1% to
10.0%. It is not applicable to the determination of vanadium content in the following
samples. a) specimens containing more than 20% cobalt (mass fraction); b) specimens
containing more than 0.01% cerium (mass fraction); c) specimens containing more than
20% chromium, more than 20% manganese, or more than 18% tungsten (mass fraction),
with a vanadium content less than 0.4%. Method Two is the N-BPHA (tantalum reagent)
extraction spectrophotometric method, applicable to the determination of vanadium
content in steel and cast iron with a mass fraction of 0.005%~0.50%. Method Three is
the tantalum reagent extraction spectrophotometric method, applicable to the
determination of vanadium content in steel and alloys with a mass fraction of
0.005%~0.50%.

Basic Data

Standard ID	GB/T 223.13-2025 (GB/T223.13-2025)
Description (Translated English)	Iron, steel and alloy - Determination of vanadium content - Titrimetric method and spectrophotometric method
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H11
Classification of International Standard	77.080.01
Word Count Estimation	26,215
Date of Issue	2025-08-29
Date of Implementation	2026-03-01
Older Standard (superseded by this standard)	GB/T 223.13-2000, GB/T 223.14-2000
Issuing agency(ies)	State Administration for Market Regulation; Standardization Administration of China