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Database: 189760 (25 Oct 2025)
GB/T 3257.12-1999 English PDF
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GB/T 3257.12-1999
: Methods for chemical analysis of bauxite--Determination of vanadium pentoxide content--N-benzoyl-N-phenythyroxylamine photometric method
Status: Obsolete
GB/T 3257.12: Evolution and historical versions
Standard ID
Contents [version]
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Standard Title (Description)
Status
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GB/T 3257.12-1999
English
279
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Methods for chemical analysis of bauxite--Determination of vanadium pentoxide content--N-benzoyl-N-phenythyroxylamine photometric method
Obsolete
GB/T 3257.12-1999
GB/T 3257.12-1982
English
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3 days [Need to translate]
Methods for chemical analysis of bauxite ores--The N-benzoyl-N-phenylhydroxylamine extraction photometric method for determination of vanadium oxide content
Obsolete
GB/T 3257.12-1982
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Basic data
Standard ID
GB/T 3257.12-1999 (GB/T3257.12-1999)
Description (Translated English)
Methods for chemical analysis of bauxite--Determination of vanadium pentoxide content--N-benzoyl-N-phenythyroxylamine photometric method
Sector / Industry
National Standard (Recommended)
Classification of Chinese Standard
D42
Classification of International Standard
73.06
Word Count Estimation
7,751
Date of Issue
8/30/1999
Date of Implementation
4/1/2000
Older Standard (superseded by this standard)
GB/T 3257.12-1982
Adopted Standard
ISO 9208-1989, NEQ
Regulation (derived from)
Development & Reform Commission Bulletin 2006 No. 46; National AQSIQ National Standardization Committee Bulletin (2007 No. 146)
Issuing agency(ies)
State Quality and Technical Supervision