YS/T 575.4-2025: Methods for Chemical Analysis of Bauxite – Part 4: Determination of Iron Oxide Contents

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Scope

This Document specifies the 1,10-phenanthroline spectrophotometric method and the
potassium dichromate titration method for the determination of ferric oxide content in bauxite.
This Document is applicable to the determination of ferric oxide content in bauxite. The
determination range (mass fraction) is 0.20% ~ 15.00% for the 1,10-phenanthroline
spectrophotometric method; and >15.00% ~ 40.00% for the potassium dichromate titration
method.

Basic Data

Standard ID	YS/T 575.4-2025 (YS/T575.4-2025)
Description (Translated English)	(Methods for chemical analysis of bauxite - Part 4: Determination of iron oxide contents)
Sector / Industry	Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard	H30
Classification of International Standard	71.040.40
Date of Issue	2025-08-19
Date of Implementation	2026-03-01
Older Standard (superseded by this standard)	YS/T 575.4-2007, YS/T 575.5-2007
Issuing agency(ies)	Ministry of Industry and Information Technology
Summary	This standard specifies the methods for determining the ferric oxide content in bauxite using the o-phenanthroline spectrophotometric method and the potassium dichromate titration method. This standard is applicable to the determination of ferric oxide content in bauxite.